alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED BotLoader CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/support"; fast_pattern; bsize:12; http.content_type; content:"application/json"; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; content:!"|0d 0a|Referer|0d 0a|"; http.request_body; content:"|7b 22|"; startswith; pcre:"/[0-9]{9}/R"; content:"|22 3a 22|"; reference:md5,4fd927530935327e0405ea5ddabc18ef; classtype:trojan-activity; sid:2045782; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_19, deployment Perimeter, former_category MALWARE, malware_family BotLoader, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_01, reviewed_at 2024_10_01; target:src_ip;)