CIRCL HoneyBot services consist of the distributed operation and exploitation of CIRCL HoneyBots. These services are part of a research project with the aim to improve security on Internet. A CIRCL HoneyBot is a low-interaction honeypot running on an embedded device, that is deployed in the premises of CIRCL partners. The HoneyBot listens to unused IP addresses specified by the partner. The HoneyBot sensor located in an unused network space of the partner (from one IP address to multiple IP addresses). The unused network space has no production network traffic and the traffic reaching such network space can be called background noise. This background noise contains malicious opportunistic attacks along with other traffic like backscatter traffic due to DDoS or misconfigurations. The CIRCL HoneyBot project is now part of the D4 project.