Crocker and others were paid between $200 to $300 for every 10,000 compromised computers, prosecutors alleged.
A computer became infected if a user clicked on a link in a Facebook message sent by one of their friends who had been previously infected. Their computer would be infected with Slenfbot or Dolbot, a malware program that would then download another harmful program called the Facebook Spreader.
That code would access the victim’s Facebook contacts and send out more messages with malicious links.
Facebook Spreader was featured on Darkode, a long-running secretive cybercriminal forum that was shut down by law enforcement last month.
More than 70 people in 20 countries were either searched, arrested or charged after the FBI gained access to the forum.
Crocker will be sentenced in the US District Court for the Western District of Pennsylvania on 23 November.
IDG News Service
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