alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Zebrocy Downloader Traffic"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/buildings.php"; endswith; fast_pattern; http.content_len; bsize:2; content:"11"; http.host; pcre:"/(?:\d{1,3}\.){3}\d{1,3}/"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|user-agent|0d 0a|"; reference:md5,a31e3b8d2f5e0369be8f3dbb7e23120b; reference:url,twitter.com/Vishnyak0v/status/1269651391980736513; classtype:trojan-activity; sid:2030728; rev:4; metadata:attack_target Client_Endpoint, created_at 2020_08_24, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)