Malware Analysis Report

2024-11-13 16:11

Sample ID 241101-fz8f9svrcx
Target be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf
SHA256 be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41
Tags
kaiji defense_evasion discovery persistence privilege_escalation
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

be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41

Threat Level: Known bad

The file be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf was found to be: Known bad.

Malicious Activity Summary

kaiji defense_evasion discovery persistence privilege_escalation

Kaiji family

kaiji_chaosbot

Kaiji

Executes dropped EXE

Modifies Watchdog functionality

Modifies init.d

Modifies systemd

Enumerates running processes

Reads CPU attributes

Enumerates kernel/hardware configuration

Reads runtime system information

GoLang User-Agent

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-01 05:19

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

2024-11-01 05:19

Reported

2024-11-01 05:22

Platform

debian12-mipsel-20240221-en

Max time kernel

153s

Max time network

165s

Command Line

[/tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf]

Signatures

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/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

Modifies Watchdog functionality

defense_evasion
Description Indicator Process Target
File opened for modification /dev/misc/watchdog /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for modification /dev/watchdog /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A

Enumerates running processes

Modifies init.d

persistence
Description Indicator Process Target
File opened for modification /etc/init.d/linux_kill /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A

Modifies systemd

persistence privilege_escalation
Description Indicator Process Target
File opened for modification /usr/lib/systemd/system/linux.service /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A

Reads CPU attributes

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

Enumerates kernel/hardware configuration

discovery
Description Indicator Process Target
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf 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/devices/system/node /usr/bin/pkill 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

Reads runtime system information

discovery
Description Indicator Process Target
File opened for reading /proc/334/cmdline /usr/bin/pkill N/A
File opened for reading /proc/830/cgroup /usr/bin/pkill N/A
File opened for reading /proc/836/cmdline /usr/bin/pkill N/A
File opened for reading /proc/37/cmdline /usr/bin/pkill N/A
File opened for reading /proc/48/stat /usr/bin/pkill N/A
File opened for reading /proc/837/stat /usr/bin/pkill N/A
File opened for reading /proc/403/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/10/status /usr/bin/pkill N/A
File opened for reading /proc/32/cmdline /usr/bin/pkill N/A
File opened for reading /proc/35/stat /usr/bin/pkill N/A
File opened for reading /proc/59/cgroup /usr/bin/pkill N/A
File opened for reading /proc/691/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/self/status /usr/bin/pkill N/A
File opened for reading /proc/13/cgroup /usr/bin/pkill N/A
File opened for reading /proc/45/status /usr/bin/pkill N/A
File opened for reading /proc/58/status /usr/bin/pkill N/A
File opened for reading /proc/59/status /usr/bin/pkill N/A
File opened for reading /proc/822/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/34/stat /usr/bin/pkill N/A
File opened for reading /proc/771/status /usr/bin/pkill N/A
File opened for reading /proc/27/status /usr/bin/pkill N/A
File opened for reading /proc/45/cgroup /usr/bin/pkill N/A
File opened for reading /proc/58/stat /usr/bin/pkill N/A
File opened for reading /proc/116/stat /usr/bin/pkill N/A
File opened for reading /proc/392/status /usr/bin/pkill N/A
File opened for reading /proc/410/cgroup /usr/bin/pkill N/A
File opened for reading /proc/14/cgroup /usr/bin/pkill N/A
File opened for reading /proc/390/ctty /usr/bin/pkill N/A
File opened for reading /proc/835/cgroup /usr/bin/pkill N/A
File opened for reading /proc/857/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/113/cmdline /usr/bin/pkill N/A
File opened for reading /proc/180/cmdline /usr/bin/pkill N/A
File opened for reading /proc/419/status /usr/bin/pkill N/A
File opened for reading /proc/732/status /usr/bin/pkill N/A
File opened for reading /proc/830/status /usr/bin/pkill N/A
File opened for reading /proc/835/ctty /usr/bin/pkill N/A
File opened for reading /proc/866/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/751/status /usr/bin/pkill N/A
File opened for reading /proc/31/stat /usr/bin/pkill N/A
File opened for reading /proc/114/cmdline /usr/bin/pkill N/A
File opened for reading /proc/119/cgroup /usr/bin/pkill N/A
File opened for reading /proc/403/status /usr/bin/pkill N/A
File opened for reading /proc/733/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/793/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/47/status /usr/bin/pkill N/A
File opened for reading /proc/20/cgroup /usr/bin/pkill N/A
File opened for reading /proc/58/cmdline /usr/bin/pkill N/A
File opened for reading /proc/732/stat /usr/bin/pkill N/A
File opened for reading /proc/24/stat /usr/bin/pkill N/A
File opened for reading /proc/24/cmdline /usr/bin/pkill N/A
File opened for reading /proc/47/stat /usr/bin/pkill N/A
File opened for reading /proc/403/ctty /usr/bin/pkill N/A
File opened for reading /proc/852/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/14/status /usr/bin/pkill N/A
File opened for reading /proc/22/stat /usr/bin/pkill N/A
File opened for reading /proc/732/ctty /usr/bin/pkill N/A
File opened for reading /proc/860/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/17/status /usr/bin/pkill N/A
File opened for reading /proc/768/stat /usr/bin/pkill N/A
File opened for reading /proc/875/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/782/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/816/stat /tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf N/A
File opened for reading /proc/4/status /usr/bin/pkill N/A
File opened for reading /proc/5/ctty /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/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf

