systembc | 6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a

Analysis

max time kernel
130s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 03:42

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General

Target
file.exe
Size 613KB
Sample240602-d9b5psac76
SHA256 6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a
MD5 a1ad149a4d2a04338fd9a0d902410daf
SHA1 d43db08458ea4a81cd32926a402d8a5d12728a2f
SHA512 cef534d0233f47048d6b80c49c4b44570fc436b90904ea84f03c24106ecb785802c424e1241ebd70b9a85f09b77f7c0322927c57a9d65959da4a425149e04128
SSDEEP 12288:mhqxSLo5C1Ps4Xh/P58lhqxSLo5C1Ps4XhAjN81Ve:mHLmCiIhXyHLmCiIhocVe
MD5 SHA1 SHA512 SSDEEP

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	work.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	file.exe

Executes dropped EXE 4 IoCs

pid	Process
4960	work.exe
4872	lgors.exe
1220	teul.exe
2292	teul.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\teul.job	lgors.exe
File opened for modification	C:\Windows\Tasks\teul.job	lgors.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
4872	lgors.exe
4872	lgors.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 4572	1796	file.exe	83
PID 1796 wrote to memory of 4572	1796	file.exe	83
PID 1796 wrote to memory of 4572	1796	file.exe	83
PID 4572 wrote to memory of 4960	4572	cmd.exe	86
PID 4572 wrote to memory of 4960	4572	cmd.exe	86
PID 4572 wrote to memory of 4960	4572	cmd.exe	86
PID 4960 wrote to memory of 4872	4960	work.exe	87
PID 4960 wrote to memory of 4872	4960	work.exe	87
PID 4960 wrote to memory of 4872	4960	work.exe	87

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:1796
- 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:4572
- - 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:4960
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX1\lgors.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX1\lgors.exe"
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      PID:4872

C:\ProgramData\pcph\teul.exe
C:\ProgramData\pcph\teul.exe start2
1⤵
- Executes dropped EXE
PID:1220

C:\ProgramData\pcph\teul.exe
C:\ProgramData\pcph\teul.exe start2
1⤵
- Executes dropped EXE
PID:2292

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

Replay Monitor

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Downloads

1.bat

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat
Size 35B
SHA256 065d2b17ad499587dc9de7ee9ecda4938b45da1df388bc72e6627dff220f64d2
MD5 ff59d999beb970447667695ce3273f75
SHA1 316fa09f467ba90ac34a054daf2e92e6e2854ff8
SHA512 d5ac72cb065a3cd3cb118a69a2f356314eeed24dcb4880751e1a3683895e66cedc62607967e29f77a0c27adf1c9fe0efd86e804f693f0a63a5b51b0bf0056b5d
MD5 SHA1 SHA512

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work.exe

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe
Size 294KB
SHA256 e3873f55cd848b37d6897b3851a21aa6c17b3d74d94ea2adcd076cf3eb3f4121
MD5 372b142bdf88cc3175d31b48a650955d
SHA1 515f9a1e5c954cd849bacd19291534c50201ac49
SHA512 cff5c69e361d4975f6b10000d5d53ccd0853503f585842ac3422131cf8313195ab8720b65e291c27fc12875b584129069b8548823774320ded37403cc64d8d11
SSDEEP 6144:0dRVzSkGTxSLD8uq5CaOPs47bhqUdKgoNfk1VHO:0hqxSLo5C1Ps4XhAjN81Vu
MD5 SHA1 SHA512 SSDEEP

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lgors.exe

Path C:\Users\Admin\AppData\Local\Temp\RarSFX1\lgors.exe
Size 16KB
SHA256 cfb1fd0adf528fcf14647cf3fcd85fb7e4fddd2167b36f9e8b2424b62453df28
MD5 4f01c3d7439dde153ff0110a26e2a71c
SHA1 40d7203ad4e1fd40e13a56e6f747ee480740873c
SHA512 513d09b80e1ac80813bc691e71cdf5348478157350e43b9daed27741b7f5a7a16b2ae4d88ee9951395747c7f2a93ff0c1f2c3753a9e3bad2e2607767a1e3d28e
SSDEEP 384:rC+AHNZw/WnlrobdglGbLMoy+yG+yir1dV:r0gklrydgQP1yO67V
MD5 SHA1 SHA512 SSDEEP

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