ET DOS Possible Memcached DDoS Amplification Response Outbound

Query · suricata

flowbits:isset,ET.memcached.ddos;
content:"STATS|20|pid"; depth:9; fast_pattern;
threshold:type both, count 100, seconds 60, 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 DOS Possible Memcached DDoS Amplification Response Outbound · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp any 11211 -> $EXTERNAL_NET any (
    msg:"ET DOS Possible Memcached DDoS Amplification Response Outbound";
    flowbits:isset,ET.memcached.ddos;
    content:"STATS|20|pid"; depth:9; fast_pattern;
    threshold:type both, count 100, seconds 60, track by_dst;
    reference:url,blog.cloudflare.com/memcrashed-major-amplification-attacks-from-port-11211/;
    classtype:attempted-dos;
    sid:2025402; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Server, created_at 2018_03_01, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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