Malware Analysis Report

2024-11-15 08:27

Sample ID 241105-efrhzatjgt
Target 85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf
SHA256 85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e
Tags
kaiji discovery execution persistence privilege_escalatio
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e

Threat Level: Known bad

The file 85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf was found to be: Known bad.

Malicious Activity Summary

kaiji discovery execution persistence privilege_escalatio

Kaiji

Kaiji family

kaiji_chaosbot

Executes dropped EXE

Creates/modifies Cron job

Enumerates running processes

Changes its process name

Reads CPU attributes

Reads runtime system information

Enumerates kernel/hardware configuration

GoLang User-Agent

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-05 03:53

Signatures

Kaiji

Description Indicator Process Target
N/A N/A N/A N/A

Kaiji family

kaiji

kaiji_chaosbot

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-05 03:53

Reported

2024-11-05 03:55

Platform

debian9-mipsbe-20240611-en

Max time kernel

150s

Max time network

157s

Command Line

[/tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf]

Signatures

Kaiji

Description Indicator Process Target
N/A N/A N/A N/A

Kaiji family

kaiji

kaiji_chaosbot

Description Indicator Process Target
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A /etc/32678 /etc/32678 N/A
N/A /etc/id.services.conf /etc/id.services.conf N/A
N/A /etc/32678 /etc/32678 N/A
N/A /etc/id.services.conf /etc/id.services.conf N/A

Creates/modifies Cron job

execution persistence privilege_escalatio
Description Indicator Process Target
File opened for modification /etc/crontab /bin/bash N/A

Enumerates running processes

Changes its process name

Description Indicator Process Target
Changes the process name, possibly in an attempt to hide itself ksoftirqd/0 /tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf N/A

Reads CPU attributes

discovery
Description Indicator Process Target
File opened for reading /sys/devices/system/cpu/online /usr/bin/pkill N/A

Enumerates kernel/hardware configuration

discovery
Description Indicator Process Target
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /etc/id.services.conf N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /etc/id.services.conf N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf N/A
File opened for reading /sys/fs/kdbus/0-system/bus /bin/systemctl N/A

