As cloud infrastructure becomes the backbone of modern enterprises, ensuring the security of these environments is paramount. With AWS (Amazon Web Services) still being the dominant cloud it is important for any security professional to know where to look for signs of compromise. AWS CloudTrail stands out as an essential tool for tracking and logging API activity, providing a comprehensive record of actions taken within an AWS account. Think of AWS CloudTrail like an audit or event log for all of the API calls made in your AWS account. For security professionals, monitoring these logs is critical, particularly when it comes to detecting potential unauthorized access, such as through stolen API keys. These techniques and many others I've learned through the incidents I've worked in AWS and that we built into SANS FOR509, Enterprise Cloud Forensics. 1. Unusual API Calls and Access Patterns A. Sudden Spike in API Requests One of the first signs of a potential security breach is an unexpected increase in API requests. CloudTrail logs every API call made within your AWS account, including who made the call, when it was made, and from where. An attacker with stolen API keys might initiate a large number of requests in a short time frame, either probing the account for information or attempting to exploit certain services. What to Look For: A sudden, uncharacteristic surge in API activity. API calls from unusual IP addresses, particularly from regions where legitimate users do…Read More