ET INFO vk .com API Usage Observed

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"|2f|method|2f|messages|2e|send|3f|"; startswith;
http.host;
content:"api.vk.com"; bsize:10; fast_pattern;
threshold:type limit, count 1, seconds 300, track by_src;
Raw source ET INFO vk .com API Usage Observed · 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 INFO vk .com API Usage Observed";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"|2f|method|2f|messages|2e|send|3f|"; startswith;
    http.host;
    content:"api.vk.com"; bsize:10; fast_pattern;
    threshold:type limit, count 1, seconds 300, track by_src;
    classtype:misc-activity;
    sid:2050882; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2024_02_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_01_20;
)

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