A Panda Security employee discovered three malware programs on a recently purchased HTC Magic phone when it was plugged it into a Windows computer.

Upon further investigation, Panda found that the employee's phone contained three malware programs: a client for the now-defunct Mariposa botnet, the Conficker worm as well as a password stealer for the Lineage game, said Pedro Bustamante, Panda's senior research adviser.

The malware programs were on the phone's 8GB microSD memory card, which mounts as an external drive when plugged into a PC, Bustamante said. When plugged into a Windows PC, the Mariposa botnet client would automatically run, Bustamante said.