General

  • Target
    boykisser.exe
  • Size 1.6MB
  • Sample260701-c9dsvsey2s
  • SHA256 e432745623e2d2665ff20e2fbeaa4667042954e42f7c4673fe6e61fc258fa809
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      boykisser.exe
    • Size 1.6MB
    • SHA256 e432745623e2d2665ff20e2fbeaa4667042954e42f7c4673fe6e61fc258fa809
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Modifies Windows Defender DisableAntiSpyware settings

    • Modifies Windows Defender Real-time Protection settings

    • Clears Windows event logs

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VirtualBox drivers on disk

    • Modifies boot configuration data using bcdedit

    • Disables Task Manager via registry modification

    • Disables one or more Microsoft Defender components

      Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

    • Looks for VMWare drivers on disk

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Disables service(s)

    • Reads user/profile data of web browsers

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

    • Stops running service(s)

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • 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