Sigma medium test sigma

Cloudflared Tunnels Related DNS Requests

Detects DNS requests to Cloudflared tunnels domains. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.

View Source

Detection Logic

{
  "selection": {
    "QueryName
| endswith": [
      ".v2.argotunnel.com",
      "protocol-v2.argotunnel.com",
      "trycloudflare.com",
      "update.argotunnel.com"
    ]
  },
  "condition": "selection"
}

False Positives

⚠ Legitimate use of cloudflare tunnels will also trigger this.

Field Validations

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