bdbc35721238ef0c38acf962295c36bae59c6472b70bb469439c1c370ce472f6 | Triage

Analysis

max time kernel
148s
max time network
172s
platform
debian-12_armhf
resource
debian12-armhf-20240221-en
resource tags

arch:armhfimage:debian12-armhf-20240221-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
submitted
23-11-2024 18:22

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General

Target

cve_2024_6387/arm6
Size

5.0MB
MD5

f01b45a5bea298b837db3af8c5bad744
SHA1

79ae24874af457cfd95b5c34f95ecf5ab6ececb5
SHA256

77adc73b97c25352eee23fdf52b8b663d606a56a494a2ab1498ba20e7c770327
SHA512

4e13687c78344ffcc17d88a49d00c05bb96cf3e1d2c2bc4026cd3fab2dfcd7ce93cab06241f804ffd5e3ce0407f474738a1a47dde1960e5157bfb1dc2ef2b7c0
SSDEEP

24576:uMNirxGnmSHuvTEkaxEa8C8L9NNtr3Fr4DEO2W37yWRO2FkNeuV7pbifUXHB7tEF:DbXZshQYTIQRXGxBdZMoA7en2Gd

Score

7^/10

defense_evasion discovery persistence privilege_escalation

Malware Config

Signatures

Modifies Watchdog functionality 1 TTPs 2 IoCs

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

defense_evasion

Impair Defenses

Processes:

arm6

description	ioc	Process
File opened for modification	/dev/watchdog	arm6
File opened for modification	/dev/misc/watchdog	arm6

Creates/modifies environment variables 1 TTPs 3 IoCs

Creating/modifying environment variables is a common persistence mechanism.

persistence privilege_escalation defense_evasion

Path Interception by PATH Environment Variable

Processes:

arm6

description	ioc	Process
File opened for modification	/etc/profile.d/gateway.sh	arm6
File opened for modification	/etc/profile.d/bash.cfg	arm6
File opened for modification	/etc/profile.d/bash.cfg.sh	arm6

Modifies init.d 2 TTPs 20 IoCs

Adds/modifies system service, likely for persistence.

Boot or Logon Autostart Execution

RC Scripts

Processes:

arm6

description	ioc	Process
File opened for modification	/etc/init.d/sudo	arm6
File opened for modification	/etc/init.d/dns-udp4	arm6
File opened for modification	/etc/init.d/keyboard-setup.sh	arm6
File opened for modification	/etc/init.d/ssh	arm6
File opened for modification	/etc/init.d/hwclock.sh	arm6
File opened for modification	/etc/init.d/ntpsec	arm6
File opened for modification	/etc/init.d/selinux-autorelabel	arm6
File opened for modification	/etc/init.d/console-setup.sh	arm6
File opened for modification	/etc/init.d/dbus	arm6
File opened for modification	/etc/init.d/auditd	arm6
File opened for modification	/etc/init.d/cron	arm6
File opened for modification	/etc/init.d/exim4	arm6
File opened for modification	/etc/init.d/kmod	arm6
File opened for modification	/etc/init.d/udev	arm6
File opened for modification	/etc/init.d/alsa-utils	arm6
File opened for modification	/etc/init.d/apparmor	arm6
File opened for modification	/etc/init.d/qemu-guest-agent	arm6
File opened for modification	/etc/init.d/x11-common	arm6
File opened for modification	/etc/init.d/networking	arm6
File opened for modification	/etc/init.d/procps	arm6

Modifies Bash startup script 2 TTPs 3 IoCs

Boot or Logon Autostart Execution

Unix Shell Configuration Modification

Processes:

arm6

description	ioc	Process
File opened for modification	/etc/profile.d/bash.cfg	arm6
File opened for modification	/etc/profile.d/bash.cfg.sh	arm6
File opened for modification	/etc/profile.d/gateway.sh	arm6

Enumerates kernel/hardware configuration 1 TTPs 2 IoCs

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

System Information Discovery

Processes:

arm6arm6

description	ioc	Process
File opened for reading	/sys/kernel/mm/transparent_hugepage/hpage_pmd_size	arm6
File opened for reading	/sys/kernel/mm/transparent_hugepage/hpage_pmd_size	arm6

Reads runtime system information 6 IoCs

Reads data from /proc virtual filesystem.

