Varonis Threat Labs discovered a logging evasion vulnerability in AWS where anonymous requests to external S3 buckets via VPC endpoints failed to generate CloudTrail Network Activity events. This flaw allowed attackers to invisibly exfiltrate data or download malware from compromised VPCs, though AWS has since patched the issue to ensure these requests are properly logged.
Logging Evasion
1 post
The Invisible Footprint: How Anonymous S3 Requests Evade AWS Logging