Dexter Malware

[What]
Dexter Malware compromises point-of sale terminals.
It steals data from payment cards' magnetic strips and sends the information to the criminals who use it to conduct fraudulent transactions by making card clones.

[When]
Dexter was first detected in December 2012.

[Where]
The variant found on devices in South Africa has affected most banks in the country.
The Dexter code was linked to a series of attacks on point-of-sale systems in the UK, US and dozens of other countries towards the end of 2012.
Paymant Association of South Africa (Pasa) believed that the criminals responsible were based in Europe.

[Impact]
Hundreds of thousands of customers have had their payment card data compromised.

[References]
Dexter payment card malware strikes South Africa http://www.bbc.co.uk/news/technology-24550505
“Dexter” malware infects South African restaurants, costs banks millions http://arstechnica.com/security/2013/10/dexter-malware-infects-south-african-restaurants-costs-banks-millions/
Wikipedia: Dexter (malware) http://en.wikipedia.org/wiki/Dexter_%28malware%29