alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Graftor EXE Download Common Header Order"; flow:established,to_server; http.uri; content:".exe"; endswith; http.user_agent; content:"MSIE"; http.connection; content:"close"; nocase; http.header_names; bsize:76; content:"|0d 0a|Host|0d 0a|Accept-Language|0d 0a|Accept|0d 0a|Accept-Encoding|0d 0a|Connection|0d 0a|User-Agent|0d 0a 0d 0a|"; fast_pattern; reference:md5,5d9d5b9089ad464e51ff391b14da1953; classtype:trojan-activity; sid:2018254; rev:7; metadata:created_at 2014_03_12, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_07, reviewed_at 2024_02_16;)