alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Agent.XXZBEN Downloader Activity"; flow:established,to_server; http.header.raw; content:"Cookie|3a 20 0d 0a|Accept|3a 20|"; http.method; content:"GET"; http.uri; content:"/check?ver="; content:"&os="; distance:0; content:"&binary="; distance:0; content:"&token="; distance:0; content:"&host="; distance:0; content:"&run_time="; distance:0; content:"&once="; distance:0; http.user_agent; content:"User-Agent|3a 20|Mozilla"; fast_pattern; startswith; reference:md5,113a0256fa05ece2a56b88e6285aff7a; classtype:trojan-activity; sid:2030123; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_07, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_03;)