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Elastic Docs ›Elastic Security Solution [8.8] ›Detections and alerts ›Prebuilt rule reference

Suspicious Interactive Shell Spawned From Inside A Container

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Suspicious Interactive Shell Spawned From Inside A Container

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This rule detects when an interactive shell is spawned inside a running container. This could indicate a potential container breakout attempt or an attacker’s attempt to gain unauthorized access to the underlying host.

Rule type: eql

Rule indices:

  • logs-cloud_defend*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-6m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

  • Data Source: Elastic Defend for Containers
  • Domain: Container
  • OS: Linux
  • Use Case: Threat Detection
  • Tactic: Execution

Version: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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process where container.id: "*" and
event.type== "start" and

/*D4C consolidates closely spawned event.actions, this excludes end actions to only capture ongoing processes*/
event.action in ("fork", "exec") and event.action != "end"
 and process.entry_leader.same_as_process== false and
(
(process.executable: "*/*sh" and process.args: ("-i", "-it")) or
process.args: "*/*sh"
)

Framework: MITRE ATT&CKTM

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