stuxnet

Last week, Rick Kaun in his blog “[In]security Culture”, blasted the “security vendors” who were claiming that if the ICS/SCADA world used their offering, we would have avoided the whole Stuxnet mess. As Rick very correctly points out, this is complete rubbish - there is no silver bullet for security in general, but in the Stuxnet case it is dangerously inaccurate.

I have just come back from three very interesting presentations by Symantec, Microsoft and Kaspersky Labs at the Virus Bulletin 2010 conference. For two hours they discussed their latest findings on Stuxnet, the PLC/SCADA-targeting worm of the decade.

Week after week, the Stuxnet worm continues to amuse and astound all of us that have studied it. Last week it was Ralph Langner’s detailed analysis that showed Stuxnet wasn’t just infecting Windows boxes and stealing data, it was specifically designed to modify PLC logic so it could destroy a physical process. Next it is the amazing number of Windows zero-day vulnerabilities* it exploits to do its dirty work.

Back in July when Stuxnet first became public, I wrote in our Siemens PCS7 WinCC Malware White Paper and told anyone that would listen that Stuxnet was targeted at stealing intellectual property from process systems. The code we analyzed showed Stuxnet performing SQL database accesses and process information uploading to servers in Denmark and Malaysia, so this seemed like a sure answer.