Analysis
- max time kernel
148s - max time network
94s - platform
windows11-21h2_x64 - resource
win11-20240802-en - resource tags
- submitted
04/08/2024, 11:58
General
- Target 749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
- Size 74KB
- Sample240804-n5e1xavbpl
- SHA256 749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450
Malware Config
Extracted
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asyncrat
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Venom RAT + HVNC + Stealer + Grabber v6.0.3
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rufrwqqzhtx
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delay
1
-
install
true
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install_file
WinUpdate.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
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Delays execution with timeout.exe 1 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 64 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\749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe"C:\Users\Admin\AppData\Local\Temp\749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe"1⤵
- 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 "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"'3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7CA2.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\WinUpdate.exe"C:\Users\Admin\AppData\Roaming\WinUpdate.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
tmp7CA2.tmp.bat
DataLogs.conf
WinUpdate.exe
memory/4428-0-0x00007FFA59F33000-0x00007FFA59F35000-memory.dmp
memory/4428-1-0x00000000006B0000-0x00000000006C8000-memory.dmp
memory/4428-3-0x00007FFA59F30000-0x00007FFA5A9F2000-memory.dmp
memory/4428-4-0x00007FFA59F30000-0x00007FFA5A9F2000-memory.dmp
memory/4428-10-0x00007FFA59F30000-0x00007FFA5A9F2000-memory.dmp