Overview

overview

10

Static

static

10

MasonClient.exe

windows10-2004-x64

10

MasonClient.exe

windows10-ltsc_2021-x64

10

MasonClient.exe

windows11-21h2-x64

10

MasonClient.exe

windows11-ltsc_2024-x64

10

Sharing

Copy URL Twitter E-mail

General

  • Target
    MasonClient.exe
  • Size 48KB
  • Sample260923-3m4zmsgc95
  • SHA256 b9cdd113799ba3b6f22bc5ed593a71a61f37429b14af020a2acbed2eab6686a8
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratexecutionpersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • h2ackercypranos-49474.portmap.host:49474

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    OWKlVlNZmydAbDUL

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 48KB
    • SHA256 b9cdd113799ba3b6f22bc5ed593a71a61f37429b14af020a2acbed2eab6686a8
    • 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

    behavioral1behavioral2behavioral3behavioral4

MITRE ATT&CK Enterprise v16

Tasks