systembc | a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61

General

Target

a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe
Size

91KB
MD5

a2d3b46eda5ac1fa3e13d132cc8f57f0
SHA1

5f816267f2d1c0d32df65e85f6582673a7070f19
SHA256

a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61
SHA512

7127703dfe4d39e0b3fc59583cc322b517f40530170ef4936452a85618f2db97f65b4063b6c40d554c0719b440e7919e9ee9d56bd93bcf37420c90f10f4d1e8c

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:

sfxefi.exe

pid process

304 sfxefi.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
304	sfxefi.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:

a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe

description	ioc	process
File created	C:\Windows\Tasks\sfxefi.job	a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe
File opened for modification	C:\Windows\Tasks\sfxefi.job	a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe

pid process

1944 a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe

pid	process
1944	a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 756 wrote to memory of 304	756	taskeng.exe	sfxefi.exe
PID 756 wrote to memory of 304	756	taskeng.exe	sfxefi.exe
PID 756 wrote to memory of 304	756	taskeng.exe	sfxefi.exe
PID 756 wrote to memory of 304	756	taskeng.exe	sfxefi.exe

C:\Users\Admin\AppData\Local\Temp\a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe
"C:\Users\Admin\AppData\Local\Temp\a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1944

C:\Windows\system32\taskeng.exe
taskeng.exe {8DB69C48-AB3B-42D5-8C8D-F43074E0F592} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:756

C:\ProgramData\vdrax\sfxefi.exe
C:\ProgramData\vdrax\sfxefi.exe start
2⤵
- Executes dropped EXE
PID:304

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Connection Proxy

1

T1090

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Connection Proxy

1

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\vdrax\sfxefi.exe
Filesize
91KB

MD5
a2d3b46eda5ac1fa3e13d132cc8f57f0

SHA1
5f816267f2d1c0d32df65e85f6582673a7070f19

SHA256
a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61

SHA512
7127703dfe4d39e0b3fc59583cc322b517f40530170ef4936452a85618f2db97f65b4063b6c40d554c0719b440e7919e9ee9d56bd93bcf37420c90f10f4d1e8c

Download Submit
C:\ProgramData\vdrax\sfxefi.exe
Filesize
91KB

MD5
a2d3b46eda5ac1fa3e13d132cc8f57f0

SHA1
5f816267f2d1c0d32df65e85f6582673a7070f19

SHA256
a7c6a1d224cf00ada45c4db86f9080e25965513f85c6ecd7b8d8d9c847b36c61

SHA512
7127703dfe4d39e0b3fc59583cc322b517f40530170ef4936452a85618f2db97f65b4063b6c40d554c0719b440e7919e9ee9d56bd93bcf37420c90f10f4d1e8c

Download Submit
memory/304-60-0x0000000000000000-mapping.dmp

Download
memory/304-62-0x000000000342B000-0x0000000003432000-memory.dmp

Filesize
28KB

Download
memory/304-64-0x000000000342B000-0x0000000003432000-memory.dmp

Filesize
28KB

Download
memory/304-65-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download
memory/1944-54-0x000000000312B000-0x0000000003132000-memory.dmp

Filesize
28KB

Download
memory/1944-55-0x0000000075DE1000-0x0000000075DE3000-memory.dmp

Filesize
8KB

Download
memory/1944-56-0x000000000312B000-0x0000000003132000-memory.dmp

Filesize
28KB

Download
memory/1944-57-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1944-58-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download

Analysis

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