alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Yoyo-DDoS Bot HTTP Flood Attack Outbound"; flow:established,to_server; http.accept_enc; bsize:13; content:"g|7b|ip|2c 20|deflate"; http.connection; bsize:10; content:"Keep|2d|Alivf"; fast_pattern; threshold:type limit, count 5, seconds 60, track by_src; reference:url,asert.arbornetworks.com/2010/08/yoyoddos-a-new-family-of-ddos-bots/; classtype:denial-of-service; sid:2011403; rev:4; metadata:created_at 2010_09_28, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_20;)