systembc | b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66

General

Target

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe
Size

944KB
MD5

c962299aa7f1294524a03cb2c7925f14
SHA1

2c3a73a02cf691248c5ecaa1d2111f9b0c197713
SHA256

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66
SHA512

9dd66ddce441cb20ca296ddc9ba9023c397ef27ca6974fec8f6bd5e0b12167154f91606a1216bc745d7aa8babcf1677c005120b8c56bb4ab8583a3a796f19d7b
SSDEEP

24576:K5VTOzE3lI8hzkn1L2eEFk/6cXJ/dEI56q2A/Te:IcE1rzk1ahFYXJl75h1/T

Score

10^/10

systembc persistence 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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1311743041-1167936498-546579926-1000\Software\Microsoft\Windows\CurrentVersion\Run\SoundTune = "\"C:\\Users\\Admin\\AppData\\Roaming\\Thocsxcxzh\\SoundTune.exe\""	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	pid	process	target process
PID 4024 set thread context of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exe

pid process

4416 powershell.exe
4416 powershell.exe
4416 powershell.exe

pid	process
4416	powershell.exe
4416	powershell.exe
4416	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeb05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	pid	process
Token: SeDebugPrivilege	4416	powershell.exe
Token: SeDebugPrivilege	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	pid	process	target process
PID 4024 wrote to memory of 4416	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 4024 wrote to memory of 4416	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 4024 wrote to memory of 4416	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 4024 wrote to memory of 3688	4024	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe
"C:\Users\Admin\AppData\Local\Temp\b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4024
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4416
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:3688

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4nnpv423.orb.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/3688-169-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3688-168-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3688-165-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4024-127-0x0000000004C70000-0x0000000004C76000-memory.dmp

Filesize
24KB

Download
memory/4024-126-0x0000000004EB0000-0x0000000004F50000-memory.dmp

Filesize
640KB

Download
memory/4024-121-0x0000000000210000-0x0000000000302000-memory.dmp

Filesize
968KB

Download
memory/4024-128-0x0000000005080000-0x00000000050A2000-memory.dmp

Filesize
136KB

Download
memory/4024-129-0x0000000005770000-0x0000000005AC0000-memory.dmp

Filesize
3.3MB

Download
memory/4024-122-0x0000000004D60000-0x0000000004D70000-memory.dmp

Filesize
64KB

Download
memory/4024-123-0x0000000004AA0000-0x0000000004B78000-memory.dmp

Filesize
864KB

Download
memory/4024-124-0x0000000005270000-0x000000000576E000-memory.dmp

Filesize
5.0MB

Download
memory/4024-157-0x0000000004D60000-0x0000000004D70000-memory.dmp

Filesize
64KB

Download
memory/4024-125-0x0000000004CA0000-0x0000000004D32000-memory.dmp

Filesize
584KB

Download
memory/4416-138-0x0000000007C40000-0x0000000007C5C000-memory.dmp

Filesize
112KB

Download
memory/4416-137-0x0000000007CE0000-0x0000000007D46000-memory.dmp

Filesize
408KB

Download
memory/4416-139-0x0000000008660000-0x00000000086AB000-memory.dmp

Filesize
300KB

Download
memory/4416-140-0x0000000008470000-0x00000000084E6000-memory.dmp

Filesize
472KB

Download
memory/4416-136-0x0000000007C70000-0x0000000007CD6000-memory.dmp

Filesize
408KB

Download
memory/4416-155-0x0000000009B50000-0x000000000A1C8000-memory.dmp

Filesize
6.5MB

Download
memory/4416-156-0x0000000009270000-0x000000000928A000-memory.dmp

Filesize
104KB

Download
memory/4416-135-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/4416-158-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/4416-159-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/4416-134-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/4416-133-0x00000000073F0000-0x0000000007A18000-memory.dmp

Filesize
6.2MB

Download
memory/4416-132-0x0000000004C90000-0x0000000004CC6000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads