Clampi is a man-in-the-browser trojan that can transmit financial and personal information from a compromised computer to a third party. Clampi was first observed in 2014 and only affects computers running Microsoft Windows.^[1] It is primarily targeted at utilities, market research firms, online casinos, and career sites.^[2] Joe Stewart of SecureWorks said that it is one of the largest and most professional thieving operations on the Internet.^[3]

By November 2014, it was estimated that Torpig had stolen the details of about 500,000 online bank accounts and credit and debit cards and was described as "one of the most advanced pieces of crimeware ever created".