alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/BeamWinHTTP CnC Activity M2 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/tracemap.php"; endswith; fast_pattern; http.header_names; content:!"Referer"; reference:md5,854d5dfe2d5193aa4150765c123df8ad; reference:url,asec.ahnlab.com/en/43255; classtype:command-and-control; sid:2045779; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_12_22, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_BeamWinHTTP, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_19, reviewed_at 2025_10_24, former_sid 2852977;)