Penurious Penguin writes "The Wall Street Journal, in correspondence with Chevron representatives, reveals that back in 2010, Stuxnet reached Chevron, where it managed to infect — but not significantly affect — the oil giant's network. According to a Chevron representative speaking to CNET, the issue was 'immediately addressed ... without incident.' The Stuxnet worm is believed to be the work of the U.S. and Israel, and this report is confirmation that it struck well wide of its intended targets. Chevron's general manager of the earth sciences department, Mark Koelmel, said to CIO Journal, 'I don't think the U.S. government even realized how far it had spread ... I think the downside of what they did is going to be far worse than what they actually accomplished.'"