36d4fbfdb5851c18832cbf86fa5dbedd0b73801aa8a6b897eee4a49a92a8a51c

Analysis

max time kernel
149s
max time network
151s
platform
debian-12_armhf
resource
debian12-armhf-20250619-en
resource tags

arch:armhfimage:debian12-armhf-20250619-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
submitted
29/06/2025, 04:25

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General

Target
arm926t.elf
Size 469KB
Sample250629-e2efjafk61
SHA256 36d4fbfdb5851c18832cbf86fa5dbedd0b73801aa8a6b897eee4a49a92a8a51c
MD5 bd464e1dfba5ff25f2e6adfdfa6fa743
SHA1 335ed69ef06b917aa4cee1a59bb48729579dd611
SHA512 a37f1c4fd658fc72e9e84bbc0ae8a3cd7c5d1a192b781f11674f636635b1e97fd7dbbf8f66cd949820ad98c36c3919cef258ffc8b69fed72e6937c2879c514ea
SSDEEP 12288:ndLGtVtlmIHk6Rtx02O6R+9X8C5SGEzf:pGntlzJx02O6E9X8XG
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

antivm defense_evasion discovery execution persistence privilege_escalation

Malware Config

Signatures

Renames itself 1 IoCs

pid	Process
782	arm926t.elf

Checks hardware identifiers (DMI) 1 TTPs 2 IoCs

Checks DMI information which indicate if the system is a virtual machine.

antivm

System Checks

T1497.001

description	ioc	Process
File opened for reading	/sys/devices/virtual/dmi/id/board_vendor	configuration
File opened for reading	/sys/class/dmi/id/board_vendor	configuration

Creates/modifies Cron job 1 TTPs 1 IoCs

Cron allows running tasks on a schedule, and is commonly used for malware persistence.

execution persistence privilege_escalation

Cron

T1053.003

description	ioc	Process
File opened for modification	/var/spool/cron/crontabs/tmp.tOWOPu	crontab

Enumerates running processes
Discovers information about currently running processes on the system

Reads MAC address of network interface 2 TTPs 1 IoCs

Fetches the MAC address of active network interfaces. May be used to detect known values for hypervisors.

defense_evasion discovery

System Network Connections Discovery

T1049

Wi-Fi Discovery

T1016.002

description	ioc	Process
File opened for reading	/sys/class/net/eth0/address	configuration

Reads hardware information 1 TTPs 4 IoCs

Accesses system info like serial numbers, manufacturer names etc.

discovery

System Information Discovery

T1082

description	ioc	Process
File opened for reading	/sys/devices/virtual/dmi/id/board_name	configuration
File opened for reading	/sys/devices/virtual/dmi/id/product_uuid	configuration
File opened for reading	/sys/class/dmi/id/board_name	configuration
File opened for reading	/sys/class/dmi/id/product_uuid	configuration

Checks CPU configuration 1 TTPs 1 IoCs

Checks CPU information which indicate if the system is a virtual machine.

