alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Possible XDocCrypt/Dorifel Checkin"; flow:established,to_server; content:"GET"; http_method; content:"&pin="; http_uri; content:"&crc="; http_uri; content:"&uniq="; http_uri; reference:url,www.fox-it.com/en/blog/xdoccryptdorifel-document-encrypting-and-network-spreading-virus; classtype:trojan-activity; sid:2015631; rev:6; metadata:created_at 2012_08_16, signature_severity Unknown, updated_at 2019_07_26;)