alert http $HOME_NET any -> $EXTERNAL_NET 26800 (msg:"ET MALWARE ABCbot CnC Exfil"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:11; content:"/api/postip"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; http.connection; content:"close"; http.content_type; content:"application/x-www-form-url encoded"; http.request_body; content:"OS|3a 20|"; startswith; content:"CPU:"; distance:0; content:"os-name:"; fast_pattern; distance:0; content:"lanip:"; distance:0; reference:url,blog.netlab.360.com/abcbot_an_evolving_botnet_en; classtype:trojan-activity; sid:2034483; rev:5; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2021_11_17, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)