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Windows DNS Queries Containing ufile.io Domain

Alerts on Windows DNS lookups where the queried name contains ufile.io, indicating potential exfiltration-related activity.

FreeReviewedSigma · Low · v2
Product
windows
Category
dns_query
Author
yatinwad, TheDFIRReport (SigmaHQ), DRL 1.1
Published
2022-06-23
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Exfiltration

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule flags DNS queries whose QueryName contains "ufile.io". Attackers may use lookups to external domains to support data exfiltration or related command-and-control activity. Detection relies on Windows DNS query telemetry that includes the queried name (QueryName).

Reporting behind it

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Windows DNS Queries Containing ufile.io Domain
Pivot detection · T1567.002 · 9 related

Changelog

v2
  1. v2
    Candidate ingested via manual entry.2026-07-31
  2. v1
    No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.