itwbennett writes "An archive containing transaction records from Mt. Gox that was released on the Internet last week also contains bitcoin-stealing malware for Windows and Mac, say researchers at Kaspersky Lab who have analyzed the 620MB file called MtGox2014Leak.zip. The files masquerade as Windows and Mac versions of a custom, back-office application for accessing the transaction database of Mt. Gox. However, they are actually malware programs designed to search and steal Bitcoin wallet files from computers, Kaspersky security researcher Sergey Lozhkin said Friday in a blog post."