Overview

overview

10

Static

static

10

MasonClient.exe

windows10-2004-x64

10

MasonClient.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    MasonClient.exe
  • Size 49KB
  • Sample260803-vm9wwsterg
  • SHA256 fecb2a7cac3901e64f88f893245165bdc927df6fef838e29e559d3a81a14263b
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratexecutionpersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • buk-62003.portmap.host:62003

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    6iRkBA4qFCKsKsw4

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 49KB
    • SHA256 fecb2a7cac3901e64f88f893245165bdc927df6fef838e29e559d3a81a14263b
    • 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