Analysis
- user interaction
yes - max time kernel
92s - max time network
94s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
- submitted
06/06/2026, 20:17
General
- Target MasonClient.exe
- Size 48KB
- Sample260606-y2vbjacv51
- SHA256 e9dba4aa8af05a323c137737a56d918b01ea870afa6ad517cfcc3bf5c4539d7e
Score
7/10
Malware Config
Signatures
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 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 3 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\MasonClient.exe"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "MasonClient" /tr "C:\Users\Admin\AppData\Roaming\MasonClient.exe"2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\MasonClient.exeC:\Users\Admin\AppData\Roaming\MasonClient.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\MasonClient.exeC:\Users\Admin\AppData\Roaming\MasonClient.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
MasonClient.exe.log
MasonClient.exe
memory/5060-0-0x0000000000930000-0x0000000000942000-memory.dmp
memory/5060-2-0x000000001B490000-0x000000001B4A0000-memory.dmp
memory/5060-6-0x000000001C4D0000-0x000000001C4D8000-memory.dmp
memory/5060-7-0x000000001B490000-0x000000001B4A0000-memory.dmp