ccfcc43527f5ad394dfe3192ebf0dad443a953b9ac7eb7f3bc899e7361d354c3

Analysis

max time kernel
149s
max time network
148s
platform
debian-9_armhf
resource
debian9-armhf-20240418-en
resource tags

arch:armhfimage:debian9-armhf-20240418-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
submitted
09/06/2025, 10:01

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General

Target
arm926t.elf
Size 469KB
Sample250609-l2j5cadn21
SHA256 ccfcc43527f5ad394dfe3192ebf0dad443a953b9ac7eb7f3bc899e7361d354c3
MD5 a5075f581ab2dc20cfe6e50f8c7513b7
SHA1 14fbf59ad0c519de7ad86305aab9a932170516be
SHA512 94f91769f81469b46c75498646611610313d486f3cd15f22c30f6a62a6e8c868108025af541b7592ef9084f5b215a60e59d13223dc754352ae7de853cb3ec9b1
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
642	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.LFBZFc	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/112/cmdline	configuration
File opened for reading	/proc/269/cmdline	configuration
File opened for reading	/proc/285/cmdline	configuration
File opened for reading	/proc/628/cmdline	configuration
File opened for reading	/proc/641/cmdline	configuration
File opened for reading	/proc/5/cmdline	configuration
File opened for reading	/proc/7/cmdline	configuration
File opened for reading	/proc/16/cmdline	configuration
File opened for reading	/proc/24/cmdline	configuration
File opened for reading	/proc/110/cmdline	configuration
File opened for reading	/proc/218/cmdline	configuration
File opened for reading	/proc/14/cmdline	configuration
File opened for reading	/proc/20/cmdline	configuration
File opened for reading	/proc/646/cmdline	configuration
File opened for reading	/proc/mounts	configuration
File opened for reading	/proc/12/cmdline	configuration
File opened for reading	/proc/81/cmdline	configuration
File opened for reading	/proc/301/cmdline	configuration
File opened for reading	/proc/576/cmdline	configuration
File opened for reading	/proc/639/cmdline	configuration
File opened for reading	/proc/640/cmdline	configuration
File opened for reading	/proc/666/cmdline	configuration
File opened for reading	/proc/26/cmdline	configuration
File opened for reading	/proc/153/cmdline	configuration
File opened for reading	/proc/169/cmdline	configuration
File opened for reading	/proc/596/cmdline	configuration
File opened for reading	/proc/304/cmdline	configuration
File opened for reading	/proc/597/cmdline	configuration
File opened for reading	/proc/filesystems	crontab
File opened for reading	/proc/9/cmdline	configuration
File opened for reading	/proc/19/cmdline	configuration
File opened for reading	/proc/41/cmdline	configuration
File opened for reading	/proc/286/cmdline	configuration
File opened for reading	/proc/592/cmdline	configuration
File opened for reading	/proc/11/cmdline	configuration
File opened for reading	/proc/113/cmdline	configuration
File opened for reading	/proc/145/cmdline	configuration
File opened for reading	/proc/1/cmdline	configuration
File opened for reading	/proc/17/cmdline	configuration
File opened for reading	/proc/23/cmdline	configuration
File opened for reading	/proc/271/cmdline	configuration
File opened for reading	/proc/272/cmdline	configuration
File opened for reading	/proc/320/cmdline	configuration
File opened for reading	/proc/594/cmdline	configuration
File opened for reading	/proc/651/cmdline	configuration
File opened for reading	/proc/filesystems	crontab
File opened for reading	/proc/3/cmdline	configuration
File opened for reading	/proc/13/cmdline	configuration
File opened for reading	/proc/18/cmdline	configuration
File opened for reading	/proc/144/cmdline	configuration
File opened for reading	/proc/635/cmdline	configuration
File opened for reading	/proc/device-tree/model	configuration
File opened for reading	/proc/8/cmdline	configuration
File opened for reading	/proc/22/cmdline	configuration
File opened for reading	/proc/29/cmdline	configuration
File opened for reading	/proc/634/cmdline	configuration
File opened for reading	/proc/315/cmdline	configuration
File opened for reading	/proc/10/cmdline	configuration
File opened for reading	/proc/21/cmdline	configuration
File opened for reading	/proc/42/cmdline	configuration
File opened for reading	/proc/4/cmdline	configuration
File opened for reading	/proc/15/cmdline	configuration
File opened for reading	/proc/28/cmdline	configuration
File opened for reading	/proc/43/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:642
- /bin/sh
  sh -c "crontab -l"
  2⤵
  PID:643
- - /usr/bin/crontab
    crontab -l
    3⤵
    - Reads runtime system information
    PID:644
- /bin/sh
  sh -c "(crontab -l ; echo \"@reboot /root/.sys/configuration\")| crontab -"
  2⤵
  PID:650
- - /usr/bin/crontab
    crontab -
    3⤵
    - Creates/modifies Cron job
    - Reads runtime system information
    PID:653
- - /usr/bin/crontab
    crontab -l
    3⤵
    PID:654

/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:642

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.LFBZFc

Path /var/spool/cron/crontabs/tmp.LFBZFc
Size 208B
SHA256 d9a1a84c8cf02ee256800ec0bf6de09731b16fdb896630e20a8e99cdd7235eff
MD5 473213b18146b5ae02b0752e00461a2f
SHA1 504fcf3fa22d5a6314b76461515ed3b9f51c234c
SHA512 61f54a49a4b5096debe8976256d2ef7b6c74f91fe24d22036e92556e1f91b4c48f9652d9de9b1ae6e88a9ba1aeff72a3d7b7f7cfca7918a7bbee623e7adf97a6
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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