Analysis
- max time kernel
144s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
07/04/2024, 07:01
General
- Target Client-built.exe
- Size 3.1MB
- Sample240407-hte9msfe4y
- SHA256 a020684317ac3536e304bd189a4885100a83951a9807b2d1b6bd1e7b42e354bc
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
predictor.serveblog.net:4782
-
755f883f-4d58-4349-bc9e-f21c4e163b6f
-
encryption_key
EE65D8F2E429F4900E3A17963595716D863A2455
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
memory/1760-9-0x00007FFA75000000-0x00007FFA75AC1000-memory.dmp
memory/1760-10-0x00000000028E0000-0x00000000028F0000-memory.dmp
memory/1760-11-0x000000001C050000-0x000000001C0A0000-memory.dmp
memory/1760-12-0x000000001C160000-0x000000001C212000-memory.dmp
memory/1760-13-0x00007FFA75000000-0x00007FFA75AC1000-memory.dmp
memory/1760-14-0x00000000028E0000-0x00000000028F0000-memory.dmp
memory/3180-0-0x0000000000990000-0x0000000000CB4000-memory.dmp
memory/3180-1-0x00007FFA75000000-0x00007FFA75AC1000-memory.dmp
memory/3180-2-0x0000000002E00000-0x0000000002E10000-memory.dmp
memory/3180-8-0x00007FFA75000000-0x00007FFA75AC1000-memory.dmp