Overview

overview

10

Static

static

10

MasonClient.exe

windows10-2004-x64

10

MasonClient.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    MasonClient.exe
  • Size 52KB
  • Sample260804-w1b3fsfb62
  • SHA256 95affb738568432dd10d92083348a40b84bfc0b13af01c96a7b8381f1957f322
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratexecutionpersistencetrojan

Malware Config

Targets

    • Target
      MasonClient.exe
    • Size 52KB
    • SHA256 95affb738568432dd10d92083348a40b84bfc0b13af01c96a7b8381f1957f322
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    executionneptuneratpersistencetrojan

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

      trojanneptunerat

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks