Analysis
- user interaction
yes - max time kernel
7s - max time network
10s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
04/08/2026, 10:11
General
- Target masonclient.exe
- Size 375KB
- Sample260804-l8brjsszhy
- SHA256 fa810de277e10d2e363ecc96eb78a89d3dea575c8d77e4defaccae9a02024037
Malware Config
Signatures
- .NET Reactor proctector 64 IoCs
Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 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).
- System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- 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 2 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\masonclient.exe"C:\Users\Admin\AppData\Local\Temp\masonclient.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "masonclient" /tr "C:\Users\Admin\AppData\Roaming\masonclient.exe"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\masonclient.exeC:\Users\Admin\AppData\Roaming\masonclient.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\masonclient.exeC:\Users\Admin\AppData\Roaming\masonclient.exe1⤵
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
masonclient.exe
memory/3684-1814-0x0000000005480000-0x0000000005490000-memory.dmp
memory/3684-1813-0x0000000005480000-0x0000000005490000-memory.dmp
memory/3684-1812-0x0000000005480000-0x0000000005490000-memory.dmp
memory/3684-3618-0x0000000005480000-0x0000000005490000-memory.dmp
memory/4340-80-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-70-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-2-0x0000000005210000-0x0000000005220000-memory.dmp
memory/4340-3-0x00000000057D0000-0x0000000005D74000-memory.dmp
memory/4340-4-0x0000000005110000-0x0000000005194000-memory.dmp
memory/4340-10-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-5-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-20-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-78-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-130-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-128-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-126-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-124-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-122-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-120-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-118-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-116-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-114-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-112-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-110-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-108-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-106-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-104-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-102-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-100-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-72-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-96-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-94-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-92-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-90-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-88-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-86-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-84-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-0-0x0000000005210000-0x0000000005220000-memory.dmp
memory/4340-82-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-1-0x0000000005090000-0x0000000005114000-memory.dmp
memory/4340-98-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-76-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-68-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-66-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-62-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-60-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-58-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-56-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-54-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-50-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-48-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-46-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-44-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-42-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-40-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-36-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-34-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-33-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-30-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-28-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-26-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-24-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-18-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-16-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-14-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-12-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-8-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-6-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-74-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-64-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-52-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-38-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-22-0x0000000005110000-0x000000000518D000-memory.dmp
memory/4340-1807-0x0000000005210000-0x0000000005220000-memory.dmp
memory/4340-1808-0x00000000052C0000-0x000000000535C000-memory.dmp
memory/4340-3617-0x0000000005210000-0x0000000005220000-memory.dmp