Analysis
- max time kernel
149s - max time network
128s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
02/11/2026, 03:03
General
- Target MasonClient.exe
- Size 1.6MB
- Sample261102-dj4f9sea34
- SHA256 97e44dcd27124f2785492130e20e3be25fd71f237a8856a5a9b48ce511dc28b0
Malware Config
Extracted
-
neptunerat
-
23.tcp.cpolar.top:12649
-
filename
USB.exe
-
group
MasonGroup
-
key
JQWNoouRqGMSFLGi
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 1 IoCs
- Looks up external IP address via web service 1 TTPs 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"1⤵
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/5844-1-0x0000000000AD0000-0x0000000000C70000-memory.dmp
memory/5844-0-0x00007FFFC824F000-0x00007FFFC8250000-memory.dmp
memory/5844-2-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-3-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-4-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-5-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-6-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-7-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-8-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-9-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-10-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp
memory/5844-11-0x00007FFFC80C0000-0x00007FFFC8A64000-memory.dmp