alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Evil Macro Downloading Trojan Dec 16 2015 Post to EXE"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".exe"; nocase; fast_pattern; pcre:"/^[\x2fa-z\d]+\.exe$/"; http.header; header_lowercase; content:"content-length|3a 20|0|0d 0a|connection|3a 20|"; content:"accept|3a 20 2a 2f 2a 0d 0a|"; depth:13; content:"accept-encoding|3a 20|gzip|2c 20|deflate|0d 0a|user-agent|3a 20|Mozilla|2f|4|2e|0|20 28|compatible|3b 20|MSIE|20|7|2e|0|3b|"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:trojan-activity; sid:2022270; rev:5; metadata:created_at 2015_12_17, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_21;)