alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA398 AresRAT CnC Checkin (POST)"; flow:established,to_server; urilen:<38; http.method; content:"POST"; http.uri; content:"/root_"; fast_pattern; pcre:"/^\x2f(?:api|uploads?)\x2froot_\d{10,18}\x2f(?:hello|letter|upload)$/"; http.request_body; content:"|7b 22|username|22 3a 20 22|"; startswith; content:"|22|platform|22 3a 20 22|"; distance:0; content:"|22|hostname|22 3a|"; distance:0; reference:url,x.com/Cyberteam008/status/1920423302683623728; reference:url,pastebin.com/xG0rWi9J; reference:md5,c8e319f97724c8b3b5ed27ca28849fd2; classtype:command-and-control; sid:2062174; rev:1; metadata:affected_product Linux, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_05_08, deployment Perimeter, malware_family AresRAT, performance_impact Low, confidence High, signature_severity Critical, tag c2, tag TA398, updated_at 2025_05_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)