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

Resubmissions

15/04/2026, 18:51

260415-xhssxsgx3j10

15/04/2026, 18:46

260415-xepbbsa19110

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General

  • Target
    MasonClient.exe
  • Size 49KB
  • Sample260415-xepbbsa191
  • SHA256 4b361c4f5b2dae48be44036c2d484244a678c0fa58bc0d3bd38bf2a9564ded72
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratdiscoveryransomwaretrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • 4oyai0loeu.localto.net:8822

Targets

    • Target
      MasonClient.exe
    • Size 49KB
    • SHA256 4b361c4f5b2dae48be44036c2d484244a678c0fa58bc0d3bd38bf2a9564ded72
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    neptunerattrojandiscoveryransomware

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

      trojanneptunerat

    • Contacts third-party web service commonly abused for C2

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

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2behavioral3

MITRE ATT&CK Enterprise v16

Tasks