huntrule

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

Related detections9 linkedT1567.002 — drag to rearrange
Suspicious ALPHA SPIDER Rclone Exfiltration Tool Masquerading as System Binary (via process_creation)
Malicious GhostLocker2 C2 Communication via HTTP POST (via proxy)
Suspicious Rclone Exfiltration Masquerading as wininit.exe
Malicious Bulk Data Exfiltration via Rclone (via process_creation)
Rclone SMB Share Exfiltration
Suspicious Data Exfiltration via Rclone to Cloud Storage (via process_creation)
Malicious Data Exfiltration via MEGAcmd
Suspicious Command and Control via Discord or Telegram Bot API
Data Exfiltration to WebDAV Share via curl Upload
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.