ET SCAN Observed Suspicious UA (Callstranger Vulnerability Checker)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Callstranger Vulnerability Checker"; bsize:34;
Raw source ET SCAN Observed Suspicious UA (Callstranger Vulnerability Checker) · 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 -> $HOME_NET any (
    msg:"ET SCAN Observed Suspicious UA (Callstranger Vulnerability Checker)";
    flow:established,to_server;
    http.user_agent;
    content:"Callstranger Vulnerability Checker"; bsize:34;
    reference:url,github.com/yunuscadirci/CallStranger;
    classtype:attempted-recon;
    sid:2030271; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2020_06_09, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2020_06_09;
)

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