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Detection rules › Sigma

Linux Doas Conf File Creation

Status
stable
Severity
medium
Log source
category file_event, product linux
Author
Sittikorn S, Teoderick Contreras
Source
github.com/SigmaHQ/sigma

Detects the creation of doas.conf file in linux host platform.

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
Privilege Escalation

Telemetry coverage

PlatformRecord / event type
LinuxEvent ID 11: File created

Rule body

title: Linux Doas Conf File Creation
id: 00eee2a5-fdb0-4746-a21d-e43fbdea5681
status: stable
description: Detects the creation of doas.conf file in linux host platform.
references:
    - https://research.splunk.com/endpoint/linux_doas_conf_file_creation/
    - https://www.makeuseof.com/how-to-install-and-use-doas/
author: Sittikorn S, Teoderick Contreras
date: 2022-01-20
modified: 2022-12-31
tags:
    - attack.privilege-escalation
    - attack.t1548
logsource:
    product: linux
    category: file_event
detection:
    selection:
        TargetFilename|endswith: '/etc/doas.conf'
    condition: selection
falsepositives:
    - Unlikely
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    TargetFilename|endswith: '/etc/doas.conf'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
TargetFilenameends_with
  • /etc/doas.conf
field:"TargetFilename" kind:ends_with value:"/etc/doas.conf"