General

  • Target
    5e2c9d80fa4528fe9777738a9cba9ede08cdae353fd4cb2d9caf0c9801fd5711
  • Size 134KB
  • Sample250312-2383vswwav
  • SHA256 9d2bcfa82facbaff874c61534ef4bc647ee072b218c4903e87012e1683e30bec
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\users\Public\RyukReadMe.html

  • ryuk

Ransom Note

Targets

    • Target
      5e2c9d80fa4528fe9777738a9cba9ede08cdae353fd4cb2d9caf0c9801fd5711
    • Size 134KB
    • SHA256 9d2bcfa82facbaff874c61534ef4bc647ee072b218c4903e87012e1683e30bec
    • MD5 SHA1 SHA512 SSDEEP
    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

    • Ryuk family

    • Renames multiple (2967) 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.

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

MITRE ATT&CK Enterprise v15

Tasks