Overview

overview

10

Static

static

10

MasonClient.exe

windows11-ltsc_2024-x64

10

MasonClient.exe

windows10-2004-x64

10

MasonClient.exe

windows10-ltsc_2021-x64

10

MasonClient.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    MasonClient.exe_pw_infected (1).zip
  • Size 21KB
  • Sample260916-l3x3laydmc
  • SHA256 36fcc19b5ff5bef2051ed5e80b2ea683caa555d7c31513c420fa1b331ad17621
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratxwormexecutionpersistencerattrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • 89.190.158.37:911

Attributes
  • filename

    USB.exe

  • group

    <Neptune>

  • key

    3C62Outx4Gy0Zewc

  • rat_name

    <123456789>

Targets

    • Target
      MasonClient.exe
    • Size 48KB
    • SHA256 0868ade302ddc24703049e4274d51c6f0295e4007ed4de11c910ee5a40f44ec0
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    executionneptuneratxwormpersistencerattrojan

    • Detect Xworm Payload

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

      trojanneptunerat

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

      trojanratxworm

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Contacts third-party web service commonly abused for C2

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

    behavioral1behavioral2behavioral3behavioral4

MITRE ATT&CK Enterprise v16

Tasks