systembc | c1f5b88413bef3bc89aacd544847d5690fe17247b10d5922e59e4cbc6c37707e

General

Target

socks.exe
Size

420KB
MD5

e85fa08c1ed20440363e2e44eced6299
SHA1

e0867a371a5c6bfdf6bd84470b188f0817b4d23a
SHA256

c1f5b88413bef3bc89aacd544847d5690fe17247b10d5922e59e4cbc6c37707e
SHA512

73bc5a867c7b86f32257f43167c1816b9087a0fc6d70f1500194821abbdfcaddb4f79325e0b24837fabb9594284ff9bb7b180de5fc0264287a6345b146ffcfbf
SSDEEP

6144:g/v3nlCZp4WBAo8+zcJHZNIp4id9q/7ygt2k/BFi+Vrh+Z6QFn5EzMJ1:E/lppJHwp5e/viEg6z81

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

31.222.238.58:4280

192.168.1.28:4280

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Drops startup file 1 IoCs

Processes:

socks.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pu5xtvhm.lnk socks.exe
Executes dropped EXE 1 IoCs

Processes:

pu5xtvhm.exe

pid process

1976 pu5xtvhm.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1608 cmd.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

pu5xtvhm.exe

description pid process target process

PID 1976 set thread context of 1944 1976 pu5xtvhm.exe AddInProcess32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery
T1018

Processes:

PING.EXEPING.EXE

pid process

1400 PING.EXE
788 PING.EXE

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pu5xtvhm.lnk	socks.exe

pid	process
1976	pu5xtvhm.exe

pid	process
1608	cmd.exe

description	pid	process	target process
PID 1976 set thread context of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe

pid	process
1400	PING.EXE
788	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

socks.exe

pid	process
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe
1704	socks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

socks.exepu5xtvhm.exe

description pid process

Token: SeDebugPrivilege 1704 socks.exe
Token: SeDebugPrivilege 1976 pu5xtvhm.exe

description	pid	process
Token: SeDebugPrivilege	1704	socks.exe
Token: SeDebugPrivilege	1976	pu5xtvhm.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

socks.execmd.exepu5xtvhm.exe

description	pid	process	target process
PID 1704 wrote to memory of 1608	1704	socks.exe	cmd.exe
PID 1704 wrote to memory of 1608	1704	socks.exe	cmd.exe
PID 1704 wrote to memory of 1608	1704	socks.exe	cmd.exe
PID 1704 wrote to memory of 1608	1704	socks.exe	cmd.exe
PID 1608 wrote to memory of 1400	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 1400	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 1400	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 1400	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 788	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 788	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 788	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 788	1608	cmd.exe	PING.EXE
PID 1608 wrote to memory of 1976	1608	cmd.exe	pu5xtvhm.exe
PID 1608 wrote to memory of 1976	1608	cmd.exe	pu5xtvhm.exe
PID 1608 wrote to memory of 1976	1608	cmd.exe	pu5xtvhm.exe
PID 1608 wrote to memory of 1976	1608	cmd.exe	pu5xtvhm.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe
PID 1976 wrote to memory of 1944	1976	pu5xtvhm.exe	AddInProcess32.exe

C:\Users\Admin\AppData\Local\Temp\socks.exe
"C:\Users\Admin\AppData\Local\Temp\socks.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\SysWOW64\cmd.exe
"cmd" /c ping 127.0.0.1 -n 44 > nul && copy "C:\Users\Admin\AppData\Local\Temp\socks.exe" "C:\Users\Admin\AppData\Roaming\ncache\pu5xtvhm.exe" && ping 127.0.0.1 -n 44 > nul && "C:\Users\Admin\AppData\Roaming\ncache\pu5xtvhm.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1608

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 44
3⤵
- Runs ping.exe
PID:1400

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 44
3⤵
- Runs ping.exe
PID:788

C:\Users\Admin\AppData\Roaming\ncache\pu5xtvhm.exe
"C:\Users\Admin\AppData\Roaming\ncache\pu5xtvhm.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
4⤵
PID:1944

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Remote System Discovery

1

T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\ncache\pu5xtvhm.exe
Filesize
420KB

MD5
e85fa08c1ed20440363e2e44eced6299

SHA1
e0867a371a5c6bfdf6bd84470b188f0817b4d23a

SHA256
c1f5b88413bef3bc89aacd544847d5690fe17247b10d5922e59e4cbc6c37707e

SHA512
73bc5a867c7b86f32257f43167c1816b9087a0fc6d70f1500194821abbdfcaddb4f79325e0b24837fabb9594284ff9bb7b180de5fc0264287a6345b146ffcfbf

Download Submit
C:\Users\Admin\AppData\Roaming\ncache\pu5xtvhm.exe
Filesize
420KB

MD5
e85fa08c1ed20440363e2e44eced6299

SHA1
e0867a371a5c6bfdf6bd84470b188f0817b4d23a

SHA256
c1f5b88413bef3bc89aacd544847d5690fe17247b10d5922e59e4cbc6c37707e

SHA512
73bc5a867c7b86f32257f43167c1816b9087a0fc6d70f1500194821abbdfcaddb4f79325e0b24837fabb9594284ff9bb7b180de5fc0264287a6345b146ffcfbf

Download Submit
\Users\Admin\AppData\Roaming\ncache\pu5xtvhm.exe
Filesize
420KB

MD5
e85fa08c1ed20440363e2e44eced6299

SHA1
e0867a371a5c6bfdf6bd84470b188f0817b4d23a

SHA256
c1f5b88413bef3bc89aacd544847d5690fe17247b10d5922e59e4cbc6c37707e

SHA512
73bc5a867c7b86f32257f43167c1816b9087a0fc6d70f1500194821abbdfcaddb4f79325e0b24837fabb9594284ff9bb7b180de5fc0264287a6345b146ffcfbf

Download Submit
memory/1704-54-0x0000000000BC0000-0x0000000000C2E000-memory.dmp

Filesize
440KB

Download
memory/1704-55-0x0000000000A20000-0x0000000000A60000-memory.dmp

Filesize
256KB

Download
memory/1704-56-0x00000000007D0000-0x000000000081A000-memory.dmp

Filesize
296KB

Download
memory/1704-57-0x0000000000320000-0x0000000000338000-memory.dmp

Filesize
96KB

Download
memory/1704-58-0x0000000000A20000-0x0000000000A60000-memory.dmp

Filesize
256KB

Download
memory/1704-60-0x0000000000A20000-0x0000000000A60000-memory.dmp

Filesize
256KB

Download
memory/1704-61-0x0000000000A20000-0x0000000000A60000-memory.dmp

Filesize
256KB

Download
memory/1704-62-0x0000000000A20000-0x0000000000A60000-memory.dmp

Filesize
256KB

Download
memory/1704-63-0x0000000000A20000-0x0000000000A60000-memory.dmp

Filesize
256KB

Download
memory/1944-80-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1944-81-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1944-88-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1944-87-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1944-86-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1944-85-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1944-84-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1944-83-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1944-82-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1976-76-0x0000000000FE0000-0x0000000001020000-memory.dmp

Filesize
256KB

Download
memory/1976-71-0x00000000011E0000-0x000000000124E000-memory.dmp

Filesize
440KB

Download
memory/1976-79-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/1976-78-0x0000000000630000-0x000000000064A000-memory.dmp

Filesize
104KB

Download
memory/1976-77-0x0000000000FE0000-0x0000000001020000-memory.dmp

Filesize
256KB

Download
memory/1976-72-0x0000000000FE0000-0x0000000001020000-memory.dmp

Filesize
256KB

Download
memory/1976-75-0x0000000000FE0000-0x0000000001020000-memory.dmp

Filesize
256KB

Download
memory/1976-74-0x0000000000FE0000-0x0000000001020000-memory.dmp

Filesize
256KB

Download
memory/1976-73-0x0000000000FE0000-0x0000000001020000-memory.dmp

Filesize
256KB

Download

Analysis

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