ET SCAN HZZP Scan in Progress calc in Headers

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.header;
content:"C|3a|/WINDOWS/system32/calc.exe";
content:"|0d 0a|"; within:9;
pcre:"/^.+\x3a\s(test.)?C\:\/WINDOWS\/system32\/calc\.exe(.test)?\r$/m";
Raw source ET SCAN HZZP Scan in Progress calc in Headers · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> any any (
    msg:"ET SCAN HZZP Scan in Progress calc in Headers";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.header;
    content:"C|3a|/WINDOWS/system32/calc.exe";
    content:"|0d 0a|"; within:9;
    pcre:"/^.+\x3a\s(test.)?C\:\/WINDOWS\/system32\/calc\.exe(.test)?\r$/m";
    reference:url,www.krakowlabs.com/dev.html;
    classtype:attempted-recon;
    sid:2011028; rev:9;
    metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2020_09_14;
)

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