General

  • Target
    d2c47b1c94e6beadbc222771e788e9dafe194c462760b0d16cd25cbc0a572a00.bin.sample.gz
  • Size 100KB
  • Sample220529-wwbacscgfj
  • SHA256 b3c495a36fea5be7069701fc373d83739aa721b87aac18c3abc390d836500047
  • MD5 SHA1 SHA512

Malware Config

Targets

    • Target
      sample
    • Size 1.8MB
    • SHA256 d2c47b1c94e6beadbc222771e788e9dafe194c462760b0d16cd25cbc0a572a00
    • MD5 SHA1 SHA512
    • Modifies WinLogon for persistence

    • Modifies system executable filetype association

    • UAC bypass

    • Clears Windows event logs

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Modifies boot configuration data using bcdedit

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

    • Disables Task Manager via registry modification

    • Disables use of System Restore points

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

    • Checks computer location settings

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

    • Deletes itself

    • Drops startup file

    • Reads user/profile data of web browsers

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

    • Drops desktop.ini file(s)

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v6

Tasks