The U.S. Secret Service is warning about a recent uptick in ATM skimming attacks. Thieves use a combination of magnets and medical devices to siphon data directly from the card reader. This type of attack, sometimes called ATM wiretapping or eavesdropping, starts when thieves use a drill to make a relatively large hole in the front of a cash machine. The hole is then concealed by a metal faceplate, or perhaps a decal with instructions on how to use the ATM.”]
Source: https://krebsonsecurity.com/2018/09/secret-service-warns-of-surge-in-atm-wiretapping-attacks/