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-1-5-21-3430344531-3702557399-3004411149-1000\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 852 set thread context of 1616	852	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 1 IoCs

Processes:

powershell.exe

pid process

1236 powershell.exe

pid	process
1236	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeb05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	pid	process
Token: SeDebugPrivilege	1236	powershell.exe
Token: SeDebugPrivilege	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	pid	process	target process
PID 852 wrote to memory of 1236	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 852 wrote to memory of 1236	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 852 wrote to memory of 1236	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 852 wrote to memory of 1236	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 852 wrote to memory of 1616	852	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:852
- 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:1236
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:1616

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

memory/852-54-0x0000000000E10000-0x0000000000F02000-memory.dmp

Filesize
968KB

Download
memory/852-55-0x0000000004D10000-0x0000000004DE8000-memory.dmp

Filesize
864KB

Download
memory/852-56-0x0000000000D40000-0x0000000000DE0000-memory.dmp

Filesize
640KB

Download
memory/852-57-0x0000000004940000-0x0000000004980000-memory.dmp

Filesize
256KB

Download
memory/852-58-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/852-63-0x0000000004940000-0x0000000004980000-memory.dmp

Filesize
256KB

Download
memory/1236-61-0x00000000025E0000-0x0000000002620000-memory.dmp

Filesize
256KB

Download
memory/1236-62-0x00000000025E0000-0x0000000002620000-memory.dmp

Filesize
256KB

Download
memory/1616-66-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1616-67-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1616-68-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1616-69-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1616-71-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1616-70-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1616-72-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1616-74-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1616-75-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads