The most interesting information in here to me by far:
> In an interesting twist, it was discovered that the Stuxnet
> malware group makes use of device drivers which were digitally
> signed to make them appear as though they originated from
> hardware vendor Realtek Semiconductor Corp. The digital
> certificate has since been revoked but it is worrying that
> malware writers seemingly had access to a private key issued to
> a trusted supplier of device drivers.