Malicious AWS EC2 Startup Shell Script Change (via cloudtrail)
This rule detects changes to the EC2 instance startup script. The shell script will be executed as root/SYSTEM every time the specific instances are booted up.
SigmahighCloudv1
Full detection rule
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Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.