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.

848,000

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

145 million

sinkhole connections per day

70 billion

SSL certificates, indexed
 & searchable in our data & analysis clusters