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Detection rules › Sigma

DNS Query To Ufile.io - DNS Client

Status
test
Severity
low
Log source
product windows, service dns-client
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects DNS queries to "ufile.io", which was seen abused by malware and threat actors as a method for data exfiltration

Known false positives

  • DNS queries for "ufile" are not malicious by nature necessarily. Investigate the source to determine the necessary actions to take

MITRE ATT&CK coverage

TacticTechniques
Exfiltration

Telemetry coverage

ProviderRecord / event type
DNS-ClientEvent ID 3008: DNS query is completed for the name QueryName, type QueryType, query options QueryOptions with status QueryStatus Results QueryResults.

Rule body

title: DNS Query To Ufile.io - DNS Client
id: 090ffaad-c01a-4879-850c-6d57da98452d
related:
    - id: 1cbbeaaf-3c8c-4e4c-9d72-49485b6a176b
      type: similar
status: test
description: Detects DNS queries to "ufile.io", which was seen abused by malware and threat actors as a method for data exfiltration
references:
    - https://thedfirreport.com/2021/12/13/diavol-ransomware/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-16
modified: 2023-09-18
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:
    - DNS queries for "ufile" are not malicious by nature necessarily. Investigate the source to determine the necessary actions to take
level: low

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    EventID: 3008
    QueryName|contains: 'ufile.io'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
QueryNamematch
  • ufile.io corpus 2 (sigma 2)
field:"QueryName" kind:match value:"ufile.io"