systembc | bbf284e7e60430e7aa64fa92781ed283fd46883831720b959d8c786a42af7711

Analysis

max time kernel
133s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
25-05-2024 21:27

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General

Target

file.exe
Size

662KB
MD5

0dd1f6c2b9bf477115701a1340d8d9a2
SHA1

7b074f54130217609435efe3f45ba38d363dd381
SHA256

bbf284e7e60430e7aa64fa92781ed283fd46883831720b959d8c786a42af7711
SHA512

a3c8bcc7fe527eb2de6a6dd230bca9b4424653c6e251c1113bc27bd8c42cf79e1be1974e20c733e51be38f2c222ee1338257fd86209f2411f86e5f65213206e6
SSDEEP

12288:GubsNSOetfARQAPyGUu7zNubsNSOetfARQAPyGUfT+tkrvdv:GubsnafAPyjSzNubsnafAPyjZrvh

Score

10^/10

systembc trojan

Malware Config

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	work.exe

Executes dropped EXE 4 IoCs

pid	Process
4244	work.exe
4460	pogflaw.exe
4624	wfejcax.exe
4824	wfejcax.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\wfejcax.job	pogflaw.exe
File opened for modification	C:\Windows\Tasks\wfejcax.job	pogflaw.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4460	pogflaw.exe
4460	pogflaw.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4476 wrote to memory of 844	4476	file.exe	84
PID 4476 wrote to memory of 844	4476	file.exe	84
PID 4476 wrote to memory of 844	4476	file.exe	84
PID 844 wrote to memory of 4244	844	cmd.exe	87
PID 844 wrote to memory of 4244	844	cmd.exe	87
PID 844 wrote to memory of 4244	844	cmd.exe	87
PID 4244 wrote to memory of 4460	4244	work.exe	88
PID 4244 wrote to memory of 4460	4244	work.exe	88
PID 4244 wrote to memory of 4460	4244	work.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4476
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:844
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe
    work.exe -priverdD
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:4244
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX1\pogflaw.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX1\pogflaw.exe"
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      PID:4460

C:\ProgramData\xotkb\wfejcax.exe
C:\ProgramData\xotkb\wfejcax.exe start2
1⤵
- Executes dropped EXE
PID:4624

C:\ProgramData\xotkb\wfejcax.exe
C:\ProgramData\xotkb\wfejcax.exe start2
1⤵
- Executes dropped EXE
PID:4824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat

Filesize
35B

MD5
ff59d999beb970447667695ce3273f75

SHA1
316fa09f467ba90ac34a054daf2e92e6e2854ff8

SHA256
065d2b17ad499587dc9de7ee9ecda4938b45da1df388bc72e6627dff220f64d2

SHA512
d5ac72cb065a3cd3cb118a69a2f356314eeed24dcb4880751e1a3683895e66cedc62607967e29f77a0c27adf1c9fe0efd86e804f693f0a63a5b51b0bf0056b5d

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C:\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe

Filesize
335KB

MD5
577cc10d77b4ee44f8613fc7df186048

SHA1
1d188a807f9a7c55f62ccd4820fe8b89fb8d9e8b

SHA256
e871608d80293f723b1f44f465054f8a6528c2b0354435b9360aeb849a29701c

SHA512
6183b03eaeb88e8ea1ef2ccedb65cbd04fc05c028ce8e2f9e0aed6636717e1e7c9994a8fb9cf4ebf36e277618db7f612a2af4557749b1f6ef6c2b115837618fa

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C:\Users\Admin\AppData\Local\Temp\RarSFX1\pogflaw.exe

Filesize
16KB

MD5
4f01c3d7439dde153ff0110a26e2a71c

SHA1
40d7203ad4e1fd40e13a56e6f747ee480740873c

SHA256
cfb1fd0adf528fcf14647cf3fcd85fb7e4fddd2167b36f9e8b2424b62453df28

SHA512
513d09b80e1ac80813bc691e71cdf5348478157350e43b9daed27741b7f5a7a16b2ae4d88ee9951395747c7f2a93ff0c1f2c3753a9e3bad2e2607767a1e3d28e

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