General

  • Target
    MasosnClient.exe
  • Size 49KB
  • Sample260718-hst2eaez4w
  • SHA256 f6fc76f47e5ac1ea1abd9ba9b8f826e54ab2ee402b7d4f2a87eb779b5984d9b2
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • neptunerat

C2
  • 30.tcp.cpolar.top:12558

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    USmFoVvVsJx5YJiH

  • rat_name

    MasonRAT

Targets

    • Target
      MasosnClient.exe
    • Size 49KB
    • SHA256 f6fc76f47e5ac1ea1abd9ba9b8f826e54ab2ee402b7d4f2a87eb779b5984d9b2
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Modifies system executable filetype association

    • Contacts third-party web service commonly abused for C2

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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

MITRE ATT&CK Enterprise v16

Tasks