Analysis
- max time kernel
161s - max time network
173s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
16/03/2024, 21:31
General
- Target cf1fa88ec651403f3277206938923984.exe
- Size 35KB
- Sample240316-1c7xfaee72
- SHA256 108af6e6960363234e7fb0ca3804376dfc8faaa3a27bb709ac3d630d8105bad4
Malware Config
Extracted
-
asyncrat
-
0.5.7B
-
Default
-
127.0.0.1:6606
-
127.0.0.1:7707
-
127.0.0.1:8808
-
AsyncMutex_6SI8OkPnk
-
delay
3
-
install
false
-
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).
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\cf1fa88ec651403f3277206938923984.exe"C:\Users\Admin\AppData\Local\Temp\cf1fa88ec651403f3277206938923984.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\asrat.exe"C:\Users\Admin\AppData\Local\Temp\asrat.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asrat.exe
memory/1792-17-0x0000000000610000-0x0000000000622000-memory.dmp
memory/1792-18-0x00000000749C0000-0x0000000075170000-memory.dmp
memory/1792-19-0x0000000005120000-0x0000000005130000-memory.dmp
memory/1792-20-0x00000000749C0000-0x0000000075170000-memory.dmp
memory/1792-21-0x0000000005120000-0x0000000005130000-memory.dmp
memory/4660-0-0x0000000000080000-0x0000000000090000-memory.dmp
memory/4660-3-0x00007FFBAE1F0000-0x00007FFBAECB1000-memory.dmp
memory/4660-4-0x000000001ACD0000-0x000000001ACE0000-memory.dmp
memory/4660-16-0x00007FFBAE1F0000-0x00007FFBAECB1000-memory.dmp