systembc | c08ae3fc4f7db6848f829eb7548530e2522ee3eb60a57b2c38cd1bdc862f5d6f

Analysis

max time kernel
299s
max time network
300s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
18/04/2024, 05:27

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General

Target
88b7218e0e2ce38dcbb6647aebc1b915.exe
Size 168KB
Sample240418-f5plcacd64
SHA256 c08ae3fc4f7db6848f829eb7548530e2522ee3eb60a57b2c38cd1bdc862f5d6f
MD5 88b7218e0e2ce38dcbb6647aebc1b915
SHA1 84359a09ba1025ef5e17521a098aa1a5b27300df
SHA512 1976d16421d6085d9588c62712ea31b7bc31abb1f7bf8cae238b700fd5932d0f0aa46675e824201e5a292811c5bd6fe0e91d7b62d39b85e566a45d814255dd66
SSDEEP 3072:GlN7OGtM7vN+Ma/lkphLMzirj6gvzH2Hd81VrX2fMZ:k7OhfCGh4zw1vDE2nB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

knock0909.monster:4035
knock0909.xyz:4035

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
1216	olga.exe

Looks up external IP address via web service 4 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	ip4.seeip.org
8	ip4.seeip.org
5	api.ipify.org
6	api.ipify.org

Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Proxy
T1090

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Tasks\olga.job	88b7218e0e2ce38dcbb6647aebc1b915.exe
File created	C:\Windows\Tasks\olga.job	88b7218e0e2ce38dcbb6647aebc1b915.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1720	88b7218e0e2ce38dcbb6647aebc1b915.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 1216	2192	taskeng.exe	29
PID 2192 wrote to memory of 1216	2192	taskeng.exe	29
PID 2192 wrote to memory of 1216	2192	taskeng.exe	29
PID 2192 wrote to memory of 1216	2192	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\88b7218e0e2ce38dcbb6647aebc1b915.exe
"C:\Users\Admin\AppData\Local\Temp\88b7218e0e2ce38dcbb6647aebc1b915.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1720

C:\Windows\system32\taskeng.exe
taskeng.exe {11F3CF9F-9AEF-4CC5-AD28-C9CFDBBB60FA} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2192
- C:\ProgramData\muwpxas\olga.exe
  C:\ProgramData\muwpxas\olga.exe start
  2⤵
  - Executes dropped EXE
  PID:1216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

olga.exe

Path C:\ProgramData\muwpxas\olga.exe
Size 168KB
SHA256 c08ae3fc4f7db6848f829eb7548530e2522ee3eb60a57b2c38cd1bdc862f5d6f
MD5 88b7218e0e2ce38dcbb6647aebc1b915
SHA1 84359a09ba1025ef5e17521a098aa1a5b27300df
SHA512 1976d16421d6085d9588c62712ea31b7bc31abb1f7bf8cae238b700fd5932d0f0aa46675e824201e5a292811c5bd6fe0e91d7b62d39b85e566a45d814255dd66
SSDEEP 3072:GlN7OGtM7vN+Ma/lkphLMzirj6gvzH2Hd81VrX2fMZ:k7OhfCGh4zw1vDE2nB
MD5 SHA1 SHA512 SSDEEP

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memory/1216-10-0x00000000060D0000-0x00000000061D0000-memory.dmp

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memory/1216-12-0x0000000000400000-0x0000000005FCC000-memory.dmp

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memory/1216-16-0x00000000060D0000-0x00000000061D0000-memory.dmp

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memory/1720-1-0x0000000006180000-0x0000000006280000-memory.dmp

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memory/1720-2-0x0000000000220000-0x0000000000229000-memory.dmp

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memory/1720-3-0x0000000000400000-0x0000000005FCC000-memory.dmp

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memory/1720-13-0x0000000006180000-0x0000000006280000-memory.dmp

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