General

  • Target
    kizo.exe
  • Size 84KB
  • Sample260731-aqhatstscx
  • SHA256 1971e5fc0bb89dcfc26a042c91d7ccb157ffa7a5877bce3f5f0f25d7b19dccea
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • neptunerat

C2
  • 8.tcp.cpolar.top:11836

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    0c1t0BCxhtJbi3ZC

  • rat_name

    MasonRAT

Targets

    • Target
      kizo.exe
    • Size 84KB
    • SHA256 1971e5fc0bb89dcfc26a042c91d7ccb157ffa7a5877bce3f5f0f25d7b19dccea
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • 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#.

    • Modifies Windows Defender Real-time Protection settings

    • Disables Task Manager via registry modification

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Disables service(s)

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Uses the VBS compiler for execution

    • Drops desktop.ini file(s)

    • Writes to the Master Boot Record (MBR)

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

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v16

Tasks