Analysis
- max time kernel
149s - max time network
153s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
15/04/2026, 18:46
General
- Target MasonClient.exe
- Size 49KB
- Sample260415-xepbbsa191
- SHA256 4b361c4f5b2dae48be44036c2d484244a678c0fa58bc0d3bd38bf2a9564ded72
Score
10/10
Malware Config
Extracted
Family
-
neptunerat
C2
-
4oyai0loeu.localto.net:8822
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/5088-0-0x0000000000F60000-0x0000000000F72000-memory.dmp
memory/5088-1-0x000000001BE50000-0x000000001BE60000-memory.dmp
memory/5088-2-0x0000000003040000-0x000000000304C000-memory.dmp
memory/5088-3-0x0000000003090000-0x00000000030A2000-memory.dmp
memory/5088-4-0x000000001BE50000-0x000000001BE60000-memory.dmp