Remote usage of AWS Lambda's role

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	7 Days
Required Data	AWS Audit Log
Detection Modules	Cloud
ATT&CK Tactic	Credential Access (TA0006), Initial Access (TA0001)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552), Valid Accounts: Cloud Accounts (T1078.004)
Severity	Informational

Description

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

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.

Variations

Remote command line usage of AWS Lambda's role

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Initial Access (TA0001)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552), Valid Accounts: Cloud Accounts (T1078.004)
Severity	High

Description

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

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.

Suspicious usage of AWS Lambda's role

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Initial Access (TA0001)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552), Valid Accounts: Cloud Accounts (T1078.004)
Severity	Medium

Description

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

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.

Suspicious usage of AWS Lambda's role

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Initial Access (TA0001)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552), Valid Accounts: Cloud Accounts (T1078.004)
Severity	Low

Description

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

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.

Suspicious usage of AWS Lambda's role

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Initial Access (TA0001)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552), Valid Accounts: Cloud Accounts (T1078.004)
Severity	High

Description

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

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.

Usage of AWS Lambda's role from a known ASN

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Initial Access (TA0001)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552), Valid Accounts: Cloud Accounts (T1078.004)
Severity	Informational

Description

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

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.