alert tcp $HOME_NET 1024:65535 -> $EXTERNAL_NET 1024:65535 (msg:"ET P2P eMule KAD Network Send Username"; flow:established; content:"|e3|"; depth:1; content:"|00 00 00 01|"; distance:1; within:4; byte_test:1,<,51,37; threshold:type limit, count 5, seconds 600, track by_src; reference:url,emule-project.net; classtype:policy-violation; sid:2009973; rev:4; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2019_07_26;)