Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
19/06/2024, 01:52
General
- Target f7d1b2ecb7f47ed1311ed562bd1565f2e849d26e0c076e6ec6125d535bf17c11.exe
- Size 1.1MB
- Sample240619-cafhea1hqa
- SHA256 f7d1b2ecb7f47ed1311ed562bd1565f2e849d26e0c076e6ec6125d535bf17c11
Malware Config
Extracted
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asyncrat
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Default
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127.0.0.1:7771
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127.0.0.1:39377
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doffuovouvvufoz97964d-39377.portmap.host:7771
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doffuovouvvufoz97964d-39377.portmap.host:39377
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delay
1
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install
true
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install_file
lulz.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
- Detects executables attemping to enumerate video devices using WMI 3 IoCs
- Detects executables containing the string DcRatBy 3 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 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 23 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
- Suspicious use of WriteProcessMemory 12 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\f7d1b2ecb7f47ed1311ed562bd1565f2e849d26e0c076e6ec6125d535bf17c11.exe"C:\Users\Admin\AppData\Local\Temp\f7d1b2ecb7f47ed1311ed562bd1565f2e849d26e0c076e6ec6125d535bf17c11.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Infected.exe"C:\Users\Admin\AppData\Local\Temp\Infected.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- 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 "lulz" /tr '"C:\Users\Admin\AppData\Roaming\lulz.exe"' & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "lulz" /tr '"C:\Users\Admin\AppData\Roaming\lulz.exe"'4⤵
- 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\tmp53CD.tmp.bat""3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\timeout.exetimeout 34⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Roaming\lulz.exe"C:\Users\Admin\AppData\Roaming\lulz.exe"4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Infected.exe
tmp53CD.tmp.bat
memory/2948-25-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp
memory/2948-20-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp
memory/2948-19-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp
memory/2948-18-0x0000000000FF0000-0x0000000001006000-memory.dmp
memory/4296-3-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp
memory/4296-7-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp
memory/4296-6-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp
memory/4296-4-0x00000250721A0000-0x000002507226C000-memory.dmp
memory/4296-0-0x00007FF99AA53000-0x00007FF99AA55000-memory.dmp
memory/4296-2-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp
memory/4296-1-0x000002506CD50000-0x000002506CE70000-memory.dmp
memory/4296-30-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp