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General

  • Target

    2024-10-21_673052c5f2812af533c395be524487b6_virlock

  • Size

    700KB

  • Sample

    241021-c7v95awfjn

  • MD5

    673052c5f2812af533c395be524487b6

  • SHA1

    805cc98ca94c1025358775c1cfabe4a6bf289217

  • SHA256

    6182de7bff0470482b4ec0d02c5ac82013f985e838b8dd330b06b960565a7735

  • SHA512

    916e9cfce293abfa6f767bdc71ff2b447675dfd6de6053441378853909e799efeb4712b3fb6e1ce53ab2cf6a16806cecbb99cf0a23287e7678c62aeb24841e44

  • SSDEEP

    1536:HUR7z+IvOFoTuFX0Tz/OYnunsBDpbyFcbyWInkyeS9ia4sy0GaWXS+/gqbUccFQw:HUxRvgoTuFXM1nun6QnPcAbEqNsM

Malware Config

Targets

    • Target

      2024-10-21_673052c5f2812af533c395be524487b6_virlock

    • Size

      700KB

    • MD5

      673052c5f2812af533c395be524487b6

    • SHA1

      805cc98ca94c1025358775c1cfabe4a6bf289217

    • SHA256

      6182de7bff0470482b4ec0d02c5ac82013f985e838b8dd330b06b960565a7735

    • SHA512

      916e9cfce293abfa6f767bdc71ff2b447675dfd6de6053441378853909e799efeb4712b3fb6e1ce53ab2cf6a16806cecbb99cf0a23287e7678c62aeb24841e44

    • SSDEEP

      1536:HUR7z+IvOFoTuFX0Tz/OYnunsBDpbyFcbyWInkyeS9ia4sy0GaWXS+/gqbUccFQw:HUxRvgoTuFXM1nun6QnPcAbEqNsM

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Renames multiple (86) 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.

    • 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