General

  • Target
    2024-04-03_2337e5389081db45dd5a3758843120b9_virlock
  • Size 155KB
  • Sample240403-njs1msda27
  • SHA256 72e28253024c7646b511a5ed0c0e675dbd21983dc000a25cd073e41c76f07c71
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Targets

    • Target
      2024-04-03_2337e5389081db45dd5a3758843120b9_virlock
    • Size 155KB
    • SHA256 72e28253024c7646b511a5ed0c0e675dbd21983dc000a25cd073e41c76f07c71
    • MD5 SHA1 SHA512 SSDEEP
    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Renames multiple (83) files with added filename extension

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

    • UPX dump on OEP (original entry point)

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Adds Run key to start application

MITRE ATT&CK Enterprise v15

Tasks