Windows DNS Queries Containing ufile.io Domain

ATT&CK techniques

Exfiltration

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
- T1567.002Exfiltration to Cloud Storage
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

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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

v2
Candidate ingested via manual entry.2026-07-31
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.

windows-dns-queries-containing-ufile-io-1cbbeaaf

title: Windows DNS Queries Containing ufile.io Domain
id: a7cb8618-51c1-46cb-aa62-6bd5551e4b8f
related:
  - id: 090ffaad-c01a-4879-850c-6d57da98452d
    type: similar
  - id: 1cbbeaaf-3c8c-4e4c-9d72-49485b6a176b
    type: derived
status: test
description: 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).
references:
  - https://thedfirreport.com/2021/12/13/diavol-ransomware/
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/dns_query/dns_query_win_ufile_io_query.yml
author: yatinwad, TheDFIRReport, Huntrule Team
date: 2022-06-23
modified: 2023-09-18
tags:
  - attack.exfiltration
  - attack.t1567.002
logsource:
  product: windows
  category: dns_query
detection:
  selection:
    QueryName|contains: ufile.io
  condition: selection
falsepositives:
  - DNS queries for "ufile" are not malicious by nature necessarily. Investigate the source to determine the necessary actions to take
level: low
license: DRL-1.1

Convert

This rule as a query you can run. Uses no unlock credit.

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