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General

  • Target

    2024-10-16_2b1f1671c20470163d5e6172dfc87b8e_virlock

  • Size

    764KB

  • Sample

    241016-ghenasvhqb

  • MD5

    2b1f1671c20470163d5e6172dfc87b8e

  • SHA1

    54a722115724d97ad36fbb2475ae64885e81341a

  • SHA256

    efb73d5c947959641d60731c17e2abdf0a677483073021532b5453de401c8bc2

  • SHA512

    d5148f3fd472d7b1aae05fd05de4dfd02a6498c7f7bd9befc89327f489d14f41d34a3874b2c1f70858b2c9dfbe3a2863fa3b3051a56d68a25ff864a9e029f5f3

  • SSDEEP

    12288:z0FRH0SL68Sh6gvdWuF7cWhBDQkvVZiQ/FkYKt+DVI78+IbR2:E9XL686WuFAWhBVVgQNByU88+IY

Malware Config

Targets

    • Target

      2024-10-16_2b1f1671c20470163d5e6172dfc87b8e_virlock

    • Size

      764KB

    • MD5

      2b1f1671c20470163d5e6172dfc87b8e

    • SHA1

      54a722115724d97ad36fbb2475ae64885e81341a

    • SHA256

      efb73d5c947959641d60731c17e2abdf0a677483073021532b5453de401c8bc2

    • SHA512

      d5148f3fd472d7b1aae05fd05de4dfd02a6498c7f7bd9befc89327f489d14f41d34a3874b2c1f70858b2c9dfbe3a2863fa3b3051a56d68a25ff864a9e029f5f3

    • SSDEEP

      12288:z0FRH0SL68Sh6gvdWuF7cWhBDQkvVZiQ/FkYKt+DVI78+IbR2:E9XL686WuFAWhBVVgQNByU88+IY

    • Modifies WinLogon for persistence

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Renames multiple (65) 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