ATMs have long been targets for thieves; several years ago there was the Tyupkin malware, which could control their cash drawers. But a more popular form of attack is carried out via ATM and gas pump card skimmers, which are typically overlays attached to the outside of the ATMs and pumps. When you insert your card into the machine, these skimmers clone your card and capture your account number and PIN, which then is used later to clean out your account.
