Researchers have uncovered a botnet that uses compromised Web servers instead
of the usual personal computers to launch denial-of-service (DoS) attacks.
Security firm Imperva said on Wednesday it uncovered a botnet of about 300
Web servers after one of its "honeypot" servers was used in an attack and based
on a search of attack code via Google. Web servers were commonly used in such
attacks a decade ago but had been replaced by the more ubiquitous Windows-based
PCs, said Amachai Shulman, chief technology officer at Imperva.