Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20251015-en - resource tags
- submitted
03/12/2025, 03:50
General
- Target Client-built.exe
- Size 3.1MB
- Sample251203-ed3s8aem4w
- SHA256 a7148acaabcee8323ea08dc1c3547c79cd0cab58a7b30a6bff16e721c194c9cf
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
types-pleasant.gl.at.ply.gg:16069
-
8348afa8-6874-4df0-9ff3-b02457f148c3
-
encryption_key
A7D7E98D2F301EFE5D64D9FF6A3078AA57A2047B
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
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 family
- Quasar payload 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 1 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
-
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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
memory/2000-0-0x00000000002A0000-0x00000000005C4000-memory.dmp
memory/2000-1-0x000000001C920000-0x000000001C930000-memory.dmp
memory/2000-2-0x000000001D820000-0x000000001D870000-memory.dmp
memory/2000-3-0x000000001D930000-0x000000001D9E2000-memory.dmp
memory/2000-6-0x000000001C920000-0x000000001C930000-memory.dmp