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 48KB
  • Sample261012-1e56ma1vgx
  • SHA256 bf255b6fd814b46ee06f6e15a320634d249824e12c8e994994ad3ea213f01fd6
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratdefense_evasiondiscoveryexecutionpersistenceransomwaretrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • 23.tcp.cpolar.top:12695

Attributes
  • filename

    MasonUSB.exe

  • group

    MasonGroup

  • key

    kpSKh8n4GQaYuoin

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 48KB
    • SHA256 bf255b6fd814b46ee06f6e15a320634d249824e12c8e994994ad3ea213f01fd6
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryexecutionneptuneratpersistenceransomwaretrojan

    • 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

    • Drops desktop.ini file(s)

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks