Logging was impaired via external encryption key

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: AWS Audit Log OR Gcp Audit Log
Detection Modules	Cloud
Detector Tags	Cloud Log Tampering Analytics
ATT&CK Tactic	Impact (TA0040), Defense Impairment (TA0112)
ATT&CK Technique	Data Manipulation (T1565), Disable or Modify Tools (T1685)
Severity	Medium

Description

• The resource was configured with an external key
• This might be an attempt to disrupt log inspection.

Attacker's Goals

Modifying the key used to encrypt the logs to remain undetected.

Investigative actions

• Check the identity that updated the resource configuration.
• Check the key used to encrypt the logs.