General

  • Target
    catcrypt.exe
  • Size 16.2MB
  • Sample260922-xms99add26
  • SHA256 0b8d0c09a693b79d246b83842e42a96c569e3c162122fcd352121f593ffc29fe
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      catcrypt.exe
    • Size 16.2MB
    • SHA256 0b8d0c09a693b79d246b83842e42a96c569e3c162122fcd352121f593ffc29fe
    • 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.

    • Modifies WinLogon for persistence

    • Modifies Windows Defender DisableAntiSpyware settings

    • Modifies Windows Defender Real-time Protection settings

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Disables RegEdit via registry modification

    • Disables Task Manager via registry modification

    • Disables cmd.exe use via registry modification

    • Drops file in Drivers directory

    • Event Triggered Execution: Image File Execution Options Injection

    • Checks computer location settings

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

    • Executes dropped EXE

    • Stops running service(s)

    • Checks whether UAC is enabled

    • Indicator Removal: Clear Persistence

      Clear artifacts associated with previously established persistence like scheduletasks on a host.

    • Executes a VBScript file via the Windows Script Host.

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v16

Tasks