It's clear from the provided log events that the threat actor has successfully pivoted and exploited Amazon Bedrock services after gaining unauthorized access to EC2 instance metadata (IMDS) in us-east-1. Here’s a detailed breakdown of the key points:
Event 1: Unauthorized IMDS Access (15:40:39 UTC)
The attacker accessed the EC2 instance's metadata service, which allowed them to retrieve sensitive credentials such as IAM role and access keys associated with the instance.
Key Insights:
- IMDSv1: The use of IMDSv1 is a critical vulnerability since it does not require MFA for accessing instance metadata.
- Instance ID: The attacker accessed the metadata from
i-0123456789abcdef0, allowing them to trace back the compromised resource.
Event 2: Console Sign-In with Stolen Credentials (17:15:00 UTC)
The threat actor used the harvested credentials to log in to the AWS Management Console, indicating a pivot from programmatic access to visual console interaction.
Key Insights:
- MFA Bypass: The lack of MFA enforcement is crucial since it allowed the attacker to authenticate without additional
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