alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Unknown Malware Download Request"; flow:established,to_server; content:"GET"; nocase; http_method; content:"/images/GR_OLD_CR.EXE"; nocase; http_uri; reference:url,www.prevx.com/filenames/X22210989379038527-X1/GR_OLD_CR.EXE.html; classtype:trojan-activity; sid:2011148; rev:5; metadata:created_at 2010_07_30, confidence Medium, signature_severity Major, updated_at 2019_07_26;)