A cyber crime syndicate known as Magecart, which is made up of dozens of sub-groups that indulge in credit card theft by skimming online payment forms, has been found to be implicated in more than two million such attacks.

Sites that have been decommissioned due to attacks by the card-skimming attack group Magecart are being hijacked and re-used for other malicious activity once they come back online by a secondary group of cyber criminals, the security firm RiskIQ claims.

Attackers who breached networks at India's second largest outsourcing company, Wipro, were part of a sophisticated campaign that used both commercial and open-source marketing tools to hit many organisations with phishing attacks. Most of these were firms that deal in gift cards.