alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Namsoth.A Checkin/NEWSREELS APT1 Related"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"name="; depth:5; content:"&userid="; distance:0; content:"&other"; distance:4; within:6; pcre:"/&userid=\d{4}&other=[MF]/"; reference:md5,a2cd1189860b9ba214421aab86ecbc8a; reference:url,www.mandiant.com/apt1; classtype:targeted-activity; sid:2016439; rev:4; metadata:created_at 2013_02_20, malware_family Win32_Namsoth_A, signature_severity Major, updated_at 2020_04_23;)