Pay-Per-Install: The New Malware Distribution Network
Malware authoring and distribution has become very profitable over the years. Earlier, malware was written mainly for fame and notoriety. However, it has now become a very profitable enterprise, backed by a strong business model. The process of propagating and distributing malware has been evolving constantly. A few years back, the main distribution technique was self-propagation. Worms would exploit server-side vulnerabilities that would allow propagation without any user interaction and simply required the computers to be on and connected to the network. Once the worm infected the computer using the vulnerability, it would scan for other vulnerable computers on the network, and the process would start all over again.