Possible DNS Query To Ufile.io - DNS Client (via dns-client)
This rule detects DNS queries to "ufile.io", which was seen misused by malware and threat actors as a method for data exfiltration
SigmalowWindowsv1
sigma
possible-dns-query-to-ufile-io-dns-client-via-dns-client
title: Possible DNS Query To Ufile.io - DNS Client (via dns-client)
id: 46b0c875-d317-58b4-9983-fb0aad7968fb
status: stable
description: This rule detects DNS queries to "ufile.io", which was seen misused by malware and threat actors as a method for data exfiltration
references:
- https://attack.mitre.org/techniques/T1567/002/
- https://thedfirreport.com/2021/12/13/diavol-ransomware/
author: Huntrule Team
date: 2026-04-25
tags:
- attack.exfiltration
- attack.t1567.002
logsource:
product: windows
service: dns-client
definition: 'Requirements: Microsoft-Windows-DNS Client Events/Operational Event Log must be enabled/collected in order to receive the events.'
detection:
selection:
EventID: 3008
QueryName|contains: 'ufile.io'
condition: selection
falsepositives:
- Unknown
level: low
Known false positives
- Unknown
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.