Rule History

SID: 2013032 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 4 • Jun 14, 2011, 12:00 PM

Message:

ET USER_AGENTS EmailSiphon Suspicious User-Agent Inbound

Rule:

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET USER_AGENTS EmailSiphon Suspicious User-Agent Inbound"; flow:established,to_server; http.user_agent; content:"EmailSiphon"; nocase; depth:11; reference:url,www.useragentstring.com/pages/useragentstring.php; classtype:attempted-recon; sid:2013032; rev:4; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2011_06_14, deployment Perimeter, confidence High, signature_severity Major, tag User_Agent, updated_at 2020_10_13;)

Created:

Jun 14, 2011, 12:00 PM

Updated:

Oct 13, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-user_agents.rules