General

  • Target

    2024-04-03_fcae4b3ff43c32e4e3c7b8e3f97cab86_virlock

  • Size

    111KB

  • Sample

    240403-mnnfaacf56

  • MD5

    fcae4b3ff43c32e4e3c7b8e3f97cab86

  • SHA1

    23a2ccb9e19103ee725f0e9648fc26f6e264fb44

  • SHA256

    c73a86117863dd382b1bf3b47cc95d79b111fadff9665e82193d265b5437a6d7

  • SHA512

    b03c4755b079d783c690c29c0200b9dbc9b971f193c26adc6f5faa307c72251fbfef430bf103ed76db04d44e14c1a834b1fe59c575d7775edde6bbc04420fa56

  • SSDEEP

    1536:G816PIW+BIpLV1r1K06qmiFMt6wCjZx8RYE0MaVhH0pkL38gcMsylrEnf7cuKaKM:GSd61rl77ZjZCYE4VMk73rEf75KDM

Malware Config

Targets

    • Target

      2024-04-03_fcae4b3ff43c32e4e3c7b8e3f97cab86_virlock

    • Size

      111KB

    • MD5

      fcae4b3ff43c32e4e3c7b8e3f97cab86

    • SHA1

      23a2ccb9e19103ee725f0e9648fc26f6e264fb44

    • SHA256

      c73a86117863dd382b1bf3b47cc95d79b111fadff9665e82193d265b5437a6d7

    • SHA512

      b03c4755b079d783c690c29c0200b9dbc9b971f193c26adc6f5faa307c72251fbfef430bf103ed76db04d44e14c1a834b1fe59c575d7775edde6bbc04420fa56

    • SSDEEP

      1536:G816PIW+BIpLV1r1K06qmiFMt6wCjZx8RYE0MaVhH0pkL38gcMsylrEnf7cuKaKM:GSd61rl77ZjZCYE4VMk73rEf75KDM

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Renames multiple (78) 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