alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP ZoomInfo Contact Contributor Install"; flow:established,to_server; http.request_line; content:"GET /client/installopen?client_id={"; startswith; fast_pattern; content:"} HTTP/"; distance:36; within:7; reference:md5,b2e902c566dda9a77d9dfe1adfc9de59; reference:url,smallbiztrends.com/2010/05/zoominfo-provides-free-sales-prospecting-tool-to-small-businesses-and-entrepreneurs.html; classtype:command-and-control; sid:2030515; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_14, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_07_14;)