General

  • Target
    3DSeriesGG116.1.0Setup (1).rar
  • Size 403.7MB
  • Sample261103-wd3a5atzbs
  • SHA256 cf1e8c47e318fe077dc1f19a3e72f6bc380dc445574e0868006648acbcddfdce
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • neptunerat

C2
  • 82.22.62.40:666

Attributes
  • filename

    MasonUSB.exe

  • group

    MasonGroup

  • key

    PZySUSuxlU9MhXcx

  • rat_name

    MasonRAT

Targets

    • Target
      3DSeriesGG116.1.0Setup (1).rar
    • Size 403.7MB
    • SHA256 cf1e8c47e318fe077dc1f19a3e72f6bc380dc445574e0868006648acbcddfdce
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects NeptuneRAT stealer

    • Detects Umbral payload

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

    • Family: Umbral

      Umbral stealer is an open-source modular stealer written in C#.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Contacts third-party web service commonly abused for C2

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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v16

Tasks