Credential Stuffing: Overview

Credential stuffing is a very common type of cyberattack where cybercriminals use lists of stolen credentials, usually obtained from previous data breaches, attempting to access different accounts/websites. Once logged in, hackers will take over the account.

How Credential Stuffing Works

Firstly, hackers gather lists of usernames and passwords stolen in data breaches or buy them from obscure sites on the dark web. Stolen password lists can include millions of compromised credentials and are often available to bad actors for a relatively small sum.

Secondly, cybercriminals often use bots to login to many websites at once. Nowadays, they utilize AI bots which are new hacking tools that are very good at imitating real user behavior.

NOTE! Such smart tools add random delays and mouse movements to successfully avoid security systems.

Hackers use specific tools to quickly change network addresses because fake locations help mask the real source of the attack effectively.

Attackers will always look for weak spots in how websites handle the login process. Issues with password reset give hackers more options and ways to break in. Unfortunately, a poor setup is usually the main cause of a successful cyberattack.

Major Consequences

When hackers use credential stuffing to access and control your users’ business accounts, they can quickly damage your finances, your brand, and eventually reduce the level of trust customers have in your organization.

Let’s take a deep look at how this type of attack can affect your organization.

Credential stuffing attacks allow hackers to make illegal transactions on behalf of legitimate users. The burden of supporting affected customers, investigating incidents, and taking steps to prevent future breaches is never easy.

If a credential stuffing attack exposes customer information or causes financial harm, customers will probably lose faith in the organization and will stop collaborating with a company that suffered a data breach that exposed any sensitive information.

Regulators fine organizations that fail to prevent credential stuffing. For instance, Geico, one of the largest auto insurers in the country, was fined $9.75 million in 2024 when a credential stuffing attack allowed unauthorized access to sensitive customer data.

Prevention Methods

Stopping cyberattacks of this sort before they happen requires strategic planning, proactive measures, and the right tools to block hackers. Combining multiple layers of defense is more cost-effective than addressing weaknesses after an attack.

Here are several ways you can use to combat credential-stuffing attacks.

Advanced multi-factor authentication (MFA)

Adding a second login step, like a code sent to the user’s phone, can block unauthorized access even when the hacker has obtained the password.

User behavior assessment

Behavior assessment software can further enhance protection by analyzing user behavior and interaction patterns. Such software can identify fake logins even if the right password was used.

Zero-trust architecture

Test and implement security systems that require users to prove their identity with every login attempt. Also, only users with the appropriate rights should be able to access sensitive files or applications.

Adaptive rate limiter

A software solution that detects rapid login attempts, usually performed by bot networks, is a game changer.

Limiting the number of logins will allow security teams to investigate and protect your organization against credential stuffing attacks. Also, it doesn’t interfere with real users.

Advanced bot detection

Deploy machine learning solutions that enable your team to differentiate between user logins and automated activity patterns.

Passwordless authentication protocols

Implement passwordless authentication methods that use cryptographic keys or biometric access systems. Such systems eliminate the risks associated with traditional passwords, making stolen credentials useless.

Credential update

Ensure login credentials are regularly updated by using automated systems that force resets when potential malicious attempts are detected, reducing the risk of data breaches.

Deception technology

Set up decoy systems to divert cybercriminals from your assets. These systems will help your security team improve your security protocols by gathering valuable data on emerging hacking techniques.

Penetration testing

Carrying out regular penetration testing is paramount as you can use the findings to strengthen your security measures.

Threat intelligence

Staying updated on emerging exploits ensures your cybersecurity remains effective in the face of new threats.

Final Thoughts

Cybercriminals launch credential stuffing attacks from different countries sometimes simultaneously. Spreading attacks across the globe makes it harder to prevent or mitigate.

For a professional approach against this popular type of cyberattack, please reach out to StratusPointIT. Keeping your enterprise, your people, and your data safe is our commitment.