alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA421 Wineloader CnC Checkin M3"; flow:established,to_server; urilen:9; http.method; content:"GET"; http.uri; content:"/auth.php"; http.user_agent; bsize:116; content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|0|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chrome|2f|115|2e|0|2e|5790|2e|171|20|Safari|2f|537|2e|36"; fast_pattern; http.header_names; bsize:53; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Content-Length|0d 0a|Cache-Control|0d 0a 0d 0a|"; http.header; content:"|0d 0a|Cache-Control: no-cache|0d 0a|"; classtype:trojan-activity; sid:2051503; rev:3; metadata:attack_target Client_Endpoint, created_at 2024_03_06, deployment Perimeter, confidence Low, signature_severity Major, tag c2, updated_at 2024_04_03, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)