ET INFO Abused Confluence/Jira External Sharing Site (external-share .com in TLS SNI)

Query · suricata

flow:established,to_server;
tls.sni;
content:".external-share.com"; endswith; fast_pattern;
threshold:type limit, count 1, seconds 600, track by_src;
Raw source ET INFO Abused Confluence/Jira External Sharing Site (external-share .com in TLS SNI) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET INFO Abused Confluence/Jira External Sharing Site (external-share .com in TLS SNI)";
    flow:established,to_server;
    tls.sni;
    content:".external-share.com"; endswith; fast_pattern;
    threshold:type limit, count 1, seconds 600, track by_src;
    reference:url,urlscan.io/result/b3b6638b-76ed-48d5-b66f-a78d25d2a8c1/;
    classtype:misc-activity;
    sid:2047721; rev:1;
    metadata:created_at 2023_08_24, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_08_24, reviewed_at 2023_08_24;
)

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