Its creators unidentified began using these vehicles for criminal purposes, in recent weeks by load more malware on a small percentage of computers under their control, said Vincent Weafer, Symantec Vice President of security response, the research group of the world's largest security software maker, Symantec Corp.
"Expected to be long and slow change," he said without success. "This will not be fast, aggressive."
Conficker install another virus, known as Waledac who send spam e-mail without knowledge of PC owners, along with fake anti-spyware program, Weafer said.
A malicious software known as Conficker many fear they will slaughter of April 1 slowly activated a few weeks after being released as a false alarm, security experts said.
Conficker, also known as or Downadup Kido, returned to the silence of thousands of PCs and servers for email spam and spyware installation, they said.
In the negative dispersion began late last year, infecting millions of computers and turn them into "slaves" to respond to commands sent from a remote server, which effectively controls an army of computers known as a botnet.
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