Process Backgrounded by Unusual Parent

Last updated 9 months ago on 2025-03-20

Created a year ago on 2025-01-29

About

This rule identifies processes that are backgrounded by an unusual parent process. This behavior may indicate a process attempting to evade detection by hiding its parent process.

Tags

Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: ExecutionTactic: PersistenceData Source: Elastic EndgameData Source: Elastic DefendData Source: CrowdstrikeData Source: SentinelOneLanguage: kuery

Severity

low

Risk Score

MITRE ATT&CK™

Execution (TA0002)(external, opens in a new tab or window)

↳ Command and Scripting Interpreter (T1059)(external, opens in a new tab or window)

Defense Evasion (TA0005)(external, opens in a new tab or window)

↳ Hide Artifacts (T1564)(external, opens in a new tab or window)

License

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

Definition

Rule Type

New Terms Rule

Integration Pack

Prebuilt Security Detection Rules

Index Patterns

logs-endpoint.events.process*endgame-*logs-crowdstrike.fdr*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:
✄𐘗event.category:process and host.os.type:linux and event.type:start and
event.action:(ProcessRollup2 or exec or exec_event or start) and
process.name:(bash or csh or dash or fish or ksh or sh or tcsh or zsh) and
process.args:(-c and *&)

Install detection rules in Elastic Security

Detect Process Backgrounded by Unusual Parent 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).