There was early speculation this morning that the Twitter outage was yet another case of growing pains with the Twitter infrastructure simply not being able to keep up with the load associated with their rapid growth. However, today’s outage is happening at the same time a new version of the Koobface malware was found in the wild. This malware is using both Twitter and Facebook messages to send invitations that are designed to lure potential victims to fake anti-virus web pages. The speculation is that the onslaught of bogus messages that are directing users to malicious pages may in fact be overwhelming Twitter.
When a recipient of a fake Twitter message clicks on the embedded link, they arrive at a fake Facebook page that contains a video. When the user selects to view the video, they are told that in order to view the video, they have to install a new Adobe Flash Player. If they select to install the new software, they are actually downloading and installing malware. Clicking on links on Twitter has been the largest security hole. This comes back to basic email, Twitter and blogging security practices - do not click on links that come from untrusted sources.
Twitter Under Possible New Koobface Malware Attack it s a sure no in my opinion .
I still think the DDoS is more likely to have been the method of attack and the only connection with koobface is that it may have help in optening zombies for the DDoS attack that s all.
In any case twitter has to make more changes the collaboration with Google and F-secure is not sufficient personally I recommend to have a discussion with the guy of my AV bitdefender 2009 maybe they can help also and to make a campaign that informs there user how to stay safe and not become zombies(bots) that helped this time to take out twitter in the attack.