alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Camaro Dragon APT - Horse Shell CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/index.php"; http.user_agent; content:"Mozilla/4.0|20 28|compatible|3b 20|MSIE 8.0|3b 20|Windows NT 6.1|3b 20|Trident/4.0|3b 20|qdesk 2.4.1265.203|3b 20|SLCC2|3b 20 2e|NET CLR 2.0.50727|3b 20 2e|NET CLR 3.5.30729|3b 20 2e|NET CLR 3.0.30729|3b 20|InfoPath.3|29|"; fast_pattern; http.header_names; content:"|0d 0a|Accept|0d 0a|Accept-Language|0d 0a|User-Agent|0d 0a|Accept-Encoding|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; reference:url,research.checkpoint.com/2023/the-dragon-who-sold-his-camaro-analyzing-custom-router-implant/; classtype:trojan-activity; sid:2045753; rev:2; metadata:affected_product Router, attack_target IoT, created_at 2023_05_17, deployment Perimeter, former_category MALWARE, malware_family Horse_Shell, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_01, reviewed_at 2024_10_01; target:src_ip;)