alert tcp any any -> $HOME_NET any (msg:"ET HUNTING Google API AddItNow Open Redirect Link Inbound"; flow:established,to_client; content:"apis.google.com/additnow/l|3f|"; fast_pattern; pcre:"/^(?:^|.*?(?:(?:\x26|\x2526)(?:amp|\x23(?:38|x26))?))__lu\x3d/R"; reference:url,seclists.org/fulldisclosure/2025/Oct/11; classtype:misc-activity; sid:2065531; rev:1; metadata:created_at 2025_10_28, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_28; target:dest_ip;)