Analysis
- user interaction
yes - max time kernel
206s - max time network
216s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
07/09/2026, 06:03
Errors
General
- Target MasonClientt.exe
- Size 48KB
- Sample260907-gsbdmaxzds
- SHA256 30a6a415c8d52a4f4a236242d1ff03fd1873c0e12099eef776756e8ae880f2ca
Malware Config
Extracted
-
neptunerat
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tqdclbdloe.localto.net:1967
-
filename
USB.exe
-
group
MasonGroup
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key
cZR1msl8Oa06S4BY
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rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 2 IoCs
- Executes dropped EXE 9 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 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 behavior: EnumeratesProcesses 25 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 5 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
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C:\Users\Admin\AppData\Local\Temp\MasonClientt.exe"C:\Users\Admin\AppData\Local\Temp\MasonClientt.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "MasonClientt" /tr "C:\Users\Admin\AppData\Roaming\MasonClientt.exe"2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Local\Temp\tmp119B.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp119B.tmp.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\MBR2.exe"C:\Users\Admin\AppData\Local\Temp\MBR2.exe"3⤵
- Executes dropped EXE
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C:\Windows\System32\MatrixMBR.exe"C:\Windows\System32\MatrixMBR.exe"4⤵
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C:\Users\Admin\AppData\Local\Temp\GDI.exe"C:\Users\Admin\AppData\Local\Temp\GDI.exe"5⤵
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C:\Users\Admin\AppData\Local\Temp\MBR.exe"C:\Users\Admin\AppData\Local\Temp\MBR.exe"5⤵
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-
-
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C:\Users\Admin\AppData\Local\Temp\TROLL5.exe"C:\Users\Admin\AppData\Local\Temp\TROLL5.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\TROLL2.exe"C:\Users\Admin\AppData\Local\Temp\TROLL2.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
-
-
C:\Users\Admin\AppData\Roaming\MasonClientt.exeC:\Users\Admin\AppData\Roaming\MasonClientt.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\MasonClientt.exe"C:\Users\Admin\AppData\Roaming\MasonClientt.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\MasonClientt.exe"C:\Users\Admin\AppData\Roaming\MasonClientt.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\MasonClientt.exe"C:\Users\Admin\AppData\Roaming\MasonClientt.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\MasonClientt.exe"C:\Users\Admin\AppData\Roaming\MasonClientt.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x00000000000004F0 0x00000000000004F41⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
GDI.exe
MBR.exe
MBR2.exe
TROLL2.exe
TROLL5.exe
tmp119B.tmp.exe
MasonClientt.exe
MatrixMBR.exe
memory/720-39-0x0000000000CA0000-0x0000000000CDA000-memory.dmp
memory/1112-80-0x0000000000780000-0x0000000000788000-memory.dmp
memory/2480-6-0x00007FF844A10000-0x00007FF8453B4000-memory.dmp
memory/2480-7-0x00007FF844A10000-0x00007FF8453B4000-memory.dmp
memory/2480-0-0x00007FF844B9F000-0x00007FF844BA0000-memory.dmp
memory/2480-12-0x00000000015C0000-0x00000000015CA000-memory.dmp
memory/2480-4-0x00007FF844A10000-0x00007FF8453B4000-memory.dmp
memory/2480-10-0x00000000014C0000-0x00000000014CE000-memory.dmp
memory/2480-3-0x00007FF844A10000-0x00007FF8453B4000-memory.dmp
memory/2480-2-0x00007FF844A10000-0x00007FF8453B4000-memory.dmp
memory/2480-1-0x0000000000CF0000-0x0000000000D02000-memory.dmp
memory/4116-66-0x0000000000400000-0x000000000041D000-memory.dmp
memory/4680-65-0x00000000009A0000-0x00000000009E6000-memory.dmp
memory/4788-23-0x000000001B2A0000-0x000000001B384000-memory.dmp
memory/4788-22-0x00000000002C0000-0x00000000003AC000-memory.dmp
memory/6072-55-0x0000000004C40000-0x0000000004C4A000-memory.dmp
memory/6072-54-0x0000000004C60000-0x0000000004CF2000-memory.dmp
memory/6072-53-0x0000000005220000-0x00000000057DA000-memory.dmp
memory/6072-52-0x00000000001B0000-0x0000000000268000-memory.dmp