Reads runtime system information

discovery
Description Indicator Process Target
File opened for reading /proc/4/status /usr/bin/pkill N/A
File opened for reading /proc/9/status /usr/bin/pkill N/A
File opened for reading /proc/19/status /usr/bin/pkill N/A
File opened for reading /proc/21/status /usr/bin/pkill N/A
File opened for reading /proc/69/status /usr/bin/pkill N/A
File opened for reading /proc/147/status /usr/bin/pkill N/A
File opened for reading /proc/cmdline /bin/systemctl N/A
File opened for reading /proc/1/environ /bin/systemctl N/A
File opened for reading /proc/714/status /usr/bin/pkill N/A
File opened for reading /proc/760/cmdline /usr/bin/pkill N/A
File opened for reading /proc/10/status /usr/bin/pkill N/A
File opened for reading /proc/16/status /usr/bin/pkill N/A
File opened for reading /proc/72/status /usr/bin/pkill N/A
File opened for reading /proc/73/status /usr/bin/pkill N/A
File opened for reading /proc/319/status /usr/bin/pkill N/A
File opened for reading /proc/filesystems /bin/systemctl N/A
File opened for reading /proc/cmdline /bin/systemctl N/A
File opened for reading /proc/4/cmdline /usr/bin/pkill N/A
File opened for reading /proc/14/status /usr/bin/pkill N/A
File opened for reading /proc/filesystems /bin/sed N/A
File opened for reading /proc/filesystems /bin/systemctl N/A
File opened for reading /proc/1/environ /bin/systemctl N/A
File opened for reading /proc/9/cmdline /usr/bin/pkill N/A
File opened for reading /proc/23/cmdline /usr/bin/pkill N/A
File opened for reading /proc/701/status /usr/bin/pkill N/A
File opened for reading /proc/3/cmdline /usr/bin/pkill N/A
File opened for reading /proc/8/status /usr/bin/pkill N/A
File opened for reading /proc/7/status /usr/bin/pkill N/A
File opened for reading /proc/11/status /usr/bin/pkill N/A
File opened for reading /proc/11/cmdline /usr/bin/pkill N/A
File opened for reading /proc/filesystems /bin/systemctl N/A
File opened for reading /proc/cmdline /bin/systemctl N/A
File opened for reading /proc/sys/kernel/osrelease /usr/bin/pkill N/A
File opened for reading /proc/12/status /usr/bin/pkill N/A
File opened for reading /proc/36/cmdline /usr/bin/pkill N/A
File opened for reading /proc/78/status /usr/bin/pkill N/A
File opened for reading /proc/726/cmdline /usr/bin/pkill N/A
File opened for reading /proc/1/environ /bin/systemctl N/A
File opened for reading /proc/filesystems /bin/systemctl N/A
File opened for reading /proc/10/cmdline /usr/bin/pkill N/A
File opened for reading /proc/22/status /usr/bin/pkill N/A
File opened for reading /proc/74/cmdline /usr/bin/pkill N/A
File opened for reading /proc/538/cmdline /usr/bin/pkill N/A
File opened for reading /proc/539/status /usr/bin/pkill N/A
File opened for reading /proc/filesystems /bin/mount N/A
File opened for reading /proc/cmdline /bin/systemctl N/A
File opened for reading /proc/316/cmdline /usr/bin/pkill N/A
File opened for reading /proc/374/cmdline /usr/bin/pkill N/A
File opened for reading /proc/389/cmdline /usr/bin/pkill N/A
File opened for reading /proc/filesystems /bin/systemctl N/A
File opened for reading /proc/self/stat /bin/systemctl N/A
File opened for reading /proc/5/status /usr/bin/pkill N/A
File opened for reading /proc/781/cmdline /usr/bin/pkill N/A
File opened for reading /proc/cmdline /bin/systemctl N/A
File opened for reading /proc/19/cmdline /usr/bin/pkill N/A
File opened for reading /proc/141/status /usr/bin/pkill N/A
File opened for reading /proc/103/status /usr/bin/pkill N/A
File opened for reading /proc/self/stat /bin/systemctl N/A
File opened for reading /proc/1/environ /bin/systemctl N/A
File opened for reading /proc/17/cmdline /usr/bin/pkill N/A
File opened for reading /proc/74/status /usr/bin/pkill N/A
File opened for reading /proc/382/cmdline /usr/bin/pkill N/A
File opened for reading /proc/538/status /usr/bin/pkill N/A
File opened for reading /proc/703/status /usr/bin/pkill N/A

GoLang User-Agent

Description Indicator Process Target
HTTP User-Agent header Go-http-client/1.1 N/A N/A

Processes

/tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf

[/tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf]

/bin/sh

[sh -c /etc/32678&]

/usr/sbin/service

[service crond start]

/tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf

[/tmp/85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e.elf ]

/etc/32678

[/etc/32678]

/usr/bin/basename

[basename /usr/sbin/service]

/usr/sbin/update-rc.d

[update-rc.d linux_kill defaults]

/bin/sleep

[sleep 60]

/usr/bin/basename

[basename /usr/sbin/service]

/bin/systemctl

[systemctl --quiet is-active multi-user.target]

/bin/systemctl

[systemctl list-unit-files --full --type=socket]

/bin/sed

[sed -ne s/\.socket\s*[a-z]*\s*$/.socket/p]

/usr/local/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/usr/local/bin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/usr/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/usr/bin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/bin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/usr/local/sbin/systemctl

[systemctl daemon-reload]

/usr/local/bin/systemctl

[systemctl daemon-reload]

/usr/sbin/systemctl

[systemctl daemon-reload]

/usr/bin/systemctl

[systemctl daemon-reload]

/sbin/systemctl

[systemctl daemon-reload]

/bin/systemctl

[systemctl daemon-reload]

/bin/bash

[bash -c echo "*/1 * * * * root /.img " >> /etc/crontab]

/usr/bin/renice

[renice -20 721]

/bin/mount

[mount -o bind /tmp/ /proc/721]

/usr/sbin/service

[service cron start]

/usr/bin/basename

[basename /usr/sbin/service]

/usr/bin/basename

[basename /usr/sbin/service]

/bin/systemctl

[systemctl --quiet is-active multi-user.target]

/bin/systemctl

[systemctl list-unit-files --full --type=socket]

/bin/sed

[sed -ne s/\.socket\s*[a-z]*\s*$/.socket/p]

/usr/local/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start cron.service]

/usr/local/bin/systemctl

[systemctl --job-mode=ignore-dependencies start cron.service]

/usr/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start cron.service]

/usr/bin/systemctl

[systemctl --job-mode=ignore-dependencies start cron.service]

/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start cron.service]

/bin/systemctl

[systemctl --job-mode=ignore-dependencies start cron.service]

/bin/systemctl

[systemctl start crond.service]

/etc/id.services.conf

[/etc/id.services.conf]

/usr/bin/pkill

[pkill -9 32678]

/bin/sh

[sh -c /etc/32678&]

/usr/sbin/service

[service crond start]

/etc/32678

[/etc/32678]

/etc/id.services.conf

[/etc/id.services.conf ]

/usr/bin/basename

[basename /usr/sbin/service]

/bin/sleep

[sleep 60]

/usr/bin/basename

[basename /usr/sbin/service]

/bin/systemctl

[systemctl --quiet is-active multi-user.target]

/bin/sed

[sed -ne s/\.socket\s*[a-z]*\s*$/.socket/p]

/bin/systemctl

[systemctl list-unit-files --full --type=socket]

/usr/local/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/usr/local/bin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/usr/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/usr/bin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/sbin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

/bin/systemctl

[systemctl --job-mode=ignore-dependencies start crond.service]

