The hacking ring allegedly at the centre of the world’s largest identity theft last week was also involved in cracking a network of Citibank-branded ATMs in 7-Eleven stores which are operated by a third company, claimed US law enforcement sources. The hackers penetrated a network linking 2,200 kiosks inside 7-Eleven stores from late 2007 until at least February 2008. The network and the machines were owned by Texas-based CardTronics, which took monthly fees from Citi.
