alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Java JAR file download"; flow:from_server,established; content:"PK"; depth:500; content:"META-INF/"; within:100; content:"MANIFEST"; within:100; classtype:not-suspicious; sid:2011854; rev:3; metadata:created_at 2010_10_26, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)