Analysis
- max time kernel
898s - max time network
902s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
22/09/2026, 14:21
General
- Target MasonClient.exe
- Size 49KB
- Sample260922-rn3messs9j
- SHA256 7a7281ec920f9cec2db04b711d268cb3a1f56c559ccda8affabdec2aa6c1af86
Malware Config
Extracted
-
neptunerat
-
fduhgnduhgd-42552.portmap.host:42552
-
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
-
C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k GPSvcGroup1⤵
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C:\Windows\System32\SecurityHealthHost.exe\\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding1⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/5504-0-0x00007FFEFB8BF000-0x00007FFEFB8C0000-memory.dmp
memory/5504-1-0x0000000000120000-0x0000000000132000-memory.dmp
memory/5504-2-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-3-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-4-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-5-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-6-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-7-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-8-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-9-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-10-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-11-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-12-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-13-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp
memory/5504-14-0x00007FFEFB730000-0x00007FFEFC0D4000-memory.dmp