Analysis
- max time kernel
150s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260710-en - resource tags
- submitted
05/09/2026, 12:36
General
- Target tst.exe
- Size 52KB
- Sample260905-ps1yaavclg
- SHA256 f400745eda95e87c80053e89803f602861d965ac426f0bba4bd85d0280dbeddb
Malware Config
Extracted
-
neptunerat
-
6.tcp.cpolar.cn:13239
-
filename
USB.exe
-
group
MasonGroup
-
key
BWLU5rLyOc7Zt2KO
-
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\tst.exe"C:\Users\Admin\AppData\Local\Temp\tst.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 "tst" /tr "C:\Users\Admin\AppData\Roaming\tst.exe"2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\tst.exeC:\Users\Admin\AppData\Roaming\tst.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\tst.exe"C:\Users\Admin\AppData\Roaming\tst.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\tst.exe"C:\Users\Admin\AppData\Roaming\tst.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tst.exe
memory/1812-9-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/1812-11-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/2944-1-0x0000000000290000-0x00000000002A4000-memory.dmp
memory/2944-0-0x00007FFA3123F000-0x00007FFA31240000-memory.dmp
memory/2944-2-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/2944-3-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/2944-4-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/2944-5-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/2944-6-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/2944-7-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp
memory/2944-10-0x00007FFA310B0000-0x00007FFA31A54000-memory.dmp