alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE X-Files Stealer CnC Exfil Activity M2"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?Chatid="; http.content_type; bsize:68; content:"multipart/form-data|3b 20|boundary=|22|"; startswith; content:"|2d|"; distance:8; within:1; content:"|2d|4"; distance:4; within:2; content:"|2d|"; distance:3; within:1; content:"|2d|"; distance:4; within:1; content:"|22|"; distance:12; within:1; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; http.request_body; content:"|0d 0a|Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d|file|3b 20|filename|3d|q|3b 20|filename|2a 3d|utf|2d|8|27 27|q|0d 0a 0d 0a|PK|03 04|"; fast_pattern; reference:md5,c128193024853118bd07d4a4e89200bf; classtype:command-and-control; sid:2037743; rev:3; metadata:created_at 2022_07_12, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)