Apple has fought back against the Mac Defender malware with a fast update to its Snow Leopard XProtect security engine.



From v3.co.uk:

The SANS Institute has confirmed the update, and says that any future malware signatures added to the engine will be easy to recognise.

"OS X heavily relies on XML files for configuration. These 'plist' files are easy to read," blogged SANS chief research officer Johannes Ullrich.

  Apple issues first daily malware update to fix Mac Defender