Two Ukrainian men were arrested in Macau for reportedly planting the malicious software program in the seven Macau bank ATMs. They first connected the device to a laptop and then inserted it in the card slot on the ATMs. The device used by the criminals resembles a circuit strip wider as credit card but much longer than it. After inserting the device physically into the card card slot, the criminals successfully installed the malware that has ability to fetch customer’s credit card information, including PINs. Once the device is inserted in the cash slot, it caused the malicious program running on the ATM machines to crash.
Source: https://thehackernews.com/2014/05/fraudsters-physically-deploy-malicious.html