Analysis
- max time kernel
149s - max time network
152s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
22/04/2026, 14:28
General
- Target MasonClient.exe
- Size 49KB
- Sample260422-rtccescw7x
- SHA256 f380d9915c3d8810d4363ec85b4229976f3f55b420b347e039e94f4eb2a9bd96
Score
10/10
Malware Config
Extracted
Family
-
neptunerat
C2
-
yzpljhjudn.localto.net:4058
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 2 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/1112-0-0x0000000000330000-0x0000000000342000-memory.dmp
memory/1112-1-0x000000001B040000-0x000000001B050000-memory.dmp
memory/1112-2-0x0000000002420000-0x000000000242C000-memory.dmp
memory/1112-4-0x000000001AE50000-0x000000001AE59000-memory.dmp
memory/1112-6-0x000000001B040000-0x000000001B050000-memory.dmp
memory/1112-5-0x000000001AE60000-0x000000001AE72000-memory.dmp
memory/1112-3-0x000000001B450000-0x000000001B53A000-memory.dmp