Rule History

SID: 2062570 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 2 • May 27, 2025, 12:00 PM

Message:

ET INFO Observed DNS Query to Cloudflare R2 Public Bucket (r2 .dev) Domain

Rule:

alert dns $HOME_NET any -> any any (msg:"ET INFO Observed DNS Query to Cloudflare R2 Public Bucket (r2 .dev) Domain"; dns.query; dotprefix; content:".r2.dev"; nocase; endswith; pcre:"/pub\x2d[a-f0-9]{32}\x2er2\x2edev/"; reference:url,developers.cloudflare.com/r2/buckets/public-buckets/; classtype:misc-activity; sid:2062570; rev:2; metadata:attack_target Client_Endpoint, created_at 2025_05_27, deployment Perimeter, confidence High, signature_severity Major, tag AI_Generated_Description, updated_at 2026_01_20; target:src_ip;)

Created:

May 27, 2025, 12:00 PM

Updated:

Jan 20, 2026, 12:00 PM

DB Created:

May 27, 2025, 11:10 PM

DB Updated:

Jan 20, 2026, 9:34 PM

Filename:

rules/emerging-info.rules