ET INFO Observed Cloudflare Tunneling Domain (argotunnel .com in TLS SNI)

SID: 2047123Rev: 20 views
History
Sourceet/open
CreatedAugust 9, 2023
UpdatedSeptember 1, 2023
Classificationmisc-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed Cloudflare Tunneling Domain (argotunnel .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".argotunnel.com"; endswith; fast_pattern; reference:url,www.guidepointsecurity.com/blog/tunnel-vision-cloudflared-abused-in-the-wild/; classtype:misc-activity; sid:2047123; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_08_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_01;)

References

urlwww.guidepointsecurity.com/blog/tunnel-vision-cloudflared-abused-in-the-wild/

Metadata

attack targetClient_Endpoint
created at2023_08_09
deploymentPerimeter
performance impactLow
confidenceHigh
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2023_09_01

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