Two weeks ago we recorded a surge in Koobface, the highly prolific worm infecting social networking sites. It targets sites such as Facebook and Twitter and uses compromised legitimate websites as proxies for its main command and control server. The number of C&C servers dropped steadily from 107 on February 25, to as low as 71 on March 8. In just 48 hours, the number doubled to 142 in just two days. Now the number is just below 70, the lowest it has been in over a month.”]
Source: https://securelist.com/koobface-cc-servers-steadily-dropping-new-spike-coming-soon/29562/