Manual Mount Discovery via /etc/exports or /etc/fstab

Last updated 6 months ago on 2025-07-07

Created 8 months ago on 2025-04-25

About

This rule detects manual mount discovery via the /etc/exports or /etc/fstab file on Linux systems. These files are used by NFS (Network File System) to define which directories are shared with remote hosts. Attackers may access this file to gather information about shared directories and potential targets for further exploitation.

Tags

Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: DiscoveryData Source: Elastic DefendData Source: Elastic EndgameData Source: CrowdstrikeData Source: SentinelOneLanguage: eql

Severity

low

Risk Score

MITRE ATT&CK™

Discovery (TA0007)(external, opens in a new tab or window)

↳ System Information Discovery (T1082)(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

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

Related Integrations

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

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

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

Query

✄𐘗text code block:
✄𐘗process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2") and
process.name in ("cat", "grep", "tail", "less", "more", "egrep", "fgrep") and process.command_line like ("/etc/exports", "/etc/fstab")

Install detection rules in Elastic Security

Detect Manual Mount Discovery via /etc/exports or /etc/fstab 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).