alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Suspected Andariel RexPot CnC Checkin M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.content_type; content:"application/x-www-form-urlencoded"; http.user_agent; content:"Mozilla/88.0"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; http.request_body; content:"mpVI="; fast_pattern; startswith; reference:md5,842b0d0eb01716a9f526acd866d8bad3; reference:url,twitter.com/h2jazi/status/1681426768597778440; classtype:trojan-activity; sid:2046881; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_07_21, deployment Perimeter, former_category MALWARE, malware_family RexPot, performance_impact Low, confidence High, signature_severity Major, tag Andariel, updated_at 2025_04_17, reviewed_at 2025_04_17; target:src_ip;)