Database Hackers Reveal Tactics: This is a Wired article about the LexisNexis hack. In it, one of the hackers explains how they turned the tables on a policeman doing undercover work in a chat room looking for sex offenders.
A friend of Krazed [a hacker pseudonym] masqueraded as a 14-year-old girl online and engaged a Florida police officer in a chat session, the hackers said. Krazed sent the officer an attachment, which he said was a slideshow containing naked pictures of the girl he was pretending to be. When the officer clicked on it, a Trojan horse downloaded silently to his computer, which gave Krazed complete access to the computer’s files.
I suppose the cop — who should have known better — would have clicked on an executable because he was looking for incriminating evidence.