Malware developers are going open source in an effort to make their malicious software more useful to fraudsters.

By giving criminal coders free access to malware that steals financial and personal details, the malicious software developers are hoping to expand the capabilities of old Trojans.

According to Candid W?est, threat researcher with security firm Symantec, around 10 percent of the Trojan market is now open source.

The move to an open source business model is allowing criminals t...