Individual skill
detecting-s3-data-exfiltration-attempts
Detecting data exfiltration attempts from AWS S3 buckets by analyzing CloudTrail S3 data events, VPC Flow Logs, GuardDuty findings, Amazon Macie alerts, and S3 access patterns to identify unauthorized bulk downloads and cross-account data transfers.
skills/detecting-s3-data-exfiltration-attempts/SKILL.md
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- Last checked
- Nov 9, 2026
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- Repository last updated
- Aug 31, 2026
- License
- Apache-2.0
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- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- cloud-security Declared skill tag
- aws Declared skill tag
- s3 Declared skill tag
- data-exfiltration Declared skill tag
- guardduty Declared skill tag
- macie Declared skill tag
- threat-detection Declared skill tag
- security Derived category
- data Derived category
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# Detecting S3 Data Exfiltration Attempts
## When to Use
- When GuardDuty detects anomalous S3 access patterns such as bulk downloads from unusual IPs
- When investigating suspected data breach involving S3-stored sensitive data
- When building detection rules for S3 data loss prevention monitoring
- When responding to Macie alerts about sensitive data being accessed or moved
- When compliance requires monitoring and logging of all access to classified data stores
**Do not use** for preventing data exfiltration (use S3 bucket policies, VPC endpoints, and SCPs), for data classification (use Amazon Macie discovery jobs), or for network-level exfiltration detection (use VPC Flow Logs with network analysis tools).
## Prerequisites
