Analysis
- max time kernel
149s - max time network
152s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
28/07/2026, 03:16
General
- Target MasonClient213.exe
- Size 48KB
- Sample260728-dsxp3sal4x
- SHA256 baeb473f2af5ca7bc8d4ad3c14ac8c158d6466fca4991e12483332d39a42b45d
Malware Config
Extracted
-
neptunerat
-
elokedsgdksg4444-33157.portmap.host:701
-
filename
USB.exe
-
group
MasonGroup
-
key
D03yHAQXXug1R59r
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 2 IoCs
- Executes dropped EXE 3 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 4 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\MasonClient213.exe"C:\Users\Admin\AppData\Local\Temp\MasonClient213.exe"1⤵
- 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 "MasonClient213" /tr "C:\Users\Admin\AppData\Roaming\MasonClient213.exe"2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\MasonClient213.exeC:\Users\Admin\AppData\Roaming\MasonClient213.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\MasonClient213.exe"C:\Users\Admin\AppData\Roaming\MasonClient213.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\MasonClient213.exe"C:\Users\Admin\AppData\Roaming\MasonClient213.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
MasonClient213.exe
memory/3472-3-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/3472-2-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/3472-0-0x00007FFCF55BF000-0x00007FFCF55C0000-memory.dmp
memory/3472-4-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/3472-5-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/3472-1-0x0000000000840000-0x0000000000852000-memory.dmp
memory/3472-10-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/3472-11-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/5036-7-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/5036-8-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/5036-9-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp
memory/5036-12-0x00007FFCF5430000-0x00007FFCF5DD4000-memory.dmp