alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED ZuoRAT CBeacon CnC"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api"; http.user_agent; content:"WinHTTP"; fast_pattern; http.connection; content:"Keep-Alive"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:"|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Content-Length|0d 0a|Host|0d 0a 0d 0a|"; http.request_body; pcre:"/^[A-Za-z0-9=/+]{100}/"; reference:url,blog.lumen.com/zuorat-hijacks-soho-routers-to-silently-stalk-networks/; classtype:targeted-activity; sid:2037143; rev:4; metadata:attack_target Client_Endpoint, created_at 2022_06_28, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, malware_family ZuoRAT, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_17, reviewed_at 2025_04_17;)