As per a blog post by the company, Most of the infected machines are located in United States and Canada. Although Apple has already patched the vulnerability, there may be thousands of computers out there, who may not have applied the security patch.
Dubbed as a BackDoor.Flashback.39 Trojan, it is infecting the computers after a user visits a website containing the Trojan and the infection happens silently in the background. The security vulnerability that is allowing the Trojan to infect user’s computer exists in Java, a popular programming language for making webpages. Security researchers at Docter Web have already identified a large number sites housing the exploit.
“This once again refutes claims by some experts that there are no cyber-threats to Mac OS X,” stated Docter Web in the blog post. It is recommended that Mac OS X users download and install a security update released by Apple from support.apple.com/kb/HT5228 to prevent infection of their systems by BackDoor.Flashback.39.
Boris Sharov, Doctor Web’s chief executive officer, said in an interview that the spread of the infection appears to have leveled off at around 600,000 computers, a sign of the effectiveness of the security patch. “It just shows that no matter what operating system you’re using, you can be at risk,” he said. “No one is immune.”