antivm

System Checks

T1497.001

description	ioc	Process
File opened for reading	/proc/cpuinfo	configuration

Enumerates kernel/hardware configuration 1 TTPs 1 IoCs

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

discovery

System Information Discovery

T1082

description	ioc	Process
File opened for reading	/sys/class/net	configuration

Reads runtime system information 64 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/57/cmdline	configuration
File opened for reading	/proc/73/cmdline	configuration
File opened for reading	/proc/317/cmdline	configuration
File opened for reading	/proc/777/cmdline	configuration
File opened for reading	/proc/1/cmdline	configuration
File opened for reading	/proc/9/cmdline	configuration
File opened for reading	/proc/25/cmdline	configuration
File opened for reading	/proc/33/cmdline	configuration
File opened for reading	/proc/44/cmdline	configuration
File opened for reading	/proc/46/cmdline	configuration
File opened for reading	/proc/142/cmdline	configuration
File opened for reading	/proc/351/cmdline	configuration
File opened for reading	/proc/732/cmdline	configuration
File opened for reading	/proc/759/cmdline	configuration
File opened for reading	/proc/761/cmdline	configuration
File opened for reading	/proc/778/cmdline	configuration
File opened for reading	/proc/17/cmdline	configuration
File opened for reading	/proc/28/cmdline	configuration
File opened for reading	/proc/31/cmdline	configuration
File opened for reading	/proc/35/cmdline	configuration
File opened for reading	/proc/51/cmdline	configuration
File opened for reading	/proc/340/cmdline	configuration
File opened for reading	/proc/728/cmdline	configuration
File opened for reading	/proc/775/cmdline	configuration
File opened for reading	/proc/mounts	configuration
File opened for reading	/proc/8/cmdline	configuration
File opened for reading	/proc/14/cmdline	configuration
File opened for reading	/proc/16/cmdline	configuration
File opened for reading	/proc/332/cmdline	configuration
File opened for reading	/proc/622/cmdline	configuration
File opened for reading	/proc/12/cmdline	configuration
File opened for reading	/proc/18/cmdline	configuration
File opened for reading	/proc/36/cmdline	configuration
File opened for reading	/proc/218/cmdline	configuration
File opened for reading	/proc/6/cmdline	configuration
File opened for reading	/proc/11/cmdline	configuration
File opened for reading	/proc/21/cmdline	configuration
File opened for reading	/proc/30/cmdline	configuration
File opened for reading	/proc/200/cmdline	configuration
File opened for reading	/proc/640/cmdline	configuration
File opened for reading	/proc/5/cmdline	configuration
File opened for reading	/proc/7/cmdline	configuration
File opened for reading	/proc/641/cmdline	configuration
File opened for reading	/proc/13/cmdline	configuration
File opened for reading	/proc/15/cmdline	configuration
File opened for reading	/proc/34/cmdline	configuration
File opened for reading	/proc/198/cmdline	configuration
File opened for reading	/proc/315/cmdline	configuration
File opened for reading	/proc/784/cmdline	configuration
File opened for reading	/proc/795/cmdline	configuration
File opened for reading	/proc/4/cmdline	configuration
File opened for reading	/proc/22/cmdline	configuration
File opened for reading	/proc/42/cmdline	configuration
File opened for reading	/proc/45/cmdline	configuration
File opened for reading	/proc/193/cmdline	configuration
File opened for reading	/proc/316/cmdline	configuration
File opened for reading	/proc/356/cmdline	configuration
File opened for reading	/proc/2/cmdline	configuration
File opened for reading	/proc/24/cmdline	configuration
File opened for reading	/proc/27/cmdline	configuration
File opened for reading	/proc/29/cmdline	configuration
File opened for reading	/proc/663/cmdline	configuration
File opened for reading	/proc/32/cmdline	configuration
File opened for reading	/proc/56/cmdline	configuration

Writes file to tmp directory 1 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/root1086f3d	configuration

/tmp/arm926t.elf
/tmp/arm926t.elf
1⤵
- Renames itself
PID:782
- /bin/sh
  sh -c "crontab -l"
  2⤵
  PID:787
- - /usr/bin/crontab
    crontab -l
    3⤵
    PID:788
- /bin/sh
  sh -c "(crontab -l ; echo \"@reboot /root/.sys/configuration\")| crontab -"
  2⤵
  PID:791
- - /usr/bin/crontab
    crontab -
    3⤵
    - Creates/modifies Cron job
    PID:794
- - /usr/bin/crontab
    crontab -l
    3⤵
    PID:797

/root/.sys/configuration
/tmp/arm926t.elf
1⤵
- Checks hardware identifiers (DMI)
- Reads MAC address of network interface
- Reads hardware information
- Checks CPU configuration
- Enumerates kernel/hardware configuration
- Reads runtime system information
- Writes file to tmp directory
PID:782

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Cron

T1053.003

Persistence

Scheduled Task/Job

T1053

Cron

T1053.003

Privilege Escalation

Scheduled Task/Job

T1053

Cron

T1053.003

Defense Evasion

Virtualization/Sandbox Evasion

T1497

System Checks

T1497.001

Credential Access

Discovery

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Wi-Fi Discovery

T1016.002

System Network Connections Discovery

T1049

Virtualization/Sandbox Evasion

T1497

System Checks

T1497.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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tmp.tOWOPu

Path /var/spool/cron/crontabs/tmp.tOWOPu
Size 208B
SHA256 bc1875b9a55ef33a15d730343ce7dea733e8e6f9e2ead9efc7d28f097f0b1da8
MD5 52b02cfcfd65ac8f024ab43628ce9cdc
SHA1 654c3bc18bc83bc42a2846663890023a0cb49273
SHA512 e9dacaf920d8f2583b0211663b541358fca212d865c63b46c271b7e07cb721bd48879583b0c9eb74f825703a6e2def77410ec352253ec4594a5d03c2fa773794
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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