alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET MALWARE Possible Linux/Cdorked.A Incoming Command"; flow:established,to_server; http.uri; pcre:"/\?[0-9a-f]{6}$/"; http.cookie; content:"SECID="; reference:url,www.welivesecurity.com/wp-content/uploads/2014/03/operation_windigo.pdf; reference:url,github.com/eset/malware-ioc; classtype:attempted-user; sid:2016794; rev:9; metadata:created_at 2013_04_27, deprecation_reason Age, confidence Medium, signature_severity Major, updated_at 2024_01_29, reviewed_at 2024_01_29;)