Analysis
- max time kernel
149s - max time network
126s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
02/11/2026, 02:55
General
- Target MasonClient.exe
- Size 53KB
- Sample261102-dekhlaev8t
- SHA256 19284b894bed03187b61d74e48078ba5a441e58b3476eb86f4370fe4b5be230e
Malware Config
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/5096-0-0x00007FF9AD9CF000-0x00007FF9AD9D0000-memory.dmp
memory/5096-1-0x0000000000400000-0x0000000000414000-memory.dmp
memory/5096-2-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp
memory/5096-3-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp
memory/5096-4-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp
memory/5096-5-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp
memory/5096-6-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp
memory/5096-7-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp
memory/5096-8-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp
memory/5096-9-0x00007FF9AD840000-0x00007FF9AE1E4000-memory.dmp