Network

Country Destination Domain Proto
US 1.1.1.1:53 www.google.com udp
US 1.1.1.1:53 www.google.com udp
US 1.1.1.1:53 78789.dns.army udp
US 1.1.1.1:53 78789.dns.army udp
HK 154.12.82.11:7850 78789.dns.army tcp
HK 154.12.82.11:808 78789.dns.army tcp
N/A 10.127.0.1:22 tcp
N/A 10.127.0.3:22 tcp
N/A 10.127.0.4:22 tcp
N/A 10.127.0.5:22 tcp
N/A 10.127.0.2:22 tcp
N/A 10.127.0.6:22 tcp
N/A 10.127.0.10:22 tcp
N/A 10.127.0.7:22 tcp
N/A 10.127.0.8:22 tcp
N/A 10.127.0.9:22 tcp
N/A 10.127.0.12:22 tcp
N/A 10.127.0.14:22 tcp
N/A 10.127.0.11:22 tcp
N/A 10.127.0.13:22 tcp
N/A 10.127.0.15:22 tcp
N/A 10.127.0.17:22 tcp
N/A 10.127.0.18:22 tcp
N/A 10.127.0.20:22 tcp
N/A 10.127.0.19:22 tcp
N/A 10.127.0.16:22 tcp
N/A 10.127.0.21:22 tcp
N/A 10.127.0.22:22 tcp
N/A 10.127.0.24:22 tcp
N/A 10.127.0.23:22 tcp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
N/A 10.127.0.25:22 tcp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
N/A 10.127.0.26:22 tcp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
N/A 10.127.0.27:22 tcp
N/A 10.127.0.28:22 tcp
N/A 10.127.0.29:22 tcp
N/A 10.127.0.30:22 tcp
N/A 10.127.0.31:22 tcp
N/A 10.127.0.35:22 tcp
N/A 10.127.0.32:22 tcp
N/A 10.127.0.34:22 tcp
N/A 10.127.0.33:22 tcp
N/A 10.127.0.36:22 tcp
N/A 10.127.0.38:22 tcp
N/A 10.127.0.37:22 tcp
N/A 10.127.0.39:22 tcp
N/A 10.127.0.40:22 tcp
N/A 10.127.0.42:22 tcp
N/A 10.127.0.44:22 tcp
N/A 10.127.0.43:22 tcp
N/A 10.127.0.41:22 tcp
N/A 10.127.0.45:22 tcp
N/A 10.127.0.46:22 tcp
N/A 10.127.0.49:22 tcp
N/A 10.127.0.47:22 tcp
N/A 10.127.0.48:22 tcp
N/A 10.127.0.50:22 tcp
N/A 10.127.0.55:22 tcp
N/A 10.127.0.53:22 tcp
N/A 10.127.0.52:22 tcp
N/A 10.127.0.51:22 tcp
N/A 10.127.0.54:22 tcp
N/A 10.127.0.59:22 tcp
N/A 10.127.0.56:22 tcp
N/A 10.127.0.57:22 tcp
N/A 10.127.0.58:22 tcp
N/A 10.127.0.63:22 tcp
N/A 10.127.0.64:22 tcp
N/A 10.127.0.62:22 tcp
N/A 10.127.0.61:22 tcp
N/A 10.127.0.67:22 tcp
N/A 10.127.0.68:22 tcp
N/A 10.127.0.65:22 tcp
N/A 10.127.0.66:22 tcp
N/A 10.127.0.70:22 tcp
N/A 10.127.0.73:22 tcp
N/A 10.127.0.72:22 tcp
N/A 10.127.0.71:22 tcp
N/A 10.127.0.69:22 tcp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
US 1.1.1.1:53 debian9-mipsbe-20240611-en-10 udp
N/A 10.127.0.77:22 tcp
N/A 10.127.0.74:22 tcp
N/A 10.127.0.76:22 tcp
N/A 10.127.0.75:22 tcp
N/A 10.127.0.78:22 tcp
N/A 10.127.0.82:22 tcp
N/A 10.127.0.83:22 tcp
N/A 10.127.0.79:22 tcp
N/A 10.127.0.81:22 tcp
N/A 10.127.0.80:22 tcp
N/A 10.127.0.86:22 tcp
N/A 10.127.0.85:22 tcp
N/A 10.127.0.84:22 tcp
N/A 10.127.0.87:22 tcp
N/A 10.127.0.88:22 tcp
N/A 10.127.0.89:22 tcp
N/A 10.127.0.93:22 tcp
N/A 10.127.0.92:22 tcp
N/A 10.127.0.91:22 tcp
N/A 10.127.0.90:22 tcp
N/A 10.127.0.96:22 tcp
N/A 10.127.0.94:22 tcp
N/A 10.127.0.95:22 tcp
N/A 10.127.0.97:22 tcp
N/A 10.127.0.98:22 tcp
N/A 10.127.0.103:22 tcp
N/A 10.127.0.102:22 tcp
N/A 10.127.0.100:22 tcp
N/A 10.127.0.101:22 tcp
N/A 10.127.0.99:22 tcp
N/A 10.127.0.105:22 tcp
N/A 10.127.0.107:22 tcp
N/A 10.127.0.108:22 tcp
N/A 10.127.0.106:22 tcp
N/A 10.127.0.104:22 tcp
N/A 10.127.0.110:22 tcp
N/A 10.127.0.109:22 tcp
N/A 10.127.0.113:22 tcp
N/A 10.127.0.111:22 tcp
N/A 10.127.0.112:22 tcp
N/A 10.127.0.114:22 tcp
N/A 10.127.0.116:22 tcp
N/A 10.127.0.117:22 tcp
N/A 10.127.0.118:22 tcp
N/A 10.127.0.115:22 tcp
N/A 10.127.0.122:22 tcp
N/A 10.127.0.123:22 tcp
N/A 10.127.0.121:22 tcp
N/A 10.127.0.120:22 tcp
N/A 10.127.0.119:22 tcp
N/A 10.127.0.125:22 tcp
N/A 10.127.0.128:22 tcp
N/A 10.127.0.124:22 tcp
N/A 10.127.0.126:22 tcp
N/A 10.127.0.127:22 tcp
N/A 10.127.0.129:22 tcp
N/A 10.127.0.130:22 tcp
N/A 10.127.0.133:22 tcp
N/A 10.127.0.132:22 tcp
N/A 10.127.0.131:22 tcp
N/A 10.127.0.135:22 tcp
N/A 10.127.0.136:22 tcp
N/A 10.127.0.138:22 tcp
N/A 10.127.0.134:22 tcp
N/A 10.127.0.137:22 tcp
N/A 10.127.0.140:22 tcp
N/A 10.127.0.143:22 tcp
N/A 10.127.0.142:22 tcp
N/A 10.127.0.141:22 tcp
N/A 10.127.0.139:22 tcp
N/A 10.127.0.144:22 tcp
N/A 10.127.0.145:22 tcp
N/A 10.127.0.146:22 tcp
N/A 10.127.0.147:22 tcp
N/A 10.127.0.148:22 tcp
N/A 10.127.0.149:22 tcp
N/A 10.127.0.151:22 tcp
N/A 10.127.0.152:22 tcp
N/A 10.127.0.153:22 tcp
N/A 10.127.0.150:22 tcp

