Potential Chroot Container Escape via Mount

Last updated 2 months ago on 2025-10-17

Created 2 years ago on 2024-01-15

About

Monitors for the execution of a file system mount followed by a chroot execution. Given enough permissions, a user within a container is capable of mounting the root file system of the host, and leveraging chroot to escape its containarized environment. This behavior pattern is very uncommon and should be investigated.

Tags

Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: Privilege EscalationDomain: ContainerData Source: Elastic DefendData Source: SentinelOneData Source: CrowdstrikeLanguage: eql

Severity

medium

Risk Score

MITRE ATT&CK™

Privilege Escalation (TA0004)(external, opens in a new tab or window)

↳ Escape to Host (T1611)(external, opens in a new tab or window)

License

Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type

Event Correlation Rule

Integration Pack

Prebuilt Security Detection Rules

Index Patterns

logs-endpoint.events.process*logs-sentinel_one_cloud_funnel.*logs-crowdstrike.fdr*

Related Integrations

endpoint(external, opens in a new tab or window)

sentinel_one_cloud_funnel(external, opens in a new tab or window)

crowdstrike(external, opens in a new tab or window)

Query

✄𐘗text code block:
✄𐘗sequence by host.id, process.parent.entity_id with maxspan=5m
  [process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "start", "ProcessRollup2") and
   process.name == "mount" and process.args : "/dev/sd*" and process.args_count >= 3 and
   process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")]
  [process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "start", "ProcessRollup2") and
   process.name == "chroot"]

Install detection rules in Elastic Security

Detect Potential Chroot Container Escape via Mount in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).