Analysis
- max time kernel
119s - max time network
103s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
28/10/2024, 16:30
General
- Target b62a8e8bbadf678bf9e62626feb5e33b298ab440102762f67948a487bfe4397bN.exe
- Size 74KB
- Sample241028-tz7fvstepp
- SHA256 b62a8e8bbadf678bf9e62626feb5e33b298ab440102762f67948a487bfe4397b
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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127.0.0.1:4449
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127.0.0.1:0
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heherherheheheherherh
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delay
1
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install
true
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install_file
explorer.exe
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install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Asyncrat family
- VenomRAT 2 IoCs
Detects VenomRAT.
- Venomrat family
- 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).
- 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 53 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\b62a8e8bbadf678bf9e62626feb5e33b298ab440102762f67948a487bfe4397bN.exe"C:\Users\Admin\AppData\Local\Temp\b62a8e8bbadf678bf9e62626feb5e33b298ab440102762f67948a487bfe4397bN.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 "explorer" /tr '"C:\Users\Admin\AppData\Roaming\explorer.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "explorer" /tr '"C:\Users\Admin\AppData\Roaming\explorer.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\tmp9B27.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\explorer.exe"C:\Users\Admin\AppData\Roaming\explorer.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
tmp9B27.tmp.bat
DataLogs.conf
explorer.exe
memory/404-0-0x00007FF98BF23000-0x00007FF98BF25000-memory.dmp
memory/404-1-0x0000000000320000-0x0000000000338000-memory.dmp
memory/404-3-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp
memory/404-8-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp
memory/404-9-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp