Analysis
- max time kernel
138s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
04/11/2024, 00:40
General
- Target Fpsunlocker.exe
- Size 3.1MB
- Sample241104-a1chbsyfrc
- SHA256 b70c5aea64d75fc98a82b3c88cfecc6c2856f2a4987f4c1212c3fcf866ec9c9f
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
Inversin-43597.portmap.host:43597
-
80329fd2-f063-4b06-9c7e-8dbc6278c2a3
-
encryption_key
744EA1A385FEBC6DA96387411B7000D77E66B075
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
java updater
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 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 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
-
C:\Users\Admin\AppData\Local\Temp\Fpsunlocker.exe"C:\Users\Admin\AppData\Local\Temp\Fpsunlocker.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
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 WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/1080-0-0x00007FFC53833000-0x00007FFC53835000-memory.dmp
memory/1080-1-0x0000000000670000-0x0000000000994000-memory.dmp
memory/1080-2-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp
memory/1080-8-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp
memory/4320-9-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp
memory/4320-10-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp
memory/4320-11-0x000000001C5F0000-0x000000001C640000-memory.dmp
memory/4320-12-0x000000001C700000-0x000000001C7B2000-memory.dmp
memory/4320-13-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp