systembc | 8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2

General

Target

8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe
Size

87KB
MD5

edeea6a91e82cf4da5cb8209580b4e74
SHA1

182c6cf748e0a1b5f4a12b9a761b3b6982017e6d
SHA256

8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2
SHA512

7530eb2471bb1c65612e7f16793942d7ca02e8b994f390341090eef129634ff604018fb0fe1abe5443d68a7f739719ba332a934e4a0fa7d0bcd8ef1094723226

Score

10^/10

systembc suricata trojan

Malware Config

Extracted

Family

systembc

C2

advertrex20.xyz:4044

gentexman37.xyz:4044

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata
Executes dropped EXE 1 IoCs

Processes:

wfucon.exe

pid process

1656 wfucon.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.

Processes:

flow ioc

5 api.ipify.org
6 api.ipify.org
7 ip4.seeip.org
8 ip4.seeip.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Connection Proxy
T1090

pid	process
1656	wfucon.exe

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

Drops file in Windows directory 2 IoCs

Processes:

8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe

description	ioc	process
File created	C:\Windows\Tasks\wfucon.job	8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe
File opened for modification	C:\Windows\Tasks\wfucon.job	8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe

pid process

1372 8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe

pid	process
1372	8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 240 wrote to memory of 1656	240	taskeng.exe	wfucon.exe
PID 240 wrote to memory of 1656	240	taskeng.exe	wfucon.exe
PID 240 wrote to memory of 1656	240	taskeng.exe	wfucon.exe
PID 240 wrote to memory of 1656	240	taskeng.exe	wfucon.exe

C:\Users\Admin\AppData\Local\Temp\8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe
"C:\Users\Admin\AppData\Local\Temp\8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1372

C:\Windows\system32\taskeng.exe
taskeng.exe {AE8AF0CC-B47D-4FF4-BD6D-141E6703D1A5} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:240

C:\ProgramData\ksih\wfucon.exe
C:\ProgramData\ksih\wfucon.exe start
2⤵
- Executes dropped EXE
PID:1656

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Connection Proxy

1

T1090

Impact

Replay Monitor

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Downloads

C:\ProgramData\ksih\wfucon.exe
Filesize
87KB

MD5
edeea6a91e82cf4da5cb8209580b4e74

SHA1
182c6cf748e0a1b5f4a12b9a761b3b6982017e6d

SHA256
8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2

SHA512
7530eb2471bb1c65612e7f16793942d7ca02e8b994f390341090eef129634ff604018fb0fe1abe5443d68a7f739719ba332a934e4a0fa7d0bcd8ef1094723226

Download Submit
C:\ProgramData\ksih\wfucon.exe
Filesize
87KB

MD5
edeea6a91e82cf4da5cb8209580b4e74

SHA1
182c6cf748e0a1b5f4a12b9a761b3b6982017e6d

SHA256
8401fa8aa07c8cd1d4f46e41f70fd2db414f288db8c324ea61ea5dcd5c99b3c2

SHA512
7530eb2471bb1c65612e7f16793942d7ca02e8b994f390341090eef129634ff604018fb0fe1abe5443d68a7f739719ba332a934e4a0fa7d0bcd8ef1094723226

Download Submit
memory/1372-54-0x0000000075B71000-0x0000000075B73000-memory.dmp

Filesize
8KB

Download
memory/1372-55-0x00000000030FB000-0x0000000003102000-memory.dmp

Filesize
28KB

Download
memory/1372-56-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1372-57-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download
memory/1656-59-0x0000000000000000-mapping.dmp

Download
memory/1656-62-0x00000000002CB000-0x00000000002D2000-memory.dmp

Filesize
28KB

Download
memory/1656-63-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download

Analysis

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