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General

  • Target

    2024-02-18_77005e43ebb1055cbb64b22c636dfd5b_virlock

  • Size

    255KB

  • Sample

    240218-nz2mqaab34

  • MD5

    77005e43ebb1055cbb64b22c636dfd5b

  • SHA1

    444870edf859f2aab0ec85a566981783688f6f32

  • SHA256

    f80417872955417f0eac97931092a1f6545e5d223e010e3bbd399c5d8fd4be14

  • SHA512

    7687b3bd96c80a0cf10ddf2001ef3ec55f7a18571ae04fbd9156316b12920cdeb0e768ad4ed8a41646442f5ad4c62c313fce0c5e5b8e47438e1f7fed6e7f4652

  • SSDEEP

    3072:Tv7gfM6gll7C4mj86x+COWsfeIFw06kEa4GCHawhEDjSji:vgfM627SvkjWUeM0H7EDjB

Malware Config

Targets

    • Target

      2024-02-18_77005e43ebb1055cbb64b22c636dfd5b_virlock

    • Size

      255KB

    • MD5

      77005e43ebb1055cbb64b22c636dfd5b

    • SHA1

      444870edf859f2aab0ec85a566981783688f6f32

    • SHA256

      f80417872955417f0eac97931092a1f6545e5d223e010e3bbd399c5d8fd4be14

    • SHA512

      7687b3bd96c80a0cf10ddf2001ef3ec55f7a18571ae04fbd9156316b12920cdeb0e768ad4ed8a41646442f5ad4c62c313fce0c5e5b8e47438e1f7fed6e7f4652

    • SSDEEP

      3072:Tv7gfM6gll7C4mj86x+COWsfeIFw06kEa4GCHawhEDjSji:vgfM627SvkjWUeM0H7EDjB

    • 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.

    • 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