The logic bomb was embedded with legitimate code and set to launch at 9 a.m. on Jan. 31, but was impeded when another Fannie Mae engineer discovered the malware several days after it was planted.

A contractor has pleaded guilty to planting a "logic bomb" in a client's software in a bid to receive extra work from the company every few years. David Tinley, a 62-year-old contract programmer ...

The circumstance reportedly forced Tinley to share with employees his passwords that protected the system's code - revealing the logic bomb. Tinley's lawyers said that Tinley never made any money ...