AWS Execution via System Manageredit

Identifies the execution of commands and scripts via System Manager. Execution methods such as RunShellScript, RunPowerShellScript, and alike can be abused by an authenticated attacker to install a backdoor or to interact with a compromised instance via reverse-shell using system only commands.

Rule type: query

Rule indices:

  • filebeat-*

Severity: low

Risk score: 21

Runs every: 10 minutes

Searches indices from: now-60m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • AWS
  • Elastic
  • SecOps
  • Logging
  • Continuous Monitoring

Version: 1

Added (Elastic Stack release): 7.9.0

Rule authors: Elastic

Rule license: Elastic License

Potential false positivesedit

Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Suspicious commands from unfamiliar users or hosts should be investigated. If a known behavior is causing false positives, it can be excluded from the rule.

Investigation guideedit

The AWS Filebeat module must be enabled to use this rule.

Rule queryedit

event.module:aws and event.dataset:aws.cloudtrail and
event.provider:ssm.amazonaws.com and event.action:SendCommand and
event.outcome:success

Threat mappingedit

Framework: MITRE ATT&CKTM