Rule History

SID: 2017500 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 3 • Sep 20, 2013, 12:00 PM

Message:

ET ATTACK_RESPONSE Probably Evil Long Unicode string only string and unescape 2

Rule:

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ATTACK_RESPONSE Probably Evil Long Unicode string only string and unescape 2"; flow:established,from_server; file_data; content:"unescape"; content:"|27|%u"; nocase; content:!"|27|"; within:120; pcre:"/^[a-f0-9]{4}([\%\\]u[a-f0-9]{4}){20}/Ri"; classtype:bad-unknown; sid:2017500; rev:3; metadata:created_at 2013_09_20, deployment alert_only, signature_severity Minor, updated_at 2023_04_19;)

Created:

Sep 20, 2013, 12:00 PM

Updated:

Apr 19, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-attack_response.rules