ET INFO Microsoft Dev Tunnels Domain (tunnels .api .visualstudio .com) in DNS Lookup

SID: 2063119Rev: 13 views
Sourceet/open
CreatedJune 20, 2025
UpdatedJune 20, 2025
Classificationmisc-activity
alert dns $HOME_NET any -> any any (msg:"ET INFO Microsoft Dev Tunnels Domain (tunnels .api .visualstudio .com) in DNS Lookup"; dns.query; dotprefix; content:".tunnels.api.visualstudio.com"; nocase; endswith; reference:url,ipfyx.fr/post/visual-studio-code-tunnel/#web-traffic-monitoring; reference:url,github.com/SigmaHQ/sigma/blob/master/rules/windows/dns_query/dns_query_win_vscode_tunnel_communication.yml; classtype:misc-activity; sid:2063119; rev:1; metadata:affected_product Any, attack_target Client_and_Server, created_at 2025_06_20, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2025_06_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1665, mitre_technique_name Hide_Infrastructure;)

References

urlipfyx.fr/post/visual-studio-code-tunnel/#web-traffic-monitoring
urlgithub.com/SigmaHQ/sigma/blob/master/rules/windows/dns_query/dns_query_win_vscode_tunnel_communication.yml

Metadata

affected productAny
attack targetClient_and_Server
created at2025_06_20
deploymentPerimeter
performance impactLow
confidenceHigh
signature severityInformational
updated at2025_06_20
mitre tactic idTA0011
mitre tactic nameCommand_And_Control
mitre technique idT1665
mitre technique nameHide_Infrastructure

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