Rule History

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; content:"/xml/"; bsize:5; http.user_agent; content:"Mozilla/5.0 (Windows NT 6.3|3b 20|rv|3a|48.0) Gecko/20100101 Firefox/48.0"; bsize:65; http.host; content:"freegeoip.net"; bsize:13; fast_pattern; http.header_names; content:!"Referer"; reference:md5,aabf88d786c8a58cccae674621277a54; classtype:trojan-activity; sid:2033649; rev:1; 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 2021_08_03;)