Overview

overview

10

Static

static

10

MassonClient.exe

windows10-2004-x64

10

MassonClient.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    MassonClient.exe
  • Size 51KB
  • Sample260930-tmycescc66
  • SHA256 f5e2a6f21c0a809db55ac77de2ee15af75b9623170a2da06fb972f7f00e160de
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratbootkitdiscoveryexecutionpersistenceransomwaretrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • 7.tcp.vip.cpolar.cn:13366

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    N5PFd2tzBJ8ueFZr

  • rat_name

    MasonRAT

Targets

    • Target
      MassonClient.exe
    • Size 51KB
    • SHA256 f5e2a6f21c0a809db55ac77de2ee15af75b9623170a2da06fb972f7f00e160de
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    discoveryexecutionneptuneratpersistenceransomwaretrojanbootkit

    • 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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks