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Stop Reverse-Proxy Phishing From Bypassing MFA

Reverse-proxy phishing kits capture credentials and one-time passcodes in real time, letting attackers walk through MFA with a valid login. Arkose Titan exposes the proxy behind the session and stops the takeover, while real customers and trusted AI agents sign in without friction.

Stop Reverse-Proxy Phishing From Bypassing MFA

MFA Compromise Results From Arkose Labs Customers

Multinational Bank
50

Phishing domains uncovered in 4 days, protecting 70M+ customers from MFA compromise.

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Rapid-Growth Fintech Platform
99%+

Reduction in successful phishing attacks, with 6.4M token replay attacks stopped.

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What Is MFA Compromise?

Even MFA can't stop an attacker holding a valid one-time passcode.

MFA compromise happens when an attacker captures a valid multi-factor authentication code or session token, most often through reverse-proxy phishing, also called adversary-in-the-middle (AITM) phishing. A victim clicks a malicious link and lands on a phishing site that sits between them and your real login page. Everything they enter — username, password and one-time passcode — is relayed to your site in real time, and the proxy keeps the session cookie.

Because the credentials and code are genuine, the login succeeds and looks legitimate to your security stack. Phishing-as-a-service kits such as EvilProxy and Tycoon2FA put this attack in anyone's hands. In an Arkose Labs analysis of 250 suspicious domains targeting three login endpoints, traditional phishing detection caught only 10.

How Reverse-Proxy Phishing Bypasses MFA

The diagram below shows how a reverse-proxy phishing attack turns a legitimate login into a hijacked session in five steps.

  1. User Enters Credentials The user types a username, password and MFA code into the phishing site, thinking it's your real login page.
  2. Proxy Forwards to Your Site The malicious proxy relays those credentials to your actual login system in real time.
  3. Your System Validates The credentials and MFA code are correct, so the login succeeds.
  4. Attacker Steals the Session The proxy captures the session cookie, giving the attacker full account access.
  5. Attacker Has Full Access With an active session, the attacker can access the account, make changes and commit fraud while bypassing future MFA checks.

MFA Compromise Prevention With Arkose Titan

Arkose Titan validates every sign-in in real time, exposing the proxy infrastructure behind phishing sessions so stolen credentials and codes are useless to attackers.

One platform for agent trust and fraud prevention: identifies people, bots and AI agents, and applies your rules through one integration.
24/7/365 SOC and threat research: tracks emerging fraud schemes and new attack tactics before they reach you.
Explore the Arkose Titan Platform →
01

Expose Proxy Infrastructure

Nearly 1,000 detection signals reveal reverse-proxy infrastructure even when the credentials and MFA code are genuine.

02

Make Relayed Logins Fail

Dynamic, evolving challenges can't be automated or relayed by reverse proxies, so intercepted credentials and codes are useless to attackers.

03

Validate Every Authentication

Every sign-in is assessed in real time instead of trusting credentials and one-time passcodes alone.

04

Give Your Team the Full Picture

True/false API results and rich session data let security teams act immediately when a phishing campaign targets your customers.

What Our Customers Say

Arkose Labs has a fantastic solution that ends all bulk attacks against your system, manual or automated. Their managed service provides peace of mind and effective management on top of their incredible technology.
Sean H., CTO
Verified G2 User

Frequently Asked Questions

What toolkits do attackers use to run reverse-proxy phishing attacks?

Reverse-proxy phishing is increasingly run through commercial crimeware-as-a-service kits, such as EvilProxy and Tycoon2FA, that let attackers rent ready-made infrastructure to intercept credentials and MFA codes at scale.

What is reverse-proxy phishing?

Reverse-proxy phishing, also called adversary-in-the-middle (AITM) phishing, uses a fake site that sits between a user and the real one, intercepting credentials and MFA codes in real time as the user logs in.

How does MFA compromise play out in a real attack?

In a typical attack, a victim enters credentials and a one-time passcode into a fake site that relays them to the real login page in real time, letting the attacker in before the victim realizes anything is wrong.

What are the best MFA compromise solutions?

The strongest solutions validate every authentication attempt rather than trusting credentials alone, since reverse-proxy attacks use genuine, stolen MFA codes. Arkose Titan does this with real-time signals that expose proxy infrastructure even when the login itself looks legitimate.

Can AI agents be used for MFA compromise?

Yes. Attackers can use AI agents to automate phishing campaigns and relay stolen credentials at scale, while other agents sign in on behalf of real customers. Arkose Titan identifies AI agents at sign-in so you can decide which to allow and which to block.

Stop Reverse-Proxy Phishing at Every Sign-In

Protect customers from credential theft, one-time passcode interception and session hijacking across every authentication workflow.

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