ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3

Query · suricata

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";
Raw source ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
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;
)

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