Remote usage of AWS Lambda's role

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Remote usage of AWS Lambda's role

An AWS Lambda's role was used externally of the cloud environment.

Module:: Cortex Cloud
Licensed by:: Cloud Runtime Security (CRS)
Data source:: AWS Audit Log

ATT&CK tactics: Credential Access (TA0006) Initial Access (TA0001)

ATT&CK techniques: Steal Application Access Token (T1528) Unsecured Credentials (T1552) Valid Accounts: Cloud Accounts (T1078.004)

Attacker's goals:

Exfiltrate token and abuse it remotely.

Investigative actions:

Check if the IAM role was assumed by an unknown identity. Check what API calls were executed using the access-key.

Test period:: N/A (single event)
Deduplication:: 7 Days

5 variations:

Remote command line usage of AWS Lambda's role High (parent: Informational)
Suspicious usage of AWS Lambda's role Medium (parent: Informational)
Suspicious usage of AWS Lambda's role Low (parent: Informational)
Suspicious usage of AWS Lambda's role High (parent: Informational)
Usage of AWS Lambda's role from a known ASN Informational