Analysis
- max time kernel
10s - max time network
13s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
08/04/2024, 15:45
General
- Target Starter Module.exe
- Size 502KB
- Sample240408-s683lada83
- SHA256 67e35ca53e1ee18113207c2edf4b165ae9158cfed151e08bac627327f9c60f21
Malware Config
Extracted
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quasar
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1.4.0
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TRAINING
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185.241.208.185:16145
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22073971-8d9a-4364-9916-abbb09ac9d8b
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encryption_key
7A9A8376440E3257DB2B54403642F366A5FBE14A
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install_name
Starter Module.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Starter Module
-
subdirectory
Modules
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 5 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 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\Starter Module.exe"C:\Users\Admin\AppData\Local\Temp\Starter Module.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Starter Module" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Starter Module.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\system32\Modules\Starter Module.exe"C:\Windows\system32\Modules\Starter Module.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Starter Module" /sc ONLOGON /tr "C:\Windows\system32\Modules\Starter Module.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Starter Module.exe
memory/3828-8-0x00007FFC77050000-0x00007FFC77B11000-memory.dmp
memory/3828-10-0x000000001B6F0000-0x000000001B700000-memory.dmp
memory/3828-11-0x000000001C260000-0x000000001C2B0000-memory.dmp
memory/3828-12-0x000000001C370000-0x000000001C422000-memory.dmp
memory/4776-0-0x0000000000380000-0x0000000000404000-memory.dmp
memory/4776-1-0x00007FFC77050000-0x00007FFC77B11000-memory.dmp
memory/4776-2-0x000000001B310000-0x000000001B320000-memory.dmp
memory/4776-9-0x00007FFC77050000-0x00007FFC77B11000-memory.dmp