systembc | efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b

General

Target

efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe
Size

218KB
MD5

f8a0cd4e6952e95016502054cc56454f
SHA1

7470a9b6949954168867e4f7dcc3b36cd8dbc0f2
SHA256

efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b
SHA512

9be869b1f257b41950ab6ef6674357714a38b11358354507f0b8b6e50999ffd69154a0734dc51314488bf1eb23263552964d4dcd734e79a62097037d68e13064

Score

10^/10

systembc suricata trojan

Malware Config

Extracted

Family

systembc

C2

sdadvert197.com:4044

mexstat128.com: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:

djlviu.exe

pid process

1352 djlviu.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
1352	djlviu.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:

efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe

description	ioc	process
File created	C:\Windows\Tasks\djlviu.job	efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe
File opened for modification	C:\Windows\Tasks\djlviu.job	efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe

pid process

1796 efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe

pid	process
1796	efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1956 wrote to memory of 1352	1956	taskeng.exe	djlviu.exe
PID 1956 wrote to memory of 1352	1956	taskeng.exe	djlviu.exe
PID 1956 wrote to memory of 1352	1956	taskeng.exe	djlviu.exe
PID 1956 wrote to memory of 1352	1956	taskeng.exe	djlviu.exe

C:\Users\Admin\AppData\Local\Temp\efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe
"C:\Users\Admin\AppData\Local\Temp\efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1796

C:\Windows\system32\taskeng.exe
taskeng.exe {78D838C6-CEFE-451B-AA36-E0D66E350F17} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1956

C:\ProgramData\bbxrevp\djlviu.exe
C:\ProgramData\bbxrevp\djlviu.exe start
2⤵
- Executes dropped EXE
PID:1352

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\bbxrevp\djlviu.exe
Filesize
218KB

MD5
f8a0cd4e6952e95016502054cc56454f

SHA1
7470a9b6949954168867e4f7dcc3b36cd8dbc0f2

SHA256
efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b

SHA512
9be869b1f257b41950ab6ef6674357714a38b11358354507f0b8b6e50999ffd69154a0734dc51314488bf1eb23263552964d4dcd734e79a62097037d68e13064

Download Submit
C:\ProgramData\bbxrevp\djlviu.exe
Filesize
218KB

MD5
f8a0cd4e6952e95016502054cc56454f

SHA1
7470a9b6949954168867e4f7dcc3b36cd8dbc0f2

SHA256
efdd541a2725791d17cda91b62e811d61bd367886fa6bb383934014e18f0a43b

SHA512
9be869b1f257b41950ab6ef6674357714a38b11358354507f0b8b6e50999ffd69154a0734dc51314488bf1eb23263552964d4dcd734e79a62097037d68e13064

Download Submit
memory/1352-59-0x0000000000000000-mapping.dmp

Download
memory/1352-62-0x000000000088B000-0x0000000000892000-memory.dmp

Filesize
28KB

Download
memory/1352-63-0x0000000000400000-0x0000000000708000-memory.dmp

Filesize
3.0MB

Download
memory/1796-54-0x0000000075951000-0x0000000075953000-memory.dmp

Filesize
8KB

Download
memory/1796-55-0x000000000087C000-0x0000000000882000-memory.dmp

Filesize
24KB

Download
memory/1796-56-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1796-57-0x0000000000400000-0x0000000000708000-memory.dmp

Filesize
3.0MB

Download

Analysis

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