Analysis
- user interaction
yes - max time kernel
14s - max time network
17s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260513-en - resource tags
- submitted
04/08/2026, 19:52
General
- Target xwormExploit.exe
- Size 213KB
- Sample260804-yllz8adk3t
- SHA256 554b930e81f252ff6b23d84fa654514d141acf0a5382a5ca5c329347a9eb5b1c
Score
10/10
Malware Config
Extracted
Family
-
neptunerat
C2
-
imthereallord-36375.portmap.host:36375
Attributes
-
filename
USB.exe
-
group
MasonGroup
-
key
EPWAUIaPJOtp2i6Q
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 3 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 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).
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\xwormExploit.exe"C:\Users\Admin\AppData\Local\Temp\xwormExploit.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\77777.exe"C:\Users\Admin\AppData\Local\Temp\77777.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
77777.exe
memory/4872-17-0x00000000007D0000-0x00000000007E2000-memory.dmp
memory/4872-18-0x000000001B420000-0x000000001B430000-memory.dmp
memory/4872-19-0x000000001B420000-0x000000001B430000-memory.dmp
memory/5076-0-0x0000000000CF0000-0x0000000000D2C000-memory.dmp
memory/5076-1-0x0000000002EC0000-0x0000000002ED0000-memory.dmp