ET INFO External IP Lookup Domain (api .bigdatacloud .net) in DNS Lookup

SID: 2063077Rev: 13 views
Sourceet/open
CreatedJune 18, 2025
UpdatedJune 18, 2025
Classificationmisc-activity
alert dns $HOME_NET any -> any any (msg:"ET INFO External IP Lookup Domain (api .bigdatacloud .net) in DNS Lookup"; dns.query; bsize:20; content:"api.bigdatacloud.net"; nocase; reference:url,github.com/SigmaHQ/sigma/blob/master/rules/windows/dns_query/dns_query_win_susp_external_ip_lookup.yml; classtype:misc-activity; sid:2063077; rev:1; metadata:affected_product Any, attack_target Client_and_Server, created_at 2025_06_18, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2025_06_18;)

References

urlgithub.com/SigmaHQ/sigma/blob/master/rules/windows/dns_query/dns_query_win_susp_external_ip_lookup.yml

Metadata

affected productAny
attack targetClient_and_Server
created at2025_06_18
deploymentPerimeter
performance impactLow
confidenceHigh
signature severityInformational
updated at2025_06_18

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