alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:5; content:"/xml/"; http.user_agent; bsize:65; content:"Mozilla/5.0 (Windows NT 6.3|3b 20|rv|3a|48.0) Gecko/20100101 Firefox/48.0"; http.host; bsize:13; content:"freegeoip.net"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,aabf88d786c8a58cccae674621277a54; classtype:trojan-activity; sid:2033649; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_03, deployment Perimeter, malware_family Quasar, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)