Analysis
- max time kernel
898s - max time network
901s - platform
windows11-21h2_x64 - resource
win11-20260911-en - resource tags
- submitted
22/09/2026, 14:21
General
- Target MasonClient.exe
- Size 49KB
- Sample260922-rn3messs9j
- SHA256 7a7281ec920f9cec2db04b711d268cb3a1f56c559ccda8affabdec2aa6c1af86
Score
10/10
Malware Config
Extracted
Family
-
neptunerat
C2
-
fduhgnduhgd-42552.portmap.host:42552
Attributes
-
filename
USB.exe
-
group
MasonGroup
-
key
g4iwvBAV8XRPb7ng
-
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.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/4532-0-0x00000000006B0000-0x00000000006C2000-memory.dmp
memory/4532-1-0x000000001B410000-0x000000001B420000-memory.dmp
memory/4532-2-0x000000001B410000-0x000000001B420000-memory.dmp