Malware Analysis Report

2024-11-13 16:11

Sample ID 241103-deay6awkdp
Target 63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf
SHA256 63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c
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

63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c

Threat Level: Known bad

The file 63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf was found to be: Known bad.

Malicious Activity Summary

kaiji discovery execution persistence privilege_escalatio

Kaiji family

Kaiji

Executes dropped EXE

Creates/modifies Cron job

Command and Scripting Interpreter: Unix Shell

Enumerates kernel/hardware configuration

Reads runtime system information

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-03 02:54

Signatures

Kaiji

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

Kaiji family

kaiji

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-03 02:54

Reported

2024-11-03 02:57

Platform

debian9-mipsbe-20240611-en

Max time kernel

150s

Max time network

151s

Command Line

[/tmp/63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf]

Signatures

Kaiji

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

Kaiji family

kaiji

Executes dropped EXE

Description Indicator Process Target
N/A /etc/32676 /etc/32676 N/A
N/A /etc/opt.services.cfg /etc/opt.services.cfg N/A
N/A /etc/opt.services.cfg /etc/opt.services.cfg N/A
N/A /etc/opt.services.cfg /etc/opt.services.cfg N/A
N/A /etc/opt.services.cfg /etc/opt.services.cfg N/A

Creates/modifies Cron job

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

Command and Scripting Interpreter: Unix Shell

execution
Description Indicator Process Target
N/A N/A /bin/sh N/A
N/A N/A /bin/sh N/A

Enumerates kernel/hardware configuration

discovery
Description Indicator Process Target
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /tmp/63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf 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/63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf 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 /etc/opt.services.cfg N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /etc/opt.services.cfg N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /etc/opt.services.cfg N/A
File opened for reading /sys/kernel/mm/transparent_hugepage/hpage_pmd_size /etc/opt.services.cfg N/A

Reads runtime system information

discovery
Description Indicator Process Target
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/self/stat /bin/systemctl N/A
File opened for reading /proc/1/environ /bin/systemctl 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/cmdline /bin/systemctl N/A
File opened for reading /proc/cmdline /bin/systemctl N/A
File opened for reading /proc/filesystems /bin/mount N/A
File opened for reading /proc/1/environ /bin/systemctl N/A
File opened for reading /proc/filesystems /bin/sed 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/self/stat /bin/systemctl 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/1/environ /bin/systemctl 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/1/environ /bin/systemctl N/A
File opened for reading /proc/cmdline /bin/systemctl N/A
File opened for reading /proc/filesystems /bin/sed N/A
File opened for reading /proc/1/environ /bin/systemctl N/A
File opened for reading /proc/self/stat /bin/systemctl N/A
File opened for reading /proc/cmdline /bin/systemctl 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/filesystems /bin/systemctl N/A
File opened for reading /proc/self/stat /bin/systemctl N/A
File opened for reading /proc/filesystems /bin/systemctl N/A
File opened for reading /proc/cmdline /bin/systemctl N/A

Processes

/tmp/63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf

[/tmp/63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf]

/tmp/63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf

[/tmp/63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c.elf ]

/bin/sh

[/bin/sh -c /etc/32676&]

/etc/32676

[/etc/32676]

/usr/sbin/service

[service crond start]

/bin/sleep

[sleep 60]

/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 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]

/bin/sh

[/bin/sh -c echo "*/1 * * * * root /.mod " >> /etc/crontab]

/usr/bin/renice

[renice -20 705]

/bin/mount

[mount -o bind /tmp/ /proc/705]

/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/opt.services.cfg

[/etc/opt.services.cfg]

/etc/opt.services.cfg

[/etc/opt.services.cfg ]

/bin/sleep

[sleep 60]

/etc/opt.services.cfg

[/etc/opt.services.cfg]

/etc/opt.services.cfg

[/etc/opt.services.cfg ]

/bin/sleep

[sleep 60]

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
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US 1.1.1.1:53 ss.us-tv.top udp
US 1.1.1.1:53 ss.us-tv.top udp
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Files

/etc/.walk

MD5 ed61e5384b767dc9387c3297f7644c7a
SHA1 92aea3e1516267131884bd14d589da5d05945253
SHA256 0bacccbfb60e622d5eb13d01254515cea82c7d025aec7130feb4dbdf4e28540d
SHA512 0051e0d7b7b4134967e3fa6f1b28a25ba1fc7845016471c81f19292cd16e6c655b64800483bcb093e482b7ba17f0f3260a5f4d39311a46c0ead432a1c9a3d77d

/etc/.walk

MD5 99070834e5b06f5b564e2ece9d138d33
SHA1 1af1c8bee403a3e15a1090b75d39b639882dbcb4
SHA256 3979dfee18a2af9f72dcee49649a0520551c7a7284a8b86238d531c701f27bdf
SHA512 a931a8bf476905519b99771dac38dbba8985266a2247890ad6c2a5d073e907f4d37696933074a54429cc46f8eaac7acc426c26a03aaff27f114487696fbb5129

/etc/opt.services.cfg

MD5 b5a8f29c137a214ffef83b0bc5daad97
SHA1 90fc46188e7bc83a423a3ea8fe0392660f594eb0
SHA256 63bfb2501a4607933ba3bdbbdfeca57a80017215006877b52638fd8ad126788c
SHA512 ed372ee7f59c15b9dbf005f20d660223b23c04a0d3f660efdcfb9fc1bd9a0d5aca836befecc6a155104607883520f8da0ff911534dd330ade448f52c9d52e544

/etc/32676

MD5 47684525bfdf26f49fd1cf742b17c015
SHA1 c4ab14ba22420ff9acadfc698a38d0cd99e9fbfa
SHA256 b7ce294613dd2c237a4a50548bfcd5c14d166107f2d2e965499bc78695300d5b
SHA512 948f9c519ae9afe1c821c5d58da2e584e50356dabef597ccd408853a9038560b9fb1c5894900e2725b48977ffd49d18a439436bb4946e2164ac9fcf2a8637621

/.mod

MD5 f5a3713282e43c200f30342f5ff5e2ea
SHA1 2b2ce1a207e2b691a074c6f78f71c4785aae426a
SHA256 6ab64e727571458d4884fb2fe82c27c467db0699cb8f648b3f0217c35d2b7511
SHA512 5bcb8cd360409147a486755f90e0cdd97183af02ce8de5135b7c6a8a010deb9ef12dcd5ee9a2a8fd2e159347f68e72d6b7fd75e943b4fcd928d7a74b97476013

/usr/bin/include/find

MD5 97b5c6c1b307114efc38193175a343c3
SHA1 24015d4f95c6878ea5027c134eddebb7126b610f
SHA256 b1a89f313023b476fc826d8fac689679504e61ae8e650681fb966e810ed34970
SHA512 e5359f3e082f54f5cfd7afa7771d8724d161d48d09372f203bdca222a47a63919fdfb76b6db7fb8ff61e92f8fd04fdec962e94331ff12705cf53ce5e23d33180

/etc/profile.d/gateway.sh

MD5 7e6e661a9a61c00a6ae1f3fdb0232e03
SHA1 8ba350b8b60e5b01d7f067ad7304a6917d4dbe99
SHA256 5c25e54fc32f41d2e0e592446698e124baf148046cbb538df75b53434f05ddb2
SHA512 92828955cbb5f4020467479e27cd9a9caa8752e716c2872ec51d2bfadbf8ee4767abb6306b5b0a2cf04437911a8d8c4449287ab4a41ae30a276dbc09d19fc054