Password Spraying AWS IAM Users

Performing password spray attacks against AWS console users can lead to successful credentials validation and, in turn, access to the AWS user and AWS account.

We need to know the AWS Account ID for this technique to work. Refer to Discover AWS Account IDs for methods on how to obtain this.

Understanding Password Spraying Attacks

• Password spraying involves trying a password against multiple accounts to avoid account lockout policies that may exist

• Essentially, we're "guessing" the password and hoping it's valid for an account

• Having MFA enforced for users is a great mitigating control to thwart this attack

Password Spraying Requirements

• For this attack to work, the AWS Account ID should be known and we must have a list of usernames and passwords to test with

• AWS IAM Account IDs can be discovered in several ways e.g.,

  • Discover AWS Account IDs

• AWS IAM usernames can be discovered in several ways e.g.,

  • Unauthenticated IAM User and Role Enumeration

  • Discover AWS IAM Users

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Methods to Password Spray AWS Console Users

GoAWSConsoleSpray

• GoAWSConsoleSpray can be used to discover valid credentials for AWS console users

• While AWS console users have a username and password, it's worth noting that with valid AWS IAM Access Keys and the right permission, console login credentials can be generated for the associated user

./go/bin/GoAWSConsoleSpray -a 111111111111 -u users.txt -p passwords.txt

2024/12/07 22:40:14 GoAWSConsoleSpray: [2] users loaded. [2] passwords loaded. [4] potential login requests.
2024/12/07 22:40:14 Spraying User: arn:aws:iam::111111111111:user/jonsnow
2024/12/07 22:40:14 (jonsnow)	[+] SUCCESS:	Valid Password: Password!@# 	MFA: false
2024/12/07 22:40:14 Spraying User: arn:aws:iam::111111111111:user/whitewalker

• Using the tool, we shared a list of 2 usernames and 2 passwords, and got a valid hit on the user jonsnowand a password of password!@#