New Spam campaign on Twitter Leads to Rogue AV
Early today, Kaspersky Lab discovered a new ongoing spam campaign on Twitter. hundreds of compromised accounts are currently spamming malicious links, hosted on .TK and .tw1.su domains, leading to Rogue Anti Virus softwares.

Here is an analysis of the infection at a given time. Keep in mind that it is just a snapshot of the infection, and that the numbers are actually lower than reality.
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Story added 18. April 2012, content source with full text you can find at link above.