alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Blue Bot DDoS Proxy Request"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/proxy"; fast_pattern; endswith; http.connection; content:"Keep-Alive"; bsize:10; http.header_names; bsize:22; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; reference:md5,7d9411f7204782fdbcd0fd0f20956bbc; reference:url,web.archive.org/web/20150401000000*/research.zscaler.com/2015/05/rig-exploit-kit-infection-cycle-analysis.html; classtype:trojan-activity; sid:2021128; rev:7; metadata:attack_target Client_Endpoint, created_at 2015_05_21, deployment Perimeter, malware_family BlueBot, performance_impact Moderate, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_18, reviewed_at 2023_09_18; target:src_ip;)