alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Retadup CnC Checkin M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2f|1|2f|0|2f|0"; endswith; pcre:"/^\/[A-F0-9]{30,60}\/1\/0\/0$/"; http.user_agent; content:"AutoIt"; depth:6; endswith; fast_pattern; http.header_names; content:!"Referer"; content:!"Accept"; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/monero-mining-retadup-worm-goes-polymorphic-gets-an-autohotkey-variant/; classtype:command-and-control; sid:2027077; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_03_13, deployment Perimeter, malware_family Retadup, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_16;)