alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT28 Zebrocy/Zekapab POST Template Structure"; flow:established,to_server; threshold:type limit, count 1, seconds 30, track by_src; http.method; content:"POST"; http.uri; content:".php"; http.user_agent; content:"Mozilla|20|v5.1|20 28|Windows"; depth:21; http.request_body; content:"%0D%0AHost%20Name|3a|"; fast_pattern; content:"%0D%0AOS%20Name|3a|"; content:"%0D%0AOS%20Configuration|3a|"; reference:md5,961e79a33f432ea96d2c8bf9eb010006; classtype:targeted-activity; sid:2044217; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_03_28, deployment Perimeter, malware_family Zekapab, performance_impact Low, confidence High, signature_severity Major, tag Zebrocy, updated_at 2023_02_16, former_sid 2835618;)