alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Unknown Dropped by RIG EK"; flow:established,to_server; http.uri; content:"/Prack"; fast_pattern; http.user_agent; bsize:11; content:"InetURL/1.0"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,18fa3ab45c6fa9da218dd4c35688c5f4; classtype:exploit-kit; sid:2020070; rev:5; metadata:created_at 2014_12_26, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_03;)