Early the next morning, a Saturday, he was back in the office digging through the code, focusing on the part that Stuxnet used to spread itself, and testing and documenting his findings. He came up for air midafternoon and passed his notes to Chien, who continued working through the evening. By the end of the weekend, they’d uncovered an astonishing three more zero-days.
Excellent article. One of the best out of Wired. From the comments, "like reading a Tom Clancy novel".
How Digital Detectives Deciphered Stuxnet, the Most Menacing Malware in History