General

  • Target
    stuff.exe
  • Size 16.9MB
  • Sample260831-tb4eascm6x
  • SHA256 255742e073491571083d13102efa262d36b7e765f3e5bf0231dd9d4e9ca28d54
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      stuff.exe
    • Size 16.9MB
    • SHA256 255742e073491571083d13102efa262d36b7e765f3e5bf0231dd9d4e9ca28d54
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Modifies Windows Defender DisableAntiSpyware settings

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Renames multiple (119) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Detects potential anti-termination behavior

      Detects RtlSetProcessIsCritical or NtSetInformationProcess references associated with process criticality, likely enabling anti-termination behavior that may trigger a BSOD if the process is terminated.

    • Disables one or more Microsoft Defender components

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

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    • 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.

    • Detects references to legitimate web services potentially used as dead drop resolvers

      Detects Telegram, Steam, and other legitimate web-service references that may be used to retrieve secondary C2 infrastructure.

    • Drops desktop.ini file(s)

    • 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