Conficker acts as any botnet is a collection of malicious software robots (abbreviated bots) Botnet can be used as a tool to completely paralyze other computers over the Internet through what is known as Distributed Denial of Service (DDoS) Botnets can also be used to engage in click abuses and frauds. The drones from a botnet can harvest e-mail addresses and/or send/forward a huge amount of messages to other computers. The following five simple rules should be enough to keep you safe from any upcoming disaster.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/conficker-one-year-after-part-three/