Processes:

systemctlsystemctlsystemctlsystemctlmountsed

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/arm6
/tmp/cve_2024_6387/arm6
1⤵
- Enumerates kernel/hardware configuration
PID:750
- /tmp/cve_2024_6387/arm6
  /tmp/cve_2024_6387/arm6 " "
  2⤵
  - Modifies Watchdog functionality
  - Creates/modifies environment variables
  - Modifies init.d
  - Modifies Bash startup script
  - Enumerates kernel/hardware configuration
  PID:754
- - /usr/sbin/update-rc.d
    update-rc.d dns-udp4 defaults
    3⤵
    PID:761
  - - /usr/local/sbin/systemctl
      systemctl daemon-reload
      4⤵
      PID:763
  - - /usr/local/bin/systemctl
      systemctl daemon-reload
      4⤵
      PID:763
  - - /usr/sbin/systemctl
      systemctl daemon-reload
      4⤵
      PID:763
  - - /usr/bin/systemctl
      systemctl daemon-reload
      4⤵
      Reads runtime system information
      PID:763
- - /usr/bin/mount
    mount -o bind /tmp/ /proc/754
    3⤵
    - Reads runtime system information
    PID:782
- - /usr/sbin/service
    service cron start
    3⤵
    PID:783
  - - /usr/bin/basename
      basename /usr/sbin/service
      4⤵
      PID:784
  - - /usr/bin/basename
      basename /usr/sbin/service
      4⤵
      PID:785
  - - /usr/bin/sed
      sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
      4⤵
      Reads runtime system information
      PID:788
  - - /usr/bin/systemctl
      systemctl list-unit-files --full "--type=socket"
      4⤵
      Reads runtime system information
      PID:787
- - /usr/local/sbin/systemctl
    systemctl start cron.service
    3⤵
    PID:783
- - /usr/local/bin/systemctl
    systemctl start cron.service
    3⤵
    PID:783
- - /usr/sbin/systemctl
    systemctl start cron.service
    3⤵
    PID:783
- - /usr/bin/systemctl
    systemctl start cron.service
    3⤵
    - Reads runtime system information
    PID:783
- - /usr/bin/systemctl
    systemctl start crond.service
    3⤵
    - Reads runtime system information
    PID:791

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

Boot or Logon Initialization Scripts

RC Scripts

Event Triggered Execution

Unix Shell Configuration Modification

Hijack Execution Flow

Path Interception by PATH Environment Variable

Privilege Escalation

Boot or Logon Autostart Execution

Boot or Logon Initialization Scripts

RC Scripts

Event Triggered Execution

Unix Shell Configuration Modification

Hijack Execution Flow

Path Interception by PATH Environment Variable

Defense Evasion

Hijack Execution Flow

Path Interception by PATH Environment Variable

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

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/etc/.cfg

Filesize
57B

MD5
25bfc97b9241077f7ee65c9d5831c0ae

SHA1
4d1e84cfe6f0619642400cbcc77ee008d452f622

SHA256
7e18da2137e9453fd98ed61aa79420a173383b2f7a5fe6538b70fbb560f9b3f6

SHA512
e3686c1fe664e67fc503275c6c0fa831ee43c1b081d8f826a616314505e3f952f98a8697911d1799e3f8c1957cd3a1bb5f888766877e5081b32942a6f2d8bff3

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/etc/.cfg

Filesize
106B

MD5
79fdbb1ceca65b4c5488ffd1b8f86b1f

SHA1
455bf2563054900a8e525c0ad4ae2b2772888dad

SHA256
1ed0823e7d9b4cd37e3b1d50b1c1fd0417e0d2f15ee5ad01672303ad8f28a853

SHA512
98f941dd36433efa566b92c82a75dc315c489921b9fb41f0c74f9eb73d308374b8bf740009e3752f1c190062ae7595fbaee22cfe8a0e4282ee162a074b8ff230

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/etc/init.d/dns-udp4

Filesize
159B

MD5
79f1a0bf1a838c817142e43a5818733a

SHA1
768ed04a737dbdc969165092694e0e977321ca19

SHA256
a3f7d4499b03a14ff2de76122b6a61c221151f59daa6a63a78ae5a805c95a482

SHA512
b6d6f76f3e5b768a6670e05276724b70609259c856ba90ad34f8a782ac40134b9cf5cdabebb4aa55f076a786cedf8491adda9835f9d4aee90bd1820a45b2fbce

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/etc/profile.d/gateway.sh

Filesize
3KB

MD5
47c4f645894eb13aea95f41b2a0b1a75

SHA1
041d8f0fa804eca69e5f47c66f3a6422c3a65b0d

SHA256
0278ddbd1dfb784c22c31f9c527a5c22c10f44a2b60985d1f40c8afe37812cfa

SHA512
0ef394d3a5f04533c1a8fbe8a6bd253081eee15ae4f27b28fdd507199f1b8504026241099aa77312097d8258279971701c82e4a13ddf31dd6fe97956bbc05d93

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