Analysis
- max time kernel
148s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20230221-en - resource tags
- submitted
06/03/2023, 21:41
General
- Target b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66.exe
- Size 944KB
- Sample230306-1jsq4aed6z
- SHA256 b05920b00f2252b5060c6a6b0dbe4df78973754a8044598c65fc7ad60b498e66
Malware Config
Extracted
-
systembc
-
31.222.238.58:4280
-
192.168.1.28:4280
Signatures
- SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
-
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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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
-
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe2⤵
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
__PSScriptPolicyTest_m5q3hk3m.4tu.ps1
memory/1028-168-0x0000000000400000-0x0000000000406000-memory.dmp
memory/1028-167-0x0000000000400000-0x0000000000406000-memory.dmp
memory/1028-164-0x0000000000400000-0x0000000000406000-memory.dmp
memory/1660-138-0x00000000051D0000-0x0000000005206000-memory.dmp
memory/1660-154-0x0000000007DE0000-0x000000000845A000-memory.dmp
memory/1660-141-0x00000000058E0000-0x0000000005F08000-memory.dmp
memory/1660-140-0x00000000052A0000-0x00000000052B0000-memory.dmp
memory/1660-139-0x00000000052A0000-0x00000000052B0000-memory.dmp
memory/1660-142-0x0000000005F10000-0x0000000005F76000-memory.dmp
memory/1660-159-0x00000000052A0000-0x00000000052B0000-memory.dmp
memory/1660-148-0x0000000006130000-0x0000000006196000-memory.dmp
memory/1660-153-0x00000000067A0000-0x00000000067BE000-memory.dmp
memory/1660-158-0x00000000052A0000-0x00000000052B0000-memory.dmp
memory/1660-155-0x00000000052A0000-0x00000000052B0000-memory.dmp
memory/1660-156-0x0000000006CB0000-0x0000000006CCA000-memory.dmp
memory/1660-157-0x00000000052A0000-0x00000000052B0000-memory.dmp
memory/2572-133-0x0000000000280000-0x0000000000372000-memory.dmp
memory/2572-137-0x0000000005260000-0x0000000005282000-memory.dmp
memory/2572-136-0x0000000004ED0000-0x0000000004F62000-memory.dmp
memory/2572-135-0x00000000053E0000-0x0000000005984000-memory.dmp
memory/2572-134-0x0000000004D80000-0x0000000004D90000-memory.dmp