systembc | 6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a

General

Target

6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.exe
Size

613KB
MD5

a1ad149a4d2a04338fd9a0d902410daf
SHA1

d43db08458ea4a81cd32926a402d8a5d12728a2f
SHA256

6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a
SHA512

cef534d0233f47048d6b80c49c4b44570fc436b90904ea84f03c24106ecb785802c424e1241ebd70b9a85f09b77f7c0322927c57a9d65959da4a425149e04128
SSDEEP

12288:mhqxSLo5C1Ps4Xh/P58lhqxSLo5C1Ps4XhAjN81Ve:mHLmCiIhXyHLmCiIhocVe

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

cobusabobus.cam:4001

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 4 IoCs

Processes:

work.exelgors.exerluof.exerluof.exe

pid process

2660 work.exe
2668 lgors.exe
2588 rluof.exe
2488 rluof.exe
Loads dropped DLL 5 IoCs

Processes:

cmd.exework.exe

pid process

2812 cmd.exe
2660 work.exe
2660 work.exe
2660 work.exe
2660 work.exe
Drops file in Windows directory 2 IoCs

Processes:

lgors.exe

description ioc process

File created C:\Windows\Tasks\rluof.job lgors.exe
File opened for modification C:\Windows\Tasks\rluof.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 1 IoCs

Processes:

lgors.exe

pid process

2668 lgors.exe

pid	process
2660	work.exe
2668	lgors.exe
2588	rluof.exe
2488	rluof.exe

pid	process
2812	cmd.exe
2660	work.exe
2660	work.exe
2660	work.exe
2660	work.exe

description	ioc	process
File created	C:\Windows\Tasks\rluof.job	lgors.exe
File opened for modification	C:\Windows\Tasks\rluof.job	lgors.exe

pid	process
2668	lgors.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.execmd.exework.exetaskeng.exe

description	pid	process	target process
PID 1276 wrote to memory of 2812	1276	6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.exe	cmd.exe
PID 1276 wrote to memory of 2812	1276	6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.exe	cmd.exe
PID 1276 wrote to memory of 2812	1276	6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.exe	cmd.exe
PID 1276 wrote to memory of 2812	1276	6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.exe	cmd.exe
PID 2812 wrote to memory of 2660	2812	cmd.exe	work.exe
PID 2812 wrote to memory of 2660	2812	cmd.exe	work.exe
PID 2812 wrote to memory of 2660	2812	cmd.exe	work.exe
PID 2812 wrote to memory of 2660	2812	cmd.exe	work.exe
PID 2660 wrote to memory of 2668	2660	work.exe	lgors.exe
PID 2660 wrote to memory of 2668	2660	work.exe	lgors.exe
PID 2660 wrote to memory of 2668	2660	work.exe	lgors.exe
PID 2660 wrote to memory of 2668	2660	work.exe	lgors.exe
PID 2516 wrote to memory of 2588	2516	taskeng.exe	rluof.exe
PID 2516 wrote to memory of 2588	2516	taskeng.exe	rluof.exe
PID 2516 wrote to memory of 2588	2516	taskeng.exe	rluof.exe
PID 2516 wrote to memory of 2588	2516	taskeng.exe	rluof.exe
PID 2516 wrote to memory of 2488	2516	taskeng.exe	rluof.exe
PID 2516 wrote to memory of 2488	2516	taskeng.exe	rluof.exe
PID 2516 wrote to memory of 2488	2516	taskeng.exe	rluof.exe
PID 2516 wrote to memory of 2488	2516	taskeng.exe	rluof.exe

C:\Users\Admin\AppData\Local\Temp\6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.exe
"C:\Users\Admin\AppData\Local\Temp\6e9f1c1298419230dbc24cfe76a8d64c8094e9d1335a0cef567042b3250e565a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1276
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat" "
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2812
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe
    work.exe -priverdD
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2660
  - - 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:2668

C:\Windows\system32\taskeng.exe
taskeng.exe {71351231-EBE3-4562-86D0-0A262D5A394E} S-1-5-21-2737914667-933161113-3798636211-1000:PUMARTNR\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2516
- C:\ProgramData\cdef\rluof.exe
  C:\ProgramData\cdef\rluof.exe start2
  2⤵
  - Executes dropped EXE
  PID:2588
- C:\ProgramData\cdef\rluof.exe
  C:\ProgramData\cdef\rluof.exe start2
  2⤵
  - Executes dropped EXE
  PID:2488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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
294KB

MD5
372b142bdf88cc3175d31b48a650955d

SHA1
515f9a1e5c954cd849bacd19291534c50201ac49

SHA256
e3873f55cd848b37d6897b3851a21aa6c17b3d74d94ea2adcd076cf3eb3f4121

SHA512
cff5c69e361d4975f6b10000d5d53ccd0853503f585842ac3422131cf8313195ab8720b65e291c27fc12875b584129069b8548823774320ded37403cc64d8d11

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\Users\Admin\AppData\Local\Temp\RarSFX1\lgors.exe

Filesize
16KB

MD5
4f01c3d7439dde153ff0110a26e2a71c

SHA1
40d7203ad4e1fd40e13a56e6f747ee480740873c

SHA256
cfb1fd0adf528fcf14647cf3fcd85fb7e4fddd2167b36f9e8b2424b62453df28

SHA512
513d09b80e1ac80813bc691e71cdf5348478157350e43b9daed27741b7f5a7a16b2ae4d88ee9951395747c7f2a93ff0c1f2c3753a9e3bad2e2607767a1e3d28e

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Analysis

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