ET INFO Observed DNS Query to Cloudflare R2 Public Bucket (r2 .dev) Domain
Sourceet/open
CreatedMay 27, 2025
UpdatedJanuary 20, 2026
Classificationmisc-activity
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;)
References
Metadata
attack targetClient_Endpoint
created at2025_05_27
deploymentPerimeter
confidenceHigh
signature severityMajor
tagAI_Generated_Description
updated at2026_01_20
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