Analysis
- user interaction
yes - max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
03/10/2026, 18:12
General
- Target MasonClient.exe
- Size 48KB
- Sample261003-wtaaaavv9n
- SHA256 ae84d336acdfb8211c51331dc5d6401c7f1ccab402f859d980ab1b53bf08ff55
Score
10/10
Malware Config
Extracted
Family
-
neptunerat
C2
-
23.tcp.cpolar.top:11275
Attributes
-
filename
MasonUSB.exe
-
group
MasonGroup
-
key
4OI68CC5L23b0enn
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 1 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/4224-0-0x0000000000670000-0x0000000000682000-memory.dmp
memory/4224-1-0x0000000002890000-0x00000000028A0000-memory.dmp
memory/4224-2-0x0000000002890000-0x00000000028A0000-memory.dmp