According to CUNA News, the latest browser version of the Citadel banking Trojan malware launches fake pop-ups during online banking transactions. These fake pop-ups are designed to fool online users into re-entering their financial account logins and passwords.
In August, the Federal Bureau of Investigation (FBI) and the FBI's Internet Crime Complaint Center issued warnings to financial institutions about the disruptions created by the Trojan. The Citadel is described as ‘an advanced mutation of the infamous Zeus Trojan malware,’ and was only first identified in January in online conversations conducted in ‘underground’ hacker forums. In these forums, Citadel developers allege they have successfully infected computers that rely on Microsoft Security Essentials, McAfee and Norton for their anti-virus and malware protection.