d5a713ef50cf6d27d42b89ebe7815b19b05aa5917ac89aba3d89d53c382f8911 | Triage

Analysis

max time kernel
148s
max time network
151s
platform
ubuntu-24.04_amd64
resource
ubuntu2404-amd64-20240523-en
resource tags

arch:amd64arch:i386image:ubuntu2404-amd64-20240523-enkernel:6.8.0-31-genericlocale:en-usos:ubuntu-24.04-amd64system
submitted
03/07/2024, 16:27

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General

Target

cve_2024_6387/amd64
Size

5.1MB
MD5

2be087e54204a6c395e05516c53fd579
SHA1

3bdad143cd168a2015aba2053e53f99a24d52ace
SHA256

b60ad90687871ae94e2b33cf2320f523ee614893215335dc5958a6a705488330
SHA512

2ab629a5f9637c7026069e5cc7b473968290b8eb42158dc93c46613d2b4b0ef39149f158b71dda8b2c8bbbebd58ba28cf5437fc0d083fca37deb84423a769db8
SSDEEP

49152:YB9Em2vjYVfh5jw9aF8k4yHwXrD3LwJKiCb85E6l9HblTLEGdvIRKnuI:QDVf/Y4jMrDr8E+rvuK1

Score

7^/10

persistence

Malware Config

Signatures

Modifies Watchdog functionality 1 TTPs 2 IoCs

Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

Impair Defenses

description	ioc	Process
File opened for modification	/dev/watchdog	amd64
File opened for modification	/dev/misc/watchdog	amd64

Creates/modifies environment variables 1 TTPs 3 IoCs

Creating/modifying environment variables is a common persistence mechanism.

Hijack Execution Flow

description	ioc	Process
File opened for modification	/etc/profile.d/bash.cfg	amd64
File opened for modification	/etc/profile.d/bash.cfg.sh	amd64
File opened for modification	/etc/profile.d/gateway.sh	amd64

Modifies init.d 1 TTPs 30 IoCs

Adds/modifies system service, likely for persistence.

Boot or Logon Autostart Execution

description	ioc	Process
File opened for modification	/etc/init.d/anacron	amd64
File opened for modification	/etc/init.d/selinux-autorelabel	amd64
File opened for modification	/etc/init.d/cryptdisks-early	amd64
File opened for modification	/etc/init.d/iscsid	amd64
File opened for modification	/etc/init.d/open-iscsi	amd64
File opened for modification	/etc/init.d/plymouth	amd64
File opened for modification	/etc/init.d/cryptdisks	amd64
File opened for modification	/etc/init.d/procps	amd64
File opened for modification	/etc/init.d/saned	amd64
File opened for modification	/etc/init.d/sssd	amd64
File opened for modification	/etc/init.d/apport	amd64
File opened for modification	/etc/init.d/kmod	amd64
File opened for modification	/etc/init.d/plymouth-log	amd64
File opened for modification	/etc/init.d/x11-common	amd64
File opened for modification	/etc/init.d/alsa-utils	amd64
File opened for modification	/etc/init.d/cron	amd64
File opened for modification	/etc/init.d/dbus	amd64
File opened for modification	/etc/init.d/rsync	amd64
File opened for modification	/etc/init.d/ssh	amd64
File opened for modification	/etc/init.d/dns-udp4	amd64
File opened for modification	/etc/init.d/console-setup.sh	amd64
File opened for modification	/etc/init.d/cups	amd64
File opened for modification	/etc/init.d/gdm3	amd64
File opened for modification	/etc/init.d/spice-vdagent	amd64
File opened for modification	/etc/init.d/bluetooth	amd64
File opened for modification	/etc/init.d/unattended-upgrades	amd64
File opened for modification	/etc/init.d/apparmor	amd64
File opened for modification	/etc/init.d/auditd	amd64
File opened for modification	/etc/init.d/keyboard-setup.sh	amd64
File opened for modification	/etc/init.d/openvpn	amd64

Modifies Bash startup script 1 TTPs 3 IoCs

Boot or Logon Autostart Execution

description	ioc	Process
File opened for modification	/etc/profile.d/bash.cfg	amd64
File opened for modification	/etc/profile.d/bash.cfg.sh	amd64
File opened for modification	/etc/profile.d/gateway.sh	amd64

Enumerates kernel/hardware configuration 1 TTPs 2 IoCs

Reads contents of /sys virtual filesystem to enumerate system information.

