Virus writers who once favored releasing malware that would clog corporate networks by the thousands have shifted to a strategy of secrecy in which they commandeer PCs on the Internet in the pursuit of dollars instead of notoriety, a security expert said Friday.

Security firm Symantec Corp. has seen a dramatic decrease in network-damaging viruses over the last year and an increase in less destructive Trojans that quietly embed themselves into a PC.

By Antone Gonsalves at Systems Management Pipeline.

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