Analysis
- user interaction
yes - max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
27/09/2026, 15:21
General
- Target MasonClient.exe
- Size 49KB
- Sample260927-srcqvasxgw
- SHA256 0f732e56b58387f8cb7d3697d1934fe0fef0ff297c7838af3b6b0be5dca56d43
Score
10/10
Malware Config
Extracted
Family
-
neptunerat
Attributes
-
filename
USB.exe
-
group
MasonGroup
-
key
1Jx71V2xevvqQW5r
-
private_ip
192.168.56.1:7771
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 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.
- 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/4592-0-0x0000000000CF0000-0x0000000000D02000-memory.dmp
memory/4592-1-0x000000001B9C0000-0x000000001B9D0000-memory.dmp
memory/4592-2-0x000000001B9C0000-0x000000001B9D0000-memory.dmp