systembc | 6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c

General

Target

6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe
Size

89KB
MD5

754f68fbcd88c48a9c689632b66967c4
SHA1

fc20fe331d1699145df56ec11a95cb6d7f72279f
SHA256

6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c
SHA512

0b7e83826ec8a7599fd876590e8c096f71a034d56e34d138c4d29ac3bf8c512aecacebdd64a47ce5bf449a27802cf915a5a6a8ae251eb66a7262df1065a0f839

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:

busfmr.exe

pid process

1164 busfmr.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

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

Connection Proxy
T1090

pid	process
1164	busfmr.exe

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

Drops file in Windows directory 2 IoCs

Processes:

6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe

description	ioc	process
File created	C:\Windows\Tasks\busfmr.job	6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe
File opened for modification	C:\Windows\Tasks\busfmr.job	6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe

pid process

688 6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe

pid	process
688	6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1816 wrote to memory of 1164	1816	taskeng.exe	busfmr.exe
PID 1816 wrote to memory of 1164	1816	taskeng.exe	busfmr.exe
PID 1816 wrote to memory of 1164	1816	taskeng.exe	busfmr.exe
PID 1816 wrote to memory of 1164	1816	taskeng.exe	busfmr.exe

C:\Users\Admin\AppData\Local\Temp\6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe
"C:\Users\Admin\AppData\Local\Temp\6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:688

C:\Windows\system32\taskeng.exe
taskeng.exe {F007ED0F-F347-4C9B-A40B-ADE139D0B17B} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1816

C:\ProgramData\jrvs\busfmr.exe
C:\ProgramData\jrvs\busfmr.exe start
2⤵
- Executes dropped EXE
PID:1164

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\jrvs\busfmr.exe
Filesize
89KB

MD5
754f68fbcd88c48a9c689632b66967c4

SHA1
fc20fe331d1699145df56ec11a95cb6d7f72279f

SHA256
6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c

SHA512
0b7e83826ec8a7599fd876590e8c096f71a034d56e34d138c4d29ac3bf8c512aecacebdd64a47ce5bf449a27802cf915a5a6a8ae251eb66a7262df1065a0f839

Download Submit
C:\ProgramData\jrvs\busfmr.exe
Filesize
89KB

MD5
754f68fbcd88c48a9c689632b66967c4

SHA1
fc20fe331d1699145df56ec11a95cb6d7f72279f

SHA256
6bc401f2d24746bb192fb23fcaf705b94b7f6742b9d651266345bbab434e351c

SHA512
0b7e83826ec8a7599fd876590e8c096f71a034d56e34d138c4d29ac3bf8c512aecacebdd64a47ce5bf449a27802cf915a5a6a8ae251eb66a7262df1065a0f839

Download Submit
memory/688-54-0x0000000075AE1000-0x0000000075AE3000-memory.dmp

Filesize
8KB

Download
memory/688-55-0x000000000319B000-0x00000000031A2000-memory.dmp

Filesize
28KB

Download
memory/688-56-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/688-57-0x0000000000400000-0x0000000002FA2000-memory.dmp

Filesize
43.6MB

Download
memory/1164-59-0x0000000000000000-mapping.dmp

Download
memory/1164-62-0x00000000030CB000-0x00000000030D2000-memory.dmp

Filesize
28KB

Download
memory/1164-63-0x0000000000400000-0x0000000002FA2000-memory.dmp

Filesize
43.6MB

Download

Analysis

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