The massive Flashback botnet of Mac machines relied on hacked and malware-rigged WordPress blog sites to spread and infect users, according to Kaspersky Lab researchers.
We now know where the infection originated, and we have a number of removal tools available to get rid of the infection. But there is some disagreement on exactly how many Macs are still infected with Flashback, nearly two weeks later. Kaspersky researchers said a little over 30,000 Macs are still infected, as of Apr. 19. The biggest drop in the infections came after Apple released its final Java update to patch the flaw and remove the malware, according to Kaspersky Lab.
On the other hand, Symantec researchers claimed there were still 140,000 infected machines.
"The statistics from our sinkhole are showing declining numbers on a daily basis. However, we had originally believed that we would have seen a greater decline in infections at this point in time, but this has proven not to be the case," Symantec said.