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Detection rules › Sigma

Logging Configuration Changes on Linux Host

Status
test
Severity
high
Log source
product linux, service auditd
Author
Mikhail Larin, oscd.community
Source
github.com/SigmaHQ/sigma

Detect changes of syslog daemons configuration files

Known false positives

  • Legitimate administrative activity

MITRE ATT&CK coverage

TacticTechniques
Defense Impairment

Telemetry coverage

PlatformRecord / event type
Linuxauditd PATH record: Filename path information

Rule body

title: Logging Configuration Changes on Linux Host
id: c830f15d-6f6e-430f-8074-6f73d6807841
status: test
description: Detect changes of syslog daemons configuration files
references:
    - self experience
author: Mikhail Larin, oscd.community
date: 2019-10-25
modified: 2021-11-27
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: linux
    service: auditd
detection:
    selection:
        type: 'PATH'
        name:
            - /etc/syslog.conf
            - /etc/rsyslog.conf
            - /etc/syslog-ng/syslog-ng.conf
    condition: selection
falsepositives:
    - Legitimate administrative activity
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    type: 'PATH'
    name:
        - /etc/syslog.conf
        - /etc/rsyslog.conf
        - /etc/syslog-ng/syslog-ng.conf

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
nameeq
  • /etc/rsyslog.conf
  • /etc/syslog-ng/syslog-ng.conf
  • /etc/syslog.conf
field:"name" kind:eq
typeeq
  • PATH
field:"type" kind:eq value:"PATH"