Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT CottonCastle/Niteris EK Landing URI Struct June 19 2015 M3"; flow:established,to_server; content:"GET"; http_method; content:"/|3a|http|3a|/"; http_uri; fast_pattern; pcre:"/^\/[a-z]+\/[a-z]+\/\d\/[a-f0-9]{32}(?:[a-f0-9]{8})?\/\x3ahttp\x3a\x2f/U"; classtype:exploit-kit; sid:2021305; rev:3; metadata:created_at 2015_06_19, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)