ET MALWARE ESPecter Bootkit Initialization Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/Heart.aspx?ti="; startswith; fast_pattern;
content:"&tn="; distance:0;
content:"&tg="; distance:0;
content:"&tv="; distance:0;
http.header_names;
content:!"Referer";
Raw source ET MALWARE ESPecter Bootkit Initialization Activity (GET) · 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 ESPecter Bootkit Initialization Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/Heart.aspx?ti="; startswith; fast_pattern;
    content:"&tn="; distance:0;
    content:"&tg="; distance:0;
    content:"&tv="; distance:0;
    http.header_names;
    content:!"Referer";
    reference:url,www.welivesecurity.com/2021/10/05/uefi-threats-moving-esp-introducing-especter-bootkit/;
    classtype:trojan-activity;
    sid:2034145; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_10_06, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_06;
)

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