2e7a40e0a5319cb57392e9bbe8b04e0bbd09c964e206b66da3cf544bbf717102

Analysis

max time kernel
149s
max time network
149s
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
05/07/2025, 16:49

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General

Target
arm926t.elf
Size 469KB
Sample250705-vbvb3a1qw8
SHA256 2e7a40e0a5319cb57392e9bbe8b04e0bbd09c964e206b66da3cf544bbf717102
MD5 7902f75e4136f71e06fcb8864f1800d9
SHA1 21deb71210f0363e1f761b70a4e0480b74f62dc0
SHA512 ad6b4f76786350784f9424c16567d6ddc729483f6f023400377fb7f2eb331a3884b3a0fac90fd08ebbea20e8cd215f998c85ab00f8315cdc5023fb1bf08f880e
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
777	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.rdWXbw	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/51/cmdline	configuration
File opened for reading	/proc/773/cmdline	configuration
File opened for reading	/proc/330/cmdline	configuration
File opened for reading	/proc/26/cmdline	configuration
File opened for reading	/proc/14/cmdline	configuration
File opened for reading	/proc/17/cmdline	configuration
File opened for reading	/proc/33/cmdline	configuration
File opened for reading	/proc/257/cmdline	configuration
File opened for reading	/proc/641/cmdline	configuration
File opened for reading	/proc/772/cmdline	configuration
File opened for reading	/proc/778/cmdline	configuration
File opened for reading	/proc/25/cmdline	configuration
File opened for reading	/proc/5/cmdline	configuration
File opened for reading	/proc/6/cmdline	configuration
File opened for reading	/proc/142/cmdline	configuration
File opened for reading	/proc/360/cmdline	configuration
File opened for reading	/proc/32/cmdline	configuration
File opened for reading	/proc/143/cmdline	configuration
File opened for reading	/proc/321/cmdline	configuration
File opened for reading	/proc/788/cmdline	configuration
File opened for reading	/proc/27/cmdline	configuration
File opened for reading	/proc/30/cmdline	configuration
File opened for reading	/proc/57/cmdline	configuration
File opened for reading	/proc/193/cmdline	configuration
File opened for reading	/proc/309/cmdline	configuration
File opened for reading	/proc/15/cmdline	configuration
File opened for reading	/proc/760/cmdline	configuration
File opened for reading	/proc/4/cmdline	configuration
File opened for reading	/proc/10/cmdline	configuration
File opened for reading	/proc/73/cmdline	configuration
File opened for reading	/proc/9/cmdline	configuration
File opened for reading	/proc/29/cmdline	configuration
File opened for reading	/proc/319/cmdline	configuration
File opened for reading	/proc/11/cmdline	configuration
File opened for reading	/proc/678/cmdline	configuration
File opened for reading	/proc/729/cmdline	configuration
File opened for reading	/proc/2/cmdline	configuration
File opened for reading	/proc/13/cmdline	configuration
File opened for reading	/proc/16/cmdline	configuration
File opened for reading	/proc/623/cmdline	configuration
File opened for reading	/proc/3/cmdline	configuration
File opened for reading	/proc/21/cmdline	configuration
File opened for reading	/proc/34/cmdline	configuration
File opened for reading	/proc/198/cmdline	configuration
File opened for reading	/proc/403/cmdline	configuration
File opened for reading	/proc/24/cmdline	configuration
File opened for reading	/proc/211/cmdline	configuration
File opened for reading	/proc/640/cmdline	configuration
File opened for reading	/proc/1/cmdline	configuration
File opened for reading	/proc/8/cmdline	configuration
File opened for reading	/proc/22/cmdline	configuration
File opened for reading	/proc/208/cmdline	configuration
File opened for reading	/proc/334/cmdline	configuration
File opened for reading	/proc/363/cmdline	configuration
File opened for reading	/proc/368/cmdline	configuration
File opened for reading	/proc/672/cmdline	configuration
File opened for reading	/proc/23/cmdline	configuration
File opened for reading	/proc/mounts	configuration
File opened for reading	/proc/device-tree/model	configuration
File opened for reading	/proc/31/cmdline	configuration
File opened for reading	/proc/36/cmdline	configuration
File opened for reading	/proc/42/cmdline	configuration
File opened for reading	/proc/44/cmdline	configuration
File opened for reading	/proc/46/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:777
- /bin/sh
  sh -c "crontab -l"
  2⤵
  PID:783
- - /usr/bin/crontab
    crontab -l
    3⤵
    PID:787
- /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:796
- - /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:777

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.rdWXbw

Path /var/spool/cron/crontabs/tmp.rdWXbw
Size 208B
SHA256 bd25e985012e02afb128301cd6ab76e2e7efeda508adb8d085b381faa0d99f19
MD5 61acd03e0b3ed68f8347ec30e65b1080
SHA1 4226551e5a52384d0028c8eee076a29db777a07e
SHA512 c7af4f2318f514649311532026dda5b1652cd842cf0ae0e8d677a05948abaeb857390b202a1ed8ed9494213f31dc36015ab8d90d27119dd7b4e7f5b5dc67fee8
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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