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.

152 billion

scan probes sent every day

4-5 million

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


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