Modification of Dynamic Linker Preload Shared Object

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Modification of Dynamic Linker Preload Shared Object

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Identifies modification of the dynamic linker preload shared object (ld.so.preload). Adversaries may execute malicious payloads by hijacking the dynamic linker used to load libraries.

Rule type: new_terms

Rule indices:

  • auditbeat-*
  • logs-endpoint.events.*
  • endgame-*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Endpoint
  • OS: Linux
  • Use Case: Threat Detection
  • Tactic: Privilege Escalation
  • Data Source: Elastic Endgame
  • Data Source: Elastic Defend

Version: 207

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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host.os.type:linux and event.category:file and event.action:(updated or renamed or rename) and
not event.type:deletion and file.path:/etc/ld.so.preload

Framework: MITRE ATT&CKTM