A new malware attack aimed at stealing BitCoin wallets is on the loose, according to information released by security firm Symantec. The attack has led to reports of at least one theft amounting to approximately $500,000. BitCoins are a form of virtual currency. The relatively unregulated method of trading that appeals to so many users comes with a downside -- unencrypted codes can lead to large security breaches, such as in the case of the malware exposed by Symantec. Days after the attack was publicized, the value of BitCoins has fallen significantly.