alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MUROFET/Licat Trojan Checkin Forum"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/forum/?"; fast_pattern; pcre:"/forum\/\?[0-9a-f]{8}$/"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,531e84b0894a7496479d186712acd7d2; reference:url,extraexploit.blogspot.com/2010/10/some-domains-for-licatmurofettrojanzbot.html; classtype:command-and-control; sid:2012248; rev:7; metadata:created_at 2011_01_29, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_29;)