Overview

overview

10

Static

static

10

MasonClient.exe

windows10-2004-x64

10

MasonClient.exe

windows10-ltsc_2021-x64

10

Sharing

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General

  • Target
    MasonClient.exe
  • Size 49KB
  • Sample260905-yzs1pafg47
  • SHA256 032f2895668ff5f36aa7c1e1a5161e4e40464c471ae3a5dcf76add9ad9916345
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratdefense_evasionexecutionpersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • 31.6.50.206:2018

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    UnUIss63unrnamVV

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 49KB
    • SHA256 032f2895668ff5f36aa7c1e1a5161e4e40464c471ae3a5dcf76add9ad9916345
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasionexecutionneptuneratpersistencetrojan

    • 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.

    • 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