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

Sharing

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General

  • Target
    MasonClient.exe
  • Size 48KB
  • Sample260824-j5eypace67
  • SHA256 a5a62e8c26dc78c3841c7f8b1fc278e1dd0886223ac1a8cf9865443b01f45e00
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratdiscoveryexecutionpersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • 24.tcp.cpolar.top:13589

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    q4fYbPO4E8UvmPDd

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 48KB
    • SHA256 a5a62e8c26dc78c3841c7f8b1fc278e1dd0886223ac1a8cf9865443b01f45e00
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    executionneptuneratpersistencetrojandiscovery

    • 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

    behavioral1behavioral2behavioral3

MITRE ATT&CK Enterprise v16

Tasks