systembc | b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e

General

Target

b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe
Size

285KB
MD5

44104370647086089833d115c55f6d7f
SHA1

502c3678a36c7433bc402f787cc0f0c7cc7eec29
SHA256

b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e
SHA512

a91ca5aa9dfa02f35ef2344b3485e28ab55f41fc4d0f38a9d176b959e10cbfdba8a79b304d67ec3e1478ed9270e3e79855bd352a932e3845e8141ac471b2b29e

Score

10^/10

systembc 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
Executes dropped EXE 1 IoCs

Processes:

qjdx.exe

pid process

772 qjdx.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

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

Connection Proxy
T1090

pid	process
772	qjdx.exe

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

Drops file in Windows directory 2 IoCs

Processes:

b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe

description	ioc	process
File created	C:\Windows\Tasks\qjdx.job	b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe
File opened for modification	C:\Windows\Tasks\qjdx.job	b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe

pid process

1088 b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe

pid	process
1088	b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 552 wrote to memory of 772	552	taskeng.exe	qjdx.exe
PID 552 wrote to memory of 772	552	taskeng.exe	qjdx.exe
PID 552 wrote to memory of 772	552	taskeng.exe	qjdx.exe
PID 552 wrote to memory of 772	552	taskeng.exe	qjdx.exe

C:\Users\Admin\AppData\Local\Temp\b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe
"C:\Users\Admin\AppData\Local\Temp\b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1088

C:\Windows\system32\taskeng.exe
taskeng.exe {8BE72859-8E3C-44EF-9012-2EB6BA2EC885} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:552
- C:\ProgramData\rghref\qjdx.exe
  C:\ProgramData\rghref\qjdx.exe start
  2⤵
  - Executes dropped EXE
  PID:772

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\rghref\qjdx.exe

MD5
44104370647086089833d115c55f6d7f

SHA1
502c3678a36c7433bc402f787cc0f0c7cc7eec29

SHA256
b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e

SHA512
a91ca5aa9dfa02f35ef2344b3485e28ab55f41fc4d0f38a9d176b959e10cbfdba8a79b304d67ec3e1478ed9270e3e79855bd352a932e3845e8141ac471b2b29e

Download Submit
C:\ProgramData\rghref\qjdx.exe

MD5
44104370647086089833d115c55f6d7f

SHA1
502c3678a36c7433bc402f787cc0f0c7cc7eec29

SHA256
b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e

SHA512
a91ca5aa9dfa02f35ef2344b3485e28ab55f41fc4d0f38a9d176b959e10cbfdba8a79b304d67ec3e1478ed9270e3e79855bd352a932e3845e8141ac471b2b29e

Download Submit
memory/772-59-0x0000000000000000-mapping.dmp

Download
memory/772-62-0x0000000000400000-0x00000000046C7000-memory.dmp

Filesize
66.8MB

Download
memory/1088-54-0x0000000075C41000-0x0000000075C43000-memory.dmp

Filesize
8KB

Download
memory/1088-56-0x0000000000240000-0x0000000000249000-memory.dmp

Filesize
36KB

Download
memory/1088-55-0x00000000001B0000-0x00000000001B6000-memory.dmp

Filesize
24KB

Download
memory/1088-57-0x0000000000400000-0x00000000046C7000-memory.dmp

Filesize
66.8MB

Download

Analysis

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