ET INFO Observed External IP Lookup Domain Domain (check-host .net)
Sourceet/open
CreatedApril 15, 2025
UpdatedApril 15, 2025
Classificationexternal-ip-check
alert dns $HOME_NET any -> any any (msg:"ET INFO Observed External IP Lookup Domain Domain (check-host .net)"; dns.query; dotprefix; content:".check-host.net"; nocase; endswith; reference:url,www.security.com/threat-intelligence/shuckworm-ukraine-gammasteel; classtype:external-ip-check; sid:2061598; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_04_15, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_15;)
Metadata
attack targetClient_Endpoint
created at2025_04_15
deploymentPerimeter
confidenceHigh
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2025_04_15
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