systembc | e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf

General

Target

e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe
Size

89KB
MD5

223f824fbc8cacd41d0e119034c1d043
SHA1

3b8e9eff67bc8f37431b26dbcde55e0c1767519d
SHA256

e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf
SHA512

849c3d8345b4fcb22afc6786052e06cfa9cb5ac853a318e91be934dbeda7a15ebc068d2d6e2f8b2ad0d7fd88e30660f71703557512175808656c64e337d688e1

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:

qnjj.exe

pid process

1156 qnjj.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
1156	qnjj.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:

e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe

description	ioc	process
File created	C:\Windows\Tasks\qnjj.job	e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe
File opened for modification	C:\Windows\Tasks\qnjj.job	e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe

pid process

1100 e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe

pid	process
1100	e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1664 wrote to memory of 1156	1664	taskeng.exe	qnjj.exe
PID 1664 wrote to memory of 1156	1664	taskeng.exe	qnjj.exe
PID 1664 wrote to memory of 1156	1664	taskeng.exe	qnjj.exe
PID 1664 wrote to memory of 1156	1664	taskeng.exe	qnjj.exe

C:\Users\Admin\AppData\Local\Temp\e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe
"C:\Users\Admin\AppData\Local\Temp\e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1100

C:\Windows\system32\taskeng.exe
taskeng.exe {3E25DAF9-6DB0-4704-AAA5-D37DDB5CB97D} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1664

C:\ProgramData\qfjkj\qnjj.exe
C:\ProgramData\qfjkj\qnjj.exe start
2⤵
- Executes dropped EXE
PID:1156

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

Loading Replay Monitor...

Downloads

C:\ProgramData\qfjkj\qnjj.exe
Filesize
89KB

MD5
223f824fbc8cacd41d0e119034c1d043

SHA1
3b8e9eff67bc8f37431b26dbcde55e0c1767519d

SHA256
e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf

SHA512
849c3d8345b4fcb22afc6786052e06cfa9cb5ac853a318e91be934dbeda7a15ebc068d2d6e2f8b2ad0d7fd88e30660f71703557512175808656c64e337d688e1

Download Submit
C:\ProgramData\qfjkj\qnjj.exe
Filesize
89KB

MD5
223f824fbc8cacd41d0e119034c1d043

SHA1
3b8e9eff67bc8f37431b26dbcde55e0c1767519d

SHA256
e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf

SHA512
849c3d8345b4fcb22afc6786052e06cfa9cb5ac853a318e91be934dbeda7a15ebc068d2d6e2f8b2ad0d7fd88e30660f71703557512175808656c64e337d688e1

Download Submit
memory/1100-54-0x0000000075E31000-0x0000000075E33000-memory.dmp

Filesize
8KB

Download
memory/1100-56-0x00000000001B0000-0x00000000001B9000-memory.dmp

Filesize
36KB

Download
memory/1100-55-0x000000000026B000-0x0000000000272000-memory.dmp

Filesize
28KB

Download
memory/1100-57-0x0000000000400000-0x0000000002FA2000-memory.dmp

Filesize
43.6MB

Download
memory/1156-59-0x0000000000000000-mapping.dmp

Download
memory/1156-62-0x00000000030AB000-0x00000000030B2000-memory.dmp

Filesize
28KB

Download
memory/1156-63-0x0000000000400000-0x0000000002FA2000-memory.dmp

Filesize
43.6MB

Download

Analysis

Sharing