Malware
Bunitu
Bunitu is a trojan that exposes infected computers to be used as a proxy for remote clients.
Bunitu is a Windows malware family.
Background
Bunitu is a trojan that turns infected machines into proxies available to remote clients. At startup it announces itself by reporting its address and the ports it has open. The resulting Bunitu proxies are reachable through criminal VPN offerings such as VIP72.
Source: Malpedia (Fraunhofer FKIE).