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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

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-1-5-21-1675742406-747946869-1029867430-1000\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 1532 set thread context of 4052	1532	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 4 IoCs

Processes:

powershell.exeb05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

pid	process
264	powershell.exe
264	powershell.exe
1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe
1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeb05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	pid	process
Token: SeDebugPrivilege	264	powershell.exe
Token: SeDebugPrivilege	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe

description	pid	process	target process
PID 1532 wrote to memory of 264	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 1532 wrote to memory of 264	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 1532 wrote to memory of 264	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	powershell.exe
PID 1532 wrote to memory of 4352	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4352	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4352	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe
PID 1532 wrote to memory of 4052	1532	b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe
"C:\Users\Admin\AppData\Local\Temp\b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1532

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:264

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
PID:4352

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
PID:4052

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bgs31mhk.stx.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/264-138-0x0000000000C50000-0x0000000000C86000-memory.dmp

Filesize
216KB

Download
memory/264-158-0x0000000000C40000-0x0000000000C50000-memory.dmp

Filesize
64KB

Download
memory/264-153-0x0000000005A00000-0x0000000005A1E000-memory.dmp

Filesize
120KB

Download
memory/264-148-0x0000000004D40000-0x0000000004DA6000-memory.dmp

Filesize
408KB

Download
memory/264-160-0x0000000000C40000-0x0000000000C50000-memory.dmp

Filesize
64KB

Download
memory/264-139-0x0000000004E40000-0x0000000005468000-memory.dmp

Filesize
6.2MB

Download
memory/264-140-0x0000000000C40000-0x0000000000C50000-memory.dmp

Filesize
64KB

Download
memory/264-141-0x0000000000C40000-0x0000000000C50000-memory.dmp

Filesize
64KB

Download
memory/264-154-0x0000000000C40000-0x0000000000C50000-memory.dmp

Filesize
64KB

Download
memory/264-159-0x0000000000C40000-0x0000000000C50000-memory.dmp

Filesize
64KB

Download
memory/264-156-0x0000000005EF0000-0x0000000005F0A000-memory.dmp

Filesize
104KB

Download
memory/264-155-0x0000000007060000-0x00000000076DA000-memory.dmp

Filesize
6.5MB

Download
memory/264-144-0x0000000004CD0000-0x0000000004D36000-memory.dmp

Filesize
408KB

Download
memory/1532-136-0x00000000054D0000-0x0000000005562000-memory.dmp

Filesize
584KB

Download
memory/1532-157-0x00000000052D0000-0x00000000052E0000-memory.dmp

Filesize
64KB

Download
memory/1532-135-0x00000000052D0000-0x00000000052E0000-memory.dmp

Filesize
64KB

Download
memory/1532-134-0x00000000059D0000-0x0000000005F74000-memory.dmp

Filesize
5.6MB

Download
memory/1532-133-0x00000000008F0000-0x00000000009E2000-memory.dmp

Filesize
968KB

Download
memory/1532-137-0x00000000058D0000-0x00000000058F2000-memory.dmp

Filesize
136KB

Download
memory/4052-169-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4052-165-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4052-168-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads