Rule History

SID: 2065523 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Oct 27, 2025, 12:00 PM

Message:

ET INFO Blockchain RPC Domain in DNS Lookup (mainnet .optimism .io)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET INFO Blockchain RPC Domain in DNS Lookup (mainnet .optimism .io)"; dns.query; bsize:19; content:"mainnet.optimism.io"; nocase; reference:url,docs.optimism.io/reference/networks; classtype:misc-activity; sid:2065523; rev:1; metadata:created_at 2025_10_27, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_27;)

Created:

Oct 27, 2025, 12:00 PM

Updated:

Oct 27, 2025, 12:00 PM

DB Created:

Oct 27, 2025, 10:34 PM

DB Updated:

Oct 28, 2025, 8:34 PM

Filename:

rules/emerging-info.rules