How was the information stolen? The Infostealer.Monstres Trojan runs batch searches by sending HTTP commands to the Monster Web site to navigate through folders, said Hidalgo. The malware then parses the output that appears in a pop-up window that holds the job seeker profiles that match the search criteria. Essentially, the Trojan worked as an automated search bot that located candidates, captured their contact information and sent it to a remote server controlled by the criminals. Symantec said that the server, though located in Russia, was hosted by a company out of Ukraine.
Essentially the article claims Monster was not hacked. I would claim that Monster needs to do a better job of scouring it's traffic and users and protecting those who posted resumes there in the past - like me.