Analysis
- max time kernel
140s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20231201-en - resource tags
- submitted
09/12/2023, 11:28
General
- Target lilshunrat.exe
- Size 74KB
- Sample231209-nk371agbbl
- SHA256 d9829351c7d12a885ca361b4e9672d35ba39e0b0200b6ea8ca0b992e53b27a34
Malware Config
Extracted
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asyncrat
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Venom RAT + HVNC + Stealer + Grabber v6.0.3
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Default
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10.8.3.190:5058
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lhrrvxawbbpugii
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delay
1
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install
true
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install_file
lilshunrat.exe
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install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 4 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 30 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\lilshunrat.exe"C:\Users\Admin\AppData\Local\Temp\lilshunrat.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "lilshunrat" /tr '"C:\Users\Admin\AppData\Roaming\lilshunrat.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "lilshunrat" /tr '"C:\Users\Admin\AppData\Roaming\lilshunrat.exe"'3⤵
- Creates scheduled task(s)
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp472B.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Roaming\lilshunrat.exe"C:\Users\Admin\AppData\Roaming\lilshunrat.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
lilshunrat.exe.log
tmp472B.tmp.bat
DataLogs.conf
lilshunrat.exe
lilshunrat.exe
memory/1200-17-0x00007FF87BE10000-0x00007FF87C8D1000-memory.dmp
memory/1200-18-0x000000001B8A0000-0x000000001B8B0000-memory.dmp
memory/1200-19-0x00007FF87BE10000-0x00007FF87C8D1000-memory.dmp
memory/1200-20-0x000000001B8A0000-0x000000001B8B0000-memory.dmp
memory/1476-0-0x00000000008B0000-0x00000000008C8000-memory.dmp
memory/1476-10-0x00007FF89A5B0000-0x00007FF89A7A5000-memory.dmp
memory/1476-9-0x00007FF87C400000-0x00007FF87CEC1000-memory.dmp
memory/1476-2-0x00007FF87C400000-0x00007FF87CEC1000-memory.dmp
memory/1476-6-0x00007FF89A5B0000-0x00007FF89A7A5000-memory.dmp
memory/1476-3-0x000000001B630000-0x000000001B640000-memory.dmp