Overview

overview

10

Static

static

10

MasonClien.exe

windows10-2004-x64

10

MasonClien.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    MasonClien.exe
  • Size 49KB
  • Sample260721-ctpv7act8j
  • SHA256 ac37eefe01a2e37c74ad554b78585205661f93f53ac40db386fd4e7d456fa694
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratexecutionpersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • russn-48812.portmap.host:48812

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    FMyLVvjBTyADMJTG

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClien.exe
    • Size 49KB
    • SHA256 ac37eefe01a2e37c74ad554b78585205661f93f53ac40db386fd4e7d456fa694
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    executionneptuneratpersistencetrojan

    • 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

    • Contacts third-party web service commonly abused for C2

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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks