General

  • Target

    2024-02-17_22c442d48aa7c9f9d35eecd0666dea14_wannacry

  • Size

    317KB

  • Sample

    240217-njj3qseb4z

  • MD5

    22c442d48aa7c9f9d35eecd0666dea14

  • SHA1

    a1fdc523787aa5c068613867d0b6c27ee40b70e1

  • SHA256

    8d20fefdcc204570b0d19b26fd99553ea89697b3646073b769466aa8ac5fc730

  • SHA512

    1d8705708afeccaaaf467d6466d0dbaa6097b2942c7b45c548175c17b771182e89c7557175b8d830ae9e721471aad20ce0902d6861ab3bb9c35a1cf334f2a308

  • SSDEEP

    1536:Ho2jYNMNXr9MaAQ/e9rh12xwpUlwhNNxI5/fbBIGbtGutFnL5iU66tDwU1yw+TN+:HojMNXr9MaAQ/eH6wp2wjW/jIIv

Malware Config

Targets

    • Target

      2024-02-17_22c442d48aa7c9f9d35eecd0666dea14_wannacry

    • Size

      317KB

    • MD5

      22c442d48aa7c9f9d35eecd0666dea14

    • SHA1

      a1fdc523787aa5c068613867d0b6c27ee40b70e1

    • SHA256

      8d20fefdcc204570b0d19b26fd99553ea89697b3646073b769466aa8ac5fc730

    • SHA512

      1d8705708afeccaaaf467d6466d0dbaa6097b2942c7b45c548175c17b771182e89c7557175b8d830ae9e721471aad20ce0902d6861ab3bb9c35a1cf334f2a308

    • SSDEEP

      1536:Ho2jYNMNXr9MaAQ/e9rh12xwpUlwhNNxI5/fbBIGbtGutFnL5iU66tDwU1yw+TN+:HojMNXr9MaAQ/eH6wp2wjW/jIIv

    • Chaos

      Ransomware family first seen in June 2021.

    • Chaos Ransomware

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Detects command variations typically used by ransomware

    • Modifies boot configuration data using bcdedit

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Drops desktop.ini file(s)

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks