alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Adware.iBryte.B Install"; flow:to_server,established; content:"GET"; http_method; content:"/impression.do"; http_uri; fast_pattern:only; content:"event="; http_uri; content:"_id="; http_uri; content:!"Referer|3a|"; http_header; reference:md5,1497c33eede2a81627c097aad762817f; classtype:trojan-activity; sid:2018194; rev:9; metadata:created_at 2012_02_13, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)