6563fa72a27c49aac8d067a30a9e5c1fa60568ab4a7aaf72a3743f414e03ccfa

Analysis

max time kernel
149s
max time network
152s
platform
debian-12_armhf
resource
debian12-armhf-20250610-en
resource tags

arch:armhfimage:debian12-armhf-20250610-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
submitted
16/06/2025, 11:14

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General

Target
arm926t.elf
Size 469KB
Sample250616-nb5dpswrv9
SHA256 6563fa72a27c49aac8d067a30a9e5c1fa60568ab4a7aaf72a3743f414e03ccfa
MD5 df7e75cd6b7711b89819efac56ef7707
SHA1 3f8c72f41b66dc9d1a0561e20f5f1dab75de3329
SHA512 b047e9f54bb807f6a587ad0263bb0b55136ec6c0e2a8cdf6cd97b84692a119100b2083f3e663e75be0482d4b59390b602def7148b44a23fba4e537737b7ec416
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
779	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.diSyQM	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/30/cmdline	configuration
File opened for reading	/proc/320/cmdline	configuration
File opened for reading	/proc/730/cmdline	configuration
File opened for reading	/proc/17/cmdline	configuration
File opened for reading	/proc/18/cmdline	configuration
File opened for reading	/proc/631/cmdline	configuration
File opened for reading	/proc/734/cmdline	configuration
File opened for reading	/proc/46/cmdline	configuration
File opened for reading	/proc/198/cmdline	configuration
File opened for reading	/proc/781/cmdline	configuration
File opened for reading	/proc/800/cmdline	configuration
File opened for reading	/proc/5/cmdline	configuration
File opened for reading	/proc/26/cmdline	configuration
File opened for reading	/proc/32/cmdline	configuration
File opened for reading	/proc/42/cmdline	configuration
File opened for reading	/proc/56/cmdline	configuration
File opened for reading	/proc/193/cmdline	configuration
File opened for reading	/proc/308/cmdline	configuration
File opened for reading	/proc/647/cmdline	configuration
File opened for reading	/proc/10/cmdline	configuration
File opened for reading	/proc/28/cmdline	configuration
File opened for reading	/proc/33/cmdline	configuration
File opened for reading	/proc/658/cmdline	configuration
File opened for reading	/proc/796/cmdline	configuration
File opened for reading	/proc/807/cmdline	configuration
File opened for reading	/proc/7/cmdline	configuration
File opened for reading	/proc/210/cmdline	configuration
File opened for reading	/proc/254/cmdline	configuration
File opened for reading	/proc/355/cmdline	configuration
File opened for reading	/proc/723/cmdline	configuration
File opened for reading	/proc/11/cmdline	configuration
File opened for reading	/proc/1/cmdline	configuration
File opened for reading	/proc/2/cmdline	configuration
File opened for reading	/proc/45/cmdline	configuration
File opened for reading	/proc/761/cmdline	configuration
File opened for reading	/proc/16/cmdline	configuration
File opened for reading	/proc/73/cmdline	configuration
File opened for reading	/proc/334/cmdline	configuration
File opened for reading	/proc/device-tree/model	configuration
File opened for reading	/proc/57/cmdline	configuration
File opened for reading	/proc/775/cmdline	configuration
File opened for reading	/proc/6/cmdline	configuration
File opened for reading	/proc/12/cmdline	configuration
File opened for reading	/proc/35/cmdline	configuration
File opened for reading	/proc/44/cmdline	configuration
File opened for reading	/proc/142/cmdline	configuration
File opened for reading	/proc/323/cmdline	configuration
File opened for reading	/proc/24/cmdline	configuration
File opened for reading	/proc/29/cmdline	configuration
File opened for reading	/proc/31/cmdline	configuration
File opened for reading	/proc/34/cmdline	configuration
File opened for reading	/proc/773/cmdline	configuration
File opened for reading	/proc/14/cmdline	configuration
File opened for reading	/proc/331/cmdline	configuration
File opened for reading	/proc/367/cmdline	configuration
File opened for reading	/proc/8/cmdline	configuration
File opened for reading	/proc/9/cmdline	configuration
File opened for reading	/proc/13/cmdline	configuration
File opened for reading	/proc/20/cmdline	configuration
File opened for reading	/proc/21/cmdline	configuration
File opened for reading	/proc/25/cmdline	configuration
File opened for reading	/proc/36/cmdline	configuration
File opened for reading	/proc/364/cmdline	configuration
File opened for reading	/proc/19/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:779
- /bin/sh
  sh -c "crontab -l"
  2⤵
  PID:783
- - /usr/bin/crontab
    crontab -l
    3⤵
    PID:786
- /bin/sh
  sh -c "(crontab -l ; echo \"@reboot /root/.sys/configuration\")| crontab -"
  2⤵
  PID:788
- - /usr/bin/crontab
    crontab -l
    3⤵
    PID:792
- - /usr/bin/crontab
    crontab -
    3⤵
    - Creates/modifies Cron job
    PID:791

/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:779

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.diSyQM

Path /var/spool/cron/crontabs/tmp.diSyQM
Size 208B
SHA256 d83f06b1fd31215a6723eb3b2ccd4699954eed427427f6ded985c8ffe015c0d8
MD5 e0e60803adca38126b9eb8fc342d8a57
SHA1 c0da04887296adba5cc3101bd00a4121343068b8
SHA512 336c53772ea0ab56b03773213341fffb593b0009556d223e025c0a8bebfccd483a21b935d457c7cc59d585c11cf4ccddd9835545a8e0197dc00053bd7432d967
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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