ET POLICY Possible SSLv2 Negotiation in Progress Client Master Key SSL2_RC4_128_WITH_MD5

Query · suricata

flow:to_server,established;
flowbits:isset,SSlv2.ServerHello;
content:"|02 01 00 80|"; offset:2; depth:4;
threshold:type limit, count 1, seconds 600, track by_dst;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET POLICY Possible SSLv2 Negotiation in Progress Client Master Key SSL2_RC4_128_WITH_MD5 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET POLICY Possible SSLv2 Negotiation in Progress Client Master Key SSL2_RC4_128_WITH_MD5";
    flow:to_server,established;
    flowbits:isset,SSlv2.ServerHello;
    content:"|02 01 00 80|"; offset:2; depth:4;
    threshold:type limit, count 1, seconds 600, track by_dst;
    reference:url,drownattack.com/drown-attack-paper.pdf;
    classtype:policy-violation;
    sid:2022584; rev:1;
    metadata:created_at 2016_03_02, confidence Medium, signature_severity Informational, updated_at 2019_07_26;
)

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