alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET SCAN Gootkit Scanner User-Agent Inbound"; flow:established,to_server; http.header; content:"Gootkit auto-rooter scanner"; classtype:web-application-attack; sid:2014022; rev:3; metadata:created_at 2011_12_13, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_20;)