Possible DNS Query To Ufile.io (via dns_query)

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
title: Possible DNS Query To Ufile.io (via dns_query)
id: 540d978a-6b05-5eae-a73b-d474d01241f1
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: 2026-06-10
tags:
    - attack.exfiltration
    - attack.t1567.002
logsource:
    product: windows
    category: dns_query
detection:
    selection:
        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.