System Information Discovery

description	ioc	Process
File opened for reading	/sys/kernel/mm/transparent_hugepage/hpage_pmd_size	amd64
File opened for reading	/sys/kernel/mm/transparent_hugepage/hpage_pmd_size	amd64

Reads runtime system information 6 IoCs

Reads data from /proc virtual filesystem.

description	ioc	Process
File opened for reading	/proc/filesystems	systemctl
File opened for reading	/proc/filesystems	systemctl
File opened for reading	/proc/filesystems	systemctl
File opened for reading	/proc/filesystems	systemctl
File opened for reading	/proc/filesystems	mount
File opened for reading	/proc/filesystems	sed

/tmp/cve_2024_6387/amd64
/tmp/cve_2024_6387/amd64
1⤵
- Enumerates kernel/hardware configuration
PID:2471
- /tmp/cve_2024_6387/amd64
  /tmp/cve_2024_6387/amd64 " "
  2⤵
  - Modifies Watchdog functionality
  - Creates/modifies environment variables
  - Modifies init.d
  - Modifies Bash startup script
  - Enumerates kernel/hardware configuration
  PID:2475
- - /usr/sbin/update-rc.d
    update-rc.d dns-udp4 defaults
    3⤵
    PID:2478
  - - /usr/local/sbin/systemctl
      systemctl daemon-reload
      4⤵
      PID:2479
  - - /usr/local/bin/systemctl
      systemctl daemon-reload
      4⤵
      PID:2479
  - - /usr/sbin/systemctl
      systemctl daemon-reload
      4⤵
      PID:2479
  - - /usr/bin/systemctl
      systemctl daemon-reload
      4⤵
      Reads runtime system information
      PID:2479
- - /usr/bin/mount
    mount -o bind /tmp/ /proc/2475
    3⤵
    - Reads runtime system information
    PID:2605
- - /usr/sbin/service
    service cron start
    3⤵
    PID:2606
  - - /usr/bin/basename
      basename /usr/sbin/service
      4⤵
      PID:2607
  - - /usr/bin/basename
      basename /usr/sbin/service
      4⤵
      PID:2608
  - - /usr/bin/systemctl
      systemctl list-unit-files --full "--type=socket"
      4⤵
      Reads runtime system information
      PID:2610
  - - /usr/bin/sed
      sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
      4⤵
      Reads runtime system information
      PID:2611
- - /usr/local/sbin/systemctl
    systemctl start cron.service
    3⤵
    PID:2606
- - /usr/local/bin/systemctl
    systemctl start cron.service
    3⤵
    PID:2606
- - /usr/sbin/systemctl
    systemctl start cron.service
    3⤵
    PID:2606
- - /usr/bin/systemctl
    systemctl start cron.service
    3⤵
    - Reads runtime system information
    PID:2606
- - /usr/bin/systemctl
    systemctl start crond.service
    3⤵
    - Reads runtime system information
    PID:2612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

Hijack Execution Flow

Privilege Escalation

Boot or Logon Autostart Execution

Hijack Execution Flow

Defense Evasion

Hijack Execution Flow

Impair Defenses

Credential Access

Discovery

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

/.mod

Filesize
27B

MD5
f449ef47c4f79ab4ecfe3d11022333d5

SHA1
61ebb524cee5a049cc96bf2cbf339a47dcb1b622

SHA256
503dffa20530956c5f61187e00935f20fe508c35dbb1fcf665b5d28d07d3d704

SHA512
a7015de8bd582dbf7ce6df708a58a725e1b1cd472c6616fbb89a9738c533c042ac39c071ca0cf2fc5df8e56f33bf8a28b1ebd3076570f5028cff773af89031f6

Download Submit
/boot/system.pub

Filesize
5.1MB

MD5
2be087e54204a6c395e05516c53fd579

SHA1
3bdad143cd168a2015aba2053e53f99a24d52ace

SHA256
b60ad90687871ae94e2b33cf2320f523ee614893215335dc5958a6a705488330

SHA512
2ab629a5f9637c7026069e5cc7b473968290b8eb42158dc93c46613d2b4b0ef39149f158b71dda8b2c8bbbebd58ba28cf5437fc0d083fca37deb84423a769db8

Download Submit
/etc/.cfg

Filesize
114B

MD5
d1a60db638a63b203de99c3a0c8a83c7

SHA1
8641579c9ee890b05ccff770dcc91cafe4c8c5af

SHA256
fcb09c1a7ed577eb8202108beeb4835873d058f7b1f474da760f334a9e838a01

SHA512
db26c8363e81dde238bf7658066d313d7a73e4268741af3282d214a8e929590853f1c0d04ac90313a4e949e7b91e5187ef61ded5cee932b2bd7062e542d09349

Download Submit
/etc/init.d/dns-udp4

Filesize
159B

MD5
79f1a0bf1a838c817142e43a5818733a

SHA1
768ed04a737dbdc969165092694e0e977321ca19

SHA256
a3f7d4499b03a14ff2de76122b6a61c221151f59daa6a63a78ae5a805c95a482

SHA512
b6d6f76f3e5b768a6670e05276724b70609259c856ba90ad34f8a782ac40134b9cf5cdabebb4aa55f076a786cedf8491adda9835f9d4aee90bd1820a45b2fbce

Download Submit
/etc/profile.d/gateway.sh

Filesize
4KB

MD5
4112c36725ae465f31485ef9fa0d132d

SHA1
9eafc2693ebbf829390bc5f53639cb253eae9e9e

SHA256
f530cd599d2505c40f29bd284ce61bc7227f0579ff88160ab72a00a3ddfe0f21

SHA512
dcb6f4a6d592d0f8f766e39dfa5bc5b8eb52a1924c5287ed64a5fefeca344cbb4c48a596e1335b30757d30918c90d439ad453c22b62216953f44349c153a348b

Download Submit