Docker Escape via Nsenter
editDocker Escape via Nsenter
editThis rule identifies a UID change event via nsenter. The nsenter command is used to enter a namespace, which is a way to isolate processes and resources. Attackers can use nsenter to escape from a container to the host, which can lead to privilege escalation and lateral movement.
Rule type: eql
Rule indices:
- logs-endpoint.events.process*
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
- Domain: Container
- OS: Linux
- Use Case: Threat Detection
- Tactic: Privilege Escalation
- Data Source: Elastic Defend
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editprocess where host.os.type == "linux" and event.type == "change" and event.action == "uid_change" and
process.entry_leader.entry_meta.type == "container" and process.args == "nsenter" and
process.args in ("-t", "--target") and process.args_count >= 4
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Escape to Host
- ID: T1611
- Reference URL: https://attack.mitre.org/techniques/T1611/