Analysis
- max time kernel
148s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240412-en - resource tags
- submitted
18/04/2024, 01:15
General
- Target 61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222.exe
- Size 46.7MB
- Sample240418-bme7qsgb3z
- SHA256 61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222
Malware Config
Extracted
-
asyncrat
-
0.5.6A
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dgorijan20785.hopto.org:6606
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dgorijan20785.hopto.org:7707
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dgorijan20785.hopto.org:8808
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v5tvc4rc3ex788
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delay
10
-
install
true
-
install_file
audiodrv.exe
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install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- 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 22 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 8 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\61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222.exe"C:\Users\Admin\AppData\Local\Temp\61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "'audiodrv"' /tr "'C:\Users\Admin\AppData\Roaming\audiodrv.exe"'2⤵
- Creates scheduled task(s)
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8C81.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\audiodrv.exe"C:\Users\Admin\AppData\Roaming\audiodrv.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
tmp8C81.tmp.bat
audiodrv.exe
memory/836-0-0x0000000000D10000-0x0000000000D22000-memory.dmp
memory/836-1-0x00007FF972860000-0x00007FF973321000-memory.dmp
memory/836-2-0x000000001B7F0000-0x000000001B800000-memory.dmp
memory/836-8-0x00007FF972860000-0x00007FF973321000-memory.dmp
memory/3944-12-0x00007FF9728A0000-0x00007FF973361000-memory.dmp
memory/3944-13-0x000000001BC40000-0x000000001BC50000-memory.dmp
memory/3944-14-0x00007FF9728A0000-0x00007FF973361000-memory.dmp
memory/3944-15-0x000000001BC40000-0x000000001BC50000-memory.dmp