Suspicious usage of EC2 token

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	5 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	Low

Description

An AWS EC2 STS token was used externally from an EC2 instance.

Attacker's Goals

Exfiltrate token and abuse it remotely.

Investigative actions

• Check if the access key was generated by the attached instance.
• Check what actions were executed by the access key.
• Check if the relevant instance is compromised.

Variations

Suspicious usage of EC2 token

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 EC2 STS token was used externally from an EC2 instance.

Attacker's Goals

Exfiltrate token and abuse it remotely.

Investigative actions

• Check if the access key was generated by the attached instance.
• Check what actions were executed by the access key.
• Check if the relevant instance is compromised.