Iran has already been hit by Flame, Duqu, and Stuxnet. Now we are learning of a more mysterious attack against Iran’s oil infrastructure by malware called “Wiper:”

Wiper was an aggressive piece of malware that targeted machines belonging to the Iranian Oil Ministry and the National Iranian Oil Company in April.

…No one has ever found a sample of Wiper in order to study its code and determine exactly what it did to machines in Iran, but Kaspersky did obtain mirror images of “dozens” of hard drives that had been hit by the malware.