Rule History

SID: 2027781 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 4 • Aug 1, 2019, 12:00 PM

Message:

ET PHISHING Possible Protonmail Phishing Domain in DNS Query

Rule:

alert dns $HOME_NET any -> any any (msg:"ET PHISHING Possible Protonmail Phishing Domain in DNS Query"; dns.query; content:"protonmail.support"; nocase; endswith; reference:url,threatconnect.com/blog/building-out-protonmail-spoofed-infrastructure/; classtype:social-engineering; sid:2027781; rev:4; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2019_08_01, deployment Perimeter, confidence Medium, signature_severity Minor, updated_at 2020_09_17;)

Created:

Aug 1, 2019, 12:00 PM

Updated:

Sep 17, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-phishing.rules