Spanish police arrested 3 men suspected of being responsible for the world's largest network of virus-infected computers - the so-called Mariposa botnet. The botnet was made up of nearly 13 million computers across 190 countries. The botnet was rendered inactive in December, with the arrests following.
Out of 13 million computers infected, the chances would be pretty good that many of these computers would reside in a business environment. According to the report, the botnet included PCs inside more than half of the Fortune 1000 companies and more than 40 major banks.
The botnet was designed to steal sensitive information from social media sites and other online email services.
"This is very alarming because it proves how sophisticated and effective malware distribution software has become, empowering relatively unskilled cyber criminals to inflict major damage and financial loss," - Senior research advisor Pedro Bustamante
The 3 men arrested were all Spanish citizens without records and limited hacking skills. Other arrests may follow.