Rule History

SID: 2009346 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 9 • Jul 30, 2010, 12:00 PM

Message:

ET ATTACK_RESPONSE Frequent HTTP 401 Unauthorized - Possible Brute Force Attack

Rule:

alert http $HTTP_SERVERS $HTTP_PORTS -> $EXTERNAL_NET any (msg:"ET ATTACK_RESPONSE Frequent HTTP 401 Unauthorized - Possible Brute Force Attack"; flow:from_server,established; content:"401"; http_stat_code; threshold:type both, track by_dst, count 30, seconds 60; classtype:attempted-recon; sid:2009346; rev:9; metadata:created_at 2010_07_30, confidence Medium, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)

Created:

Jul 30, 2010, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Oct 1, 2025, 9:34 PM

Filename:

rules/emerging-attack_response.rules