Jesse William McGraw pleaded guilty Friday to two counts of transmitting malicious code, the U.S. Department of Justice (DoJ) said in a statement.

The 25-year-old hacker wasn't hard to catch; he posted videos of his misadventures to YouTube. In , he pretends to break into the hospital, saying he's "infiltrated a very large corporate office," and proceeds to install botnet code on a nurse's station computer. The theme music to the movie "Mission:Impossible" plays in the background as he tells viewers, "You're on a mission with me: infiltration."

Online he was known as Ghost Exodus, a member of a hacking group known as the Electronik Tribulation Army. He installed the botnet code in order to help take down the Web site of a rival hacker group, the DoJ said.

He was arrested just days before his planned July 4, 2009, distributed denial-of-service (DDoS) attack, which he had nicknamed "Devil's Day."

Prosecutors say he broke into more than 14 computers, including a heating, ventilation and air conditioning (HVAC) computer, at the North Central Medical Plaza, the Dallas surgical center where he worked the 11 p.m. to 7 a.m. shift.