• Virus is 32bit, with a compressed size of 12800 bytes and is a minor variant to W32/Opaserv.A
  • Virus icon is that of a standard 32bit executable
  • Virus attempts to connect to and update itself however the hard-coded URL is no longer available
  • Virus copies itself to the Windows folder as Marco!.scr and modifies the registry to load at Windows startup -
    cronos = Windows\Marco!.scr

  • The virus will attempt to use SMB through NetBIOS seeking machines on the same IP subnet
  • The virus will scan IP addresses within the same domain for other shares, using NetBIOS via TCP port 137, seeking systems with open shares
  • If a system is found with an open share, the virus will copy itself to that machine in the Windows folder as Marco!.scr

  • The virus will modify the WIN.INI configuration file to load the dropped virus at Windows startup via an additional configuration file named "gay.ini" -


    The configuration file "gay.ini" contains an instruction to run "Marco!.scr" via "run="