Analysis

  • max time kernel
    104s
  • max time network
    35s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260911-en
  • resource tags

    arch:x64arch:x86image:win11-20260911-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    24/09/2026, 03:09

General

  • Target
    MasonRAT-cleaned.exe
  • Size 17.2MB
  • Sample260924-dnvpxscf82
  • SHA256 010ea11733059884621eafb68bfd5d7e8c083f02581b175e37b34c0cb70fbe63
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: NeptuneRAT, MasonRAT

    NeptuneRAT aka MasonRAT is a trojan written in C#.

  • Detects NeptuneRAT stealer 1 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

Processes

  • C:\Users\Admin\AppData\Local\Temp\MasonRAT-cleaned.exe
    "C:\Users\Admin\AppData\Local\Temp\MasonRAT-cleaned.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:3840
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3840 -s 1152
      2⤵
      • Program crash
      PID:4104
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3840 -ip 3840
    1⤵
      PID:2700

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          memory/3840-0-0x00000000005F0000-0x0000000001732000-memory.dmp

          memory/3840-1-0x00000000067C0000-0x0000000006D66000-memory.dmp

          memory/3840-2-0x0000000006210000-0x00000000062A2000-memory.dmp

          memory/3840-3-0x00000000062B0000-0x000000000634C000-memory.dmp

          memory/3840-4-0x00000000061D0000-0x00000000061E0000-memory.dmp