alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Pripyat Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/endpoint.php"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; http.user_agent; bsize:15; content:"cpp-httplib/0.9"; http.request_body; content:"|22|computername|22 3a 22|"; content:"|22|username|22 3a 22|"; distance:0; content:"|22|hashrate|22 3a|"; distance:0; reference:md5,ffb7bbf6e3e3199555b979b46d3789a6; reference:url,twitter.com/3xp0rtblog/status/1501330153900703745; reference:md5,a12ba07fcdb4eb1c1ea65e8fa49ec4ad; classtype:trojan-activity; sid:2035420; rev:4; metadata:attack_target Client_Endpoint, created_at 2022_03_09, deployment Perimeter, malware_family Win32_Pripyat, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_20, reviewed_at 2023_08_25;)