Malware
MedusaHTTP
Medusa is a DDoS bot written in .NET 2.0.
MedusaHTTP is a Windows malware family.
Background
Medusa is a DDoS bot built on .NET 2.0. Its present version communicates with its C&C over HTTP, whereas the earlier variant relied on IRC.
Source: Malpedia (Fraunhofer FKIE).