General

  • Target
    MasonClient.exe
  • Size 91KB
  • Sample260820-psaq4acl8s
  • SHA256 6692c7c89786abee2e282eb91ae66d2f01097ac7c78f1c506594eeb7ccd54012
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • neptunerat

C2
  • g0zpydlusm.localto.net:8565

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    3YvAEdUHcPLh6ds3

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 91KB
    • SHA256 6692c7c89786abee2e282eb91ae66d2f01097ac7c78f1c506594eeb7ccd54012
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects DonutLoader

    • Detects NeptuneRAT stealer

    • Family: DonutLoader

      DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Command and Scripting Interpreter: PowerShell

      Powershell Invoke Web Request.

    • 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.

    • 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