724dcffaef4ff8c3d9e39ebc1915a7b0671eb2a90cdd16603c1f44a01ad906f3

Analysis

max time kernel
149s
max time network
150s
platform
debian-9_armhf
resource
debian9-armhf-20250619-en
resource tags

arch:armhfimage:debian9-armhf-20250619-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
submitted
12/07/2025, 00:15

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General

Target
arm926t.elf
Size 469KB
Sample250712-aj3cesak2v
SHA256 724dcffaef4ff8c3d9e39ebc1915a7b0671eb2a90cdd16603c1f44a01ad906f3
MD5 61a2ef04787d2cc294702594d7691561
SHA1 5213b66808e977754d2a7a6d45936727b1c1bf5a
SHA512 0d0a1bc409256464a632c4a62201bbc40439ba33496a09e63dc74352d490db9d8287bf3adb351fede4bd3247bce7a1206b8fe25f9bee18d5a284b78b542058ce
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
639	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.ewgisV	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/class/dmi/id/board_name	configuration
File opened for reading	/sys/class/dmi/id/product_uuid	configuration
File opened for reading	/sys/devices/virtual/dmi/id/board_name	configuration
File opened for reading	/sys/devices/virtual/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/279/cmdline	configuration
File opened for reading	/proc/filesystems	crontab
File opened for reading	/proc/297/cmdline	configuration
File opened for reading	/proc/584/cmdline	configuration
File opened for reading	/proc/7/cmdline	configuration
File opened for reading	/proc/13/cmdline	configuration
File opened for reading	/proc/43/cmdline	configuration
File opened for reading	/proc/564/cmdline	configuration
File opened for reading	/proc/578/cmdline	configuration
File opened for reading	/proc/635/cmdline	configuration
File opened for reading	/proc/636/cmdline	configuration
File opened for reading	/proc/183/cmdline	configuration
File opened for reading	/proc/12/cmdline	configuration
File opened for reading	/proc/23/cmdline	configuration
File opened for reading	/proc/27/cmdline	configuration
File opened for reading	/proc/644/cmdline	configuration
File opened for reading	/proc/25/cmdline	configuration
File opened for reading	/proc/29/cmdline	configuration
File opened for reading	/proc/42/cmdline	configuration
File opened for reading	/proc/97/cmdline	configuration
File opened for reading	/proc/167/cmdline	configuration
File opened for reading	/proc/device-tree/model	configuration
File opened for reading	/proc/20/cmdline	configuration
File opened for reading	/proc/21/cmdline	configuration
File opened for reading	/proc/661/cmdline	configuration
File opened for reading	/proc/mounts	configuration
File opened for reading	/proc/8/cmdline	configuration
File opened for reading	/proc/11/cmdline	configuration
File opened for reading	/proc/17/cmdline	configuration
File opened for reading	/proc/24/cmdline	configuration
File opened for reading	/proc/106/cmdline	configuration
File opened for reading	/proc/318/cmdline	configuration
File opened for reading	/proc/637/cmdline	configuration
File opened for reading	/proc/18/cmdline	configuration
File opened for reading	/proc/156/cmdline	configuration
File opened for reading	/proc/281/cmdline	configuration
File opened for reading	/proc/302/cmdline	configuration
File opened for reading	/proc/586/cmdline	configuration
File opened for reading	/proc/671/cmdline	configuration
File opened for reading	/proc/9/cmdline	configuration
File opened for reading	/proc/19/cmdline	configuration
File opened for reading	/proc/28/cmdline	configuration
File opened for reading	/proc/299/cmdline	configuration
File opened for reading	/proc/321/cmdline	configuration
File opened for reading	/proc/630/cmdline	configuration
File opened for reading	/proc/290/cmdline	configuration
File opened for reading	/proc/308/cmdline	configuration
File opened for reading	/proc/631/cmdline	configuration
File opened for reading	/proc/145/cmdline	configuration
File opened for reading	/proc/10/cmdline	configuration
File opened for reading	/proc/14/cmdline	configuration
File opened for reading	/proc/107/cmdline	configuration
File opened for reading	/proc/133/cmdline	configuration
File opened for reading	/proc/136/cmdline	configuration
File opened for reading	/proc/2/cmdline	configuration
File opened for reading	/proc/3/cmdline	configuration
File opened for reading	/proc/4/cmdline	configuration
File opened for reading	/proc/5/cmdline	configuration
File opened for reading	/proc/16/cmdline	configuration
File opened for reading	/proc/22/cmdline	configuration
File opened for reading	/proc/75/cmdline	configuration
File opened for reading	/proc/filesystems	crontab
File opened for reading	/proc/26/cmdline	configuration
File opened for reading	/proc/41/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:639
- /bin/sh
  sh -c "crontab -l"
  2⤵
  PID:641
- - /usr/bin/crontab
    crontab -l
    3⤵
    PID:642
- /bin/sh
  sh -c "(crontab -l ; echo \"@reboot /root/.sys/configuration\")| crontab -"
  2⤵
  PID:647
- - /usr/bin/crontab
    crontab -
    3⤵
    - Creates/modifies Cron job
    - Reads runtime system information
    PID:650
- - /usr/bin/crontab
    crontab -l
    3⤵
    - Reads runtime system information
    PID:652

/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:639

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.ewgisV

Path /var/spool/cron/crontabs/tmp.ewgisV
Size 208B
SHA256 5dcf802bcbf199254dbf97ac656be8bc9a4b993aaa44f71a6321fb8157362383
MD5 8e3147f7de5a7fde618e0a1f21fe09e7
SHA1 14f886ac8f8a29f094b05e967194f698dd205f47
SHA512 3d170345262f953f6b37a8a6d87e66e9cea53220e26bdda06b8ed3a38eb12422f257447ca0459186f3c0b5eb331a06c93ec5146d0569787aa2402cb19426bfb0
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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