alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Coreflood/AFcore Trojan Infection"; flow:established,to_server; http.start; content:"POST|20|/c/a"; fast_pattern; startswith; byte_test:1,<,64,0,relative; content:"HTTP/1.0|0d 0a|Host|3a20|"; reference:url,www.secureworks.com/research/threats/coreflood; classtype:trojan-activity; sid:2008434; rev:9; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2024_04_10;)