Analysis
- max time kernel
125s - max time network
130s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260710-en - resource tags
- submitted
31/07/2026, 04:16
Errors
General
- Target MasonClient.exe
- Size 84KB
- Sample260731-ewbgpace46
- SHA256 0f334c5f01b11906f55d1868d226c9ef186b956c8993f66567a0467eb8c934ac
Malware Config
Extracted
-
neptunerat
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24.tcp.cpolar.top:13555
-
filename
USB.exe
-
group
MasonGroup
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key
vqZC9Fy1QboOrCXC
-
rat_name
MasonRAT
Signatures
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects DonutLoader 1 IoCs
- Detects NeptuneRAT stealer 2 IoCs
- Executes dropped EXE 9 IoCs
- Drops file in System32 directory 2 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 6 IoCs
- Suspicious use of WriteProcessMemory 7 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\MasonClient.exe"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- 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 "MasonClient" /tr "C:\Users\Admin\AppData\Roaming\MasonClient.exe"2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Local\Temp\tmpF732.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmpF732.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
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\MatrixMBR.exe"C:\Windows\System32\MatrixMBR.exe"4⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\GDI.exe"C:\Users\Admin\AppData\Local\Temp\GDI.exe"5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
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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
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C:\Users\Admin\AppData\Roaming\MasonClient.exeC:\Users\Admin\AppData\Roaming\MasonClient.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\MasonClient.exe"C:\Users\Admin\AppData\Roaming\MasonClient.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\MasonClient.exe"C:\Users\Admin\AppData\Roaming\MasonClient.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x00000000000004C4 0x00000000000004CC1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
GDI.exe
MBR.exe
MBR2.exe
TROLL2.exe
TROLL5.exe
tmpF732.tmp.exe
MasonClient.exe
MatrixMBR.exe
memory/424-83-0x0000000000400000-0x000000000041D000-memory.dmp
memory/2156-56-0x0000000000880000-0x00000000008BA000-memory.dmp
memory/2308-16-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/2308-18-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/2308-15-0x0000000002FD0000-0x0000000002FE2000-memory.dmp
memory/4512-97-0x00000000002D0000-0x00000000002D8000-memory.dmp
memory/4644-70-0x00000000055C0000-0x0000000005B7A000-memory.dmp
memory/4644-69-0x00000000005E0000-0x0000000000698000-memory.dmp
memory/4644-71-0x00000000050A0000-0x0000000005132000-memory.dmp
memory/4644-72-0x0000000005090000-0x000000000509A000-memory.dmp
memory/4872-35-0x00000000005D0000-0x00000000006BC000-memory.dmp
memory/4872-39-0x000000001B530000-0x000000001B614000-memory.dmp
memory/5656-10-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-9-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-21-0x000000001B1F0000-0x000000001B1F8000-memory.dmp
memory/5656-20-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-19-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-14-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-0-0x0000000000240000-0x000000000025C000-memory.dmp
memory/5656-26-0x000000001B840000-0x000000001B848000-memory.dmp
memory/5656-8-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-7-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-6-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-2-0x0000000002380000-0x0000000002394000-memory.dmp
memory/5656-5-0x00000000024E0000-0x00000000024F2000-memory.dmp
memory/5656-4-0x00007FF95B9B0000-0x00007FF95C354000-memory.dmp
memory/5656-3-0x00007FF95BB3F000-0x00007FF95BB40000-memory.dmp
memory/5676-82-0x0000000000050000-0x0000000000096000-memory.dmp