Analysis
- max time kernel
146s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20230221-en - resource tags
- submitted
21/03/2023, 13:26
General
- Target 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe
- Size 309KB
- Sample230321-qphszaae33
- SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
Malware Config
Extracted
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asyncrat
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0.5.7B
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Default
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127.0.0.1:6606
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127.0.0.1:7707
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127.0.0.1:8808
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127.0.0.1:1177
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jntrojan.ddns.net:6606
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jntrojan.ddns.net:7707
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jntrojan.ddns.net:8808
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jntrojan.ddns.net:1177
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AsyncMutex_6SI8OkPnk
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delay
3
-
install
true
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install_file
windows.exe
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install_folder
%Temp%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 3 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). Likely ransomware behaviour.
- 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 25 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe"C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"'3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDA57.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmpDA57.tmp.bat
windows.exe
windows.exe
memory/4456-144-0x0000000005440000-0x0000000005450000-memory.dmp
memory/4456-145-0x0000000005440000-0x0000000005450000-memory.dmp
memory/4828-133-0x00000000003B0000-0x0000000000404000-memory.dmp
memory/4828-134-0x0000000004EB0000-0x0000000004EC0000-memory.dmp
memory/4828-135-0x00000000050C0000-0x000000000515C000-memory.dmp