Analysis
- user interaction
yes - max time kernel
80s - max time network
82s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
02/11/2026, 14:33
General
- Target ll.exe
- Size 49KB
- Sample261102-rw7lcafd52
- SHA256 679eb536ebb1f9c449027f19aa5a442f4ef6e94bce1f3a94c6c73e45b7ee2e46
Malware Config
Extracted
-
neptunerat
-
vpn823034274.softether.net:38977
-
filename
USB.exe
-
group
MasonGroup
-
key
tUt1uszof1kvDZxj
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 2 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 3 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- 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\ll.exe"C:\Users\Admin\AppData\Local\Temp\ll.exe"1⤵
- Checks computer location settings
- Reads the TCP/IP host and domain name from the registry
- 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 "ll" /tr "C:\Users\Admin\AppData\Roaming\ll.exe"2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\ll.exeC:\Users\Admin\AppData\Roaming\ll.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\ll.exeC:\Users\Admin\AppData\Roaming\ll.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\ll.exeC:\Users\Admin\AppData\Roaming\ll.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
ll.exe.log
ll.exe
memory/4540-0-0x0000000000ED0000-0x0000000000EE2000-memory.dmp
memory/4540-2-0x000000001B9E0000-0x000000001B9F0000-memory.dmp
memory/4540-6-0x000000001B9E0000-0x000000001B9F0000-memory.dmp