Analysis
- max time kernel
147s - max time network
95s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
09/04/2024, 22:34
General
- Target 4f9f63fc9e0ac76188596bb2efd3b033.exe
- Size 63KB
- Sample240409-2hblvsfb37
- SHA256 b7491f105a9624be5fec6a46e6932074730758bba75a6a7f74ea3e9b4d92eccb
Malware Config
Extracted
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asyncrat
-
5.0.5
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Venom Clients
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127.0.0.1:4449
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Venom_RAT_HVNC_Mutex_Venom RAT_HVNC
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delay
1
-
install
true
-
install_file
SVCHOSTER.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 1 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 23 IoCs
- Suspicious use of AdjustPrivilegeToken 2 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\4f9f63fc9e0ac76188596bb2efd3b033.exe"C:\Users\Admin\AppData\Local\Temp\4f9f63fc9e0ac76188596bb2efd3b033.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 "SVCHOSTER" /tr '"C:\Users\Admin\AppData\Roaming\SVCHOSTER.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "SVCHOSTER" /tr '"C:\Users\Admin\AppData\Roaming\SVCHOSTER.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\tmp538E.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\SVCHOSTER.exe"C:\Users\Admin\AppData\Roaming\SVCHOSTER.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
tmp538E.tmp.bat
SVCHOSTER.exe
memory/2712-0-0x0000000000C90000-0x0000000000CA6000-memory.dmp
memory/2712-1-0x00007FFB677A0000-0x00007FFB68261000-memory.dmp
memory/2712-2-0x000000001B930000-0x000000001B940000-memory.dmp
memory/2712-7-0x00007FFB7AE90000-0x00007FFB7B085000-memory.dmp
memory/2712-8-0x00007FFB677A0000-0x00007FFB68261000-memory.dmp
memory/5044-13-0x00007FFB5CE00000-0x00007FFB5D8C1000-memory.dmp
memory/5044-14-0x000000001AE00000-0x000000001AE10000-memory.dmp
memory/5044-15-0x00007FFB7AE90000-0x00007FFB7B085000-memory.dmp
memory/5044-16-0x00007FFB5CE00000-0x00007FFB5D8C1000-memory.dmp
memory/5044-17-0x000000001AE00000-0x000000001AE10000-memory.dmp