[/tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf]

/usr/bin/sh

[sh -c /etc/32678&]

/usr/sbin/service

[service crond start]

/tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf

[/tmp/be95b29da48e169996c492b3c95f55c8af679136df3adaabd24a5d67d3c2af41.elf ]

/etc/32678

[/etc/32678]

/usr/bin/basename

[basename /usr/sbin/service]

/usr/bin/sleep

[sleep 60]

/usr/bin/basename

[basename /usr/sbin/service]

/usr/bin/systemctl

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

/usr/bin/sed

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

/usr/sbin/update-rc.d

[update-rc.d linux_kill defaults]

/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]

/usr/local/sbin/systemctl

[systemctl start crond.service]

/usr/local/bin/systemctl

[systemctl start crond.service]

/usr/sbin/systemctl

[systemctl start crond.service]

/usr/bin/systemctl

[systemctl start crond.service]

/etc/id.services.conf

[/etc/id.services.conf]

/usr/bin/sh

[sh -c cd /boot;systemctl daemon-reload;systemctl enable linux.service;systemctl start linux.service;journalctl -xe --no-pager]

/usr/bin/systemctl

[systemctl daemon-reload]

/usr/bin/pkill

[pkill -9 32678]

/usr/bin/sh

[sh -c /etc/32678&]

/usr/sbin/service

[service crond start]

/etc/id.services.conf

[/etc/id.services.conf ]

/etc/32678

[/etc/32678]

/usr/bin/basename

[basename /usr/sbin/service]

/usr/bin/sleep

[sleep 60]

/usr/bin/basename

[basename /usr/sbin/service]

/usr/bin/systemctl

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

/usr/bin/sed

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

/usr/bin/systemctl

[systemctl enable linux.service]

/usr/local/sbin/systemctl

[systemctl start crond.service]

/usr/local/bin/systemctl

[systemctl start crond.service]

/usr/sbin/systemctl

[systemctl start crond.service]

/usr/bin/systemctl

[systemctl start crond.service]

/etc/id.services.conf

[/etc/id.services.conf]

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 149.88.76.121:808 78789.dns.army tcp
US 1.1.1.1:53 debian12-mipsel-20240221-en-1 udp
US 1.1.1.1:53 debian12-mipsel-20240221-en-1 udp
US 1.1.1.1:53 debian12-mipsel-20240221-en-1 udp
US 1.1.1.1:53 debian12-mipsel-20240221-en-1 udp
HK 149.88.76.121:8088 78789.dns.army tcp
N/A 10.127.0.1:22 tcp
N/A 10.127.0.5:22 tcp
N/A 10.127.0.2:22 tcp
N/A 10.127.0.4:22 tcp
N/A 10.127.0.8:22 tcp
N/A 10.127.0.9:22 tcp
N/A 10.127.0.7:22 tcp
N/A 10.127.0.6:22 tcp
N/A 10.127.0.10:22 tcp
N/A 10.127.0.11:22 tcp
N/A 10.127.0.12:22 tcp
N/A 10.127.0.14:22 tcp
N/A 10.127.0.13:22 tcp
N/A 10.127.0.15:22 tcp
N/A 10.127.0.19:22 tcp
N/A 10.127.0.17:22 tcp
N/A 10.127.0.18:22 tcp
N/A 10.127.0.16:22 tcp
N/A 10.127.0.20:22 tcp
N/A 10.127.0.21:22 tcp
N/A 10.127.0.23:22 tcp
N/A 10.127.0.22:22 tcp
N/A 10.127.0.24:22 tcp
N/A 10.127.0.25:22 tcp
N/A 10.127.0.28:22 tcp
N/A 10.127.0.26:22 tcp
N/A 10.127.0.29:22 tcp
N/A 10.127.0.27:22 tcp
N/A 10.127.0.30:22 tcp
N/A 10.127.0.32:22 tcp
N/A 10.127.0.31:22 tcp
N/A 10.127.0.33:22 tcp
N/A 10.127.0.34:22 tcp
N/A 10.127.0.35:22 tcp
N/A 10.127.0.36:22 tcp
N/A 10.127.0.37:22 tcp
N/A 10.127.0.38:22 tcp
N/A 10.127.0.39:22 tcp
N/A 10.127.0.40:22 tcp
N/A 10.127.0.43:22 tcp
N/A 10.127.0.41:22 tcp
N/A 10.127.0.44:22 tcp
N/A 10.127.0.42:22 tcp
N/A 10.127.0.45:22 tcp
N/A 10.127.0.47:22 tcp
N/A 10.127.0.49:22 tcp
N/A 10.127.0.46:22 tcp
N/A 10.127.0.50:22 tcp
N/A 10.127.0.48:22 tcp
N/A 10.127.0.53:22 tcp
N/A 10.127.0.52:22 tcp
N/A 10.127.0.54:22 tcp
N/A 10.127.0.51:22 tcp
N/A 10.127.0.55:22 tcp
N/A 10.127.0.57:22 tcp
N/A 10.127.0.56:22 tcp
N/A 10.127.0.59:22 tcp
N/A 10.127.0.60:22 tcp
N/A 10.127.0.58:22 tcp
N/A 10.127.0.65:22 tcp
N/A 10.127.0.61:22 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 10.127.0.69:22 tcp
N/A 10.127.0.68:22 tcp
N/A 10.127.0.71:22 tcp
N/A 10.127.0.74:22 tcp
N/A 10.127.0.73:22 tcp
N/A 10.127.0.72:22 tcp
N/A 10.127.0.75:22 tcp
N/A 10.127.0.76:22 tcp
N/A 10.127.0.78:22 tcp
N/A 10.127.0.80:22 tcp
N/A 10.127.0.79:22 tcp
N/A 10.127.0.77:22 tcp
N/A 10.127.0.82:22 tcp
N/A 10.127.0.81:22 tcp
N/A 10.127.0.84:22 tcp
N/A 10.127.0.83:22 tcp
N/A 10.127.0.85:22 tcp
N/A 10.127.0.86:22 tcp
N/A 10.127.0.87:22 tcp
N/A 10.127.0.88:22 tcp
N/A 10.127.0.90:22 tcp
N/A 10.127.0.89:22 tcp
N/A 10.127.0.91:22 tcp
N/A 10.127.0.93:22 tcp
N/A 10.127.0.94:22 tcp
N/A 10.127.0.95:22 tcp
N/A 10.127.0.92:22 tcp
N/A 10.127.0.96:22 tcp
N/A 10.127.0.98:22 tcp
N/A 10.127.0.99:22 tcp
N/A 10.127.0.100:22 tcp
N/A 10.127.0.97:22 tcp
N/A 10.127.0.101:22 tcp
N/A 10.127.0.102:22 tcp
N/A 10.127.0.103:22 tcp
N/A 10.127.0.105:22 tcp
N/A 10.127.0.104:22 tcp
N/A 10.127.0.106:22 tcp
N/A 10.127.0.107:22 tcp
N/A 10.127.0.108:22 tcp
N/A 10.127.0.109:22 tcp
N/A 10.127.0.110:22 tcp
N/A 10.127.0.111:22 tcp
N/A 10.127.0.114:22 tcp
N/A 10.127.0.112:22 tcp
N/A 10.127.0.113:22 tcp
N/A 10.127.0.115:22 tcp
N/A 10.127.0.116:22 tcp
N/A 10.127.0.118:22 tcp
N/A 10.127.0.117:22 tcp
N/A 10.127.0.119:22 tcp
N/A 10.127.0.120:22 tcp
N/A 10.127.0.121:22 tcp
N/A 10.127.0.122:22 tcp
N/A 10.127.0.123:22 tcp
N/A 10.127.0.125:22 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 10.127.0.128:22 tcp
N/A 10.127.0.129:22 tcp
N/A 10.127.0.130:22 tcp
N/A 10.127.0.131:22 tcp
N/A 10.127.0.132:22 tcp
N/A 10.127.0.135:22 tcp
N/A 10.127.0.133:22 tcp
N/A 10.127.0.134:22 tcp
N/A 10.127.0.139:22 tcp
N/A 10.127.0.136:22 tcp
N/A 10.127.0.137:22 tcp
N/A 10.127.0.138:22 tcp
N/A 10.127.0.140:22 tcp
N/A 10.127.0.142:22 tcp
N/A 10.127.0.144:22 tcp
N/A 10.127.0.141:22 tcp
N/A 10.127.0.143:22 tcp
N/A 10.127.0.145:22 tcp
N/A 10.127.0.147:22 tcp
N/A 10.127.0.148:22 tcp
N/A 10.127.0.146:22 tcp
N/A 10.127.0.149:22 tcp
N/A 10.127.0.150:22 tcp
N/A 10.127.0.151:22 tcp
N/A 10.127.0.152:22 tcp
N/A 10.127.0.154:22 tcp
N/A 10.127.0.153:22 tcp
N/A 10.127.0.155:22 tcp

Files

/etc/32678

MD5 768eaf287796da19e1cf5e0b2fb1b161
SHA1 6a1ce2ee5ccc86d1f33806feb14547b35290df2a
SHA256 1d22620dfb2a6715e5d745aed5cf841ede0e75e1747f12b9b925a2d346bc7ecb
SHA512 e6af30c9df4f7f47696069511e64ecbc8e841629d692ee4056503df3533fb7a7a74960698826260355e1dba7b6c562482a27a39bb51a4237473ce4b68472d620

/etc/init.d/linux_kill

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