3 Flashback Trojan

Apple Macs, which was considered secure than all its counterparts has faced the biggest attack from Flashback Trojan, a virus, which according to the latest report had infected more than 650,000 Macs worldwide.

What It Does: The virus was designed to disguise itself as an Adobe Flash Player installer, using Flash player logos. It uses a Java vulnerability to install itself. After installing Flashback, the malware originally sought user names and passwords that are stored on Macs.

Affected Systems: Even though Apple released a security update in April, many users still are susceptible. The latest count of infected systems stands at above 650,000.