Analysis
- user interaction
yes - max time kernel
898s - max time network
901s - platform
windows11-21h2_x64 - resource
win11-20260911-en - resource tags
- submitted
08/11/2026, 10:47
General
- Target MasonClient.exe
- Size 48KB
- Sample261108-mvrfhsbw21
- SHA256 13e130560f8e0779b442d61d378971ee05f3648f4b6de363cae00c656c97c686
Score
10/10
Malware Config
Extracted
Family
-
neptunerat
C2
-
chords-correspond.tun.ply.gg:49924
Attributes
-
filename
USB.exe
-
group
MasonGroup
-
key
oeJ3mNK5q6Rp8sBu
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 2 IoCs
- Enumerates video capture drivers 2 TTPs 1 IoCs
Queries the legacy Video for Windows capture drivers. This is commonly abused by RATs to check for available webcams on the system before reporting to their C2.
- 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⤵
- Enumerates video capture drivers
- 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/5284-0-0x00000000006E0000-0x00000000006F2000-memory.dmp
memory/5284-1-0x0000000002890000-0x00000000028A0000-memory.dmp
memory/5284-2-0x0000000002890000-0x00000000028A0000-memory.dmp