alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MagikPOS Downloader Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; http.request_body; content:"data=domain%253a"; startswith; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|accept"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,121c1008d54e91db66feaf67b3d4084e; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/majikpos-combines-pos-malware-and-rats/; classtype:command-and-control; sid:2024066; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2017_03_16, deployment Perimeter, malware_family MagikPOS, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_05_01;)