Rule History

alert tcp $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET MALWARE Possible Variant.Kazy.53640 Malformed Client Hello SSL 3.0 (Session_Id length greater than Client_Hello Length)"; flow:to_server,established; content:"|16 03 00|"; depth:3; content:"|01|"; distance:2; within:1; byte_extract:3,0,SSL.Client_Hello.length,relative; byte_test:1,>,SSL.Client_Hello.length,34,relative; threshold: type both, track by_src, count 5, seconds 60; reference:md5,a01d75158cf4618677f494f9626b1c4c; classtype:trojan-activity; sid:2014634; rev:2; metadata:created_at 2012_04_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_13;)