General

  • Target

    2024-10-19_07540665a1eb01b36d37811081e86979_virlock

  • Size

    242KB

  • Sample

    241019-1ka8fasflm

  • MD5

    07540665a1eb01b36d37811081e86979

  • SHA1

    f9a53c87c7fd1134b79240c6ffd8fa10c20cce94

  • SHA256

    42fb691ff2822651fc1de2eb10c176320d2a97c76d824e600ba4c5df4d415a2a

  • SHA512

    81c5713ee59fe5c28b13d76267a861d975877d84a86719ddbdb8ecb254a1d537c8dcd9114e896fcde9f2012dd31750e03f8010563073bc5b75ec7fb728b53934

  • SSDEEP

    6144:K/4bt1qFQhe/l2ISLrFFt2U43wD63ak6stI:Tbt1q6he/l2ISLrFFErp4l

Malware Config

Targets

    • Target

      2024-10-19_07540665a1eb01b36d37811081e86979_virlock

    • Size

      242KB

    • MD5

      07540665a1eb01b36d37811081e86979

    • SHA1

      f9a53c87c7fd1134b79240c6ffd8fa10c20cce94

    • SHA256

      42fb691ff2822651fc1de2eb10c176320d2a97c76d824e600ba4c5df4d415a2a

    • SHA512

      81c5713ee59fe5c28b13d76267a861d975877d84a86719ddbdb8ecb254a1d537c8dcd9114e896fcde9f2012dd31750e03f8010563073bc5b75ec7fb728b53934

    • SSDEEP

      6144:K/4bt1qFQhe/l2ISLrFFt2U43wD63ak6stI:Tbt1q6he/l2ISLrFFErp4l

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Renames multiple (60) files with added filename extension

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

    • 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.

    • Adds Run key to start application

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks