Modification of ld.so.preload — Sigma Rule

Rule metadata and linked tags

Author: E.M. Anhaus (originally from Atomic Blue Detections, Tony Lambert), oscd.community. Source status: test; severity: high. Source dates: 2019-10-24 / 2021-11-27.

{
  "product": "linux",
  "service": "auditd"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 881abf47d1bb4c88d6a2c33d54ff08f01a98add850341faac3264c09b975172a

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Modification of ld.so.preload
id: 4b3cb710-5e83-4715-8c45-8b2b5b3e5751
status: test
description: Identifies modification of ld.so.preload for shared object injection. This technique is used by attackers to load arbitrary code into processes.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1574.006/T1574.006.md
    - https://eqllib.readthedocs.io/en/latest/analytics/fd9b987a-1101-4ed3-bda6-a70300eaf57e.html
author: E.M. Anhaus (originally from Atomic Blue Detections, Tony Lambert), oscd.community
date: 2019-10-24
modified: 2021-11-27
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1574.006
logsource:
    product: linux
    service: auditd
detection:
    selection:
        type: 'PATH'
        name: '/etc/ld.so.preload'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1574.006/T1574.006.md
• https://eqllib.readthedocs.io/en/latest/analytics/fd9b987a-1101-4ed3-bda6-a70300eaf57e.html