Shadowserver works with national governments, network providers, enterprises, financial and academic institutions, law enforcement agencies, and others, to reveal security vulnerabilities, expose malicious activity and help remediate victims.


Malicious domains sinkholed & blocked in a single botnet takedown operation, 2.5M over 4 years.

4 billion

IPv4 addresses scanned on 90+ ports each per day. 351 million hosts respond

4-5 million

IP addresses sinkholed per day, across 400 different malware family variants