Files

/etc/id.services.conf

MD5 17fac7ffcec5df4d624a5e46c3ce97d1
SHA1 21c0af1bd2753963f2444b999d646a7ed6f02033
SHA256 85c0c57eed2a9c08b00919203227ba566a1239457b2edf88ea83d82b4b5e551e
SHA512 90026422a550a6f10b6a0b8dac521a2ce4a0f9575f5c177ebf70d71ad1a815aa0aebada2e188207b8dfb6ba10597c4d59c4ff037e7b766bb55144b9a0413bcde

/etc/32678

MD5 768eaf287796da19e1cf5e0b2fb1b161
SHA1 6a1ce2ee5ccc86d1f33806feb14547b35290df2a
SHA256 1d22620dfb2a6715e5d745aed5cf841ede0e75e1747f12b9b925a2d346bc7ecb
SHA512 e6af30c9df4f7f47696069511e64ecbc8e841629d692ee4056503df3533fb7a7a74960698826260355e1dba7b6c562482a27a39bb51a4237473ce4b68472d620

/etc/init.d/linux_kill

MD5 3909975f7cc0d1121c1819b800069f31
SHA1 3e68de708c2e6c40fab6794afdee3104e5590189
SHA256 6876dac71f13a068afb863d257134275f2edba43b2acaf4924fabf97c079070b
SHA512 50600cceeb03b05f45ae61d890caee9f51ff390b6776930866e527e071d65d08241fc66673fd9b99d62fbc77d3c00fc3de4d7378cbc42f5daba5d83072b0906e

/etc/profile.d/bash_config.sh

MD5 cfb4e51061485fe91169381fbdc1538e
SHA1 9a85b9b766a15b01737a41d680e4593b7a9bde87
SHA256 897f37267d0ceaa2fbdaa09847f5d08e6f8b01a0348a0d666264b0f10acd0c90
SHA512 fb154ec711d2090a7461da4db8ddad2b522649a27e74162ecb203f539b1729430288bc02d78d2071bde9c4bbc005693403a57612ef50277d52f816cb94524216

/.img

MD5 d73d3376908ea075a939e3871ad0fabe
SHA1 320ff65831247ba199515f1b94df26cc8a3e5f76
SHA256 edbdabe30d8236a2c0a4eb89dfd597552130e4c1a4e93f8fe1568920442ad73a
SHA512 57b83fef88620598beb5d65626bf757d0abef242d2d6a01796a61474dedc5095a4a9d0f292b6abb450cad3d4410ab8456253600f58ddb66cfe6d79e1c8415536