alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cookies/Cookiebag Checkin"; flow:to_server,established; http.uri; content:"/indexs.zip"; fast_pattern; reference:md5,840BD11343D140916F45223BA05ABACB; classtype:command-and-control; sid:2016808; rev:4; metadata:created_at 2013_05_02, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;)