"Spanish criminals who stole bank details from computers around the world did not realize the power of the illegal network they had created which could have paralyzed an entire country's computer systems, police said." Reuters
Mariposa (Spanish word for butterfly) botnet
"Police gave a news conference on Wednesday, a day after they arrested three people for what they believe to have been one of the biggest computer crimes ever detected.
They declined to identify the men, aged between 25 and 31, from small Spanish towns, whom they suspect of infecting more than 13 million computers with spyware.
Police believe the men were not expert hackers and bought their virus program on the black market before using it to take over other people's computers in order to create a "botnet," a network of enslaved computers.
"Fortunately this botnet of 13 million computers was controlled by someone who hadn't realized how powerful it was," Juan Salon, the head of the cybercrime unit of Spain's Civil Guard Police, told a news conference.
The criminals used the virus to infect machines -- initially exploiting a vulnerability in Microsoft Corp's Internet Explorer browser -- which then allowed them to record key strokes and login credentials. This botnet was known as "Mariposa" -- the Spanish word for butterfly.
The leader of the gang was caught with personal details of 800,000 people, said the Civil Guard. Government institutions and companies had also been affected, it said, although it declined to give more details." Reuters
(Writing by Jason Webb; editing by Robin Pomeroy)
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