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Find fake login pages that get past two-step login

In a man-in-the-middle attack (adversary-in-the-middle, or AiTM), a fake login page on a domain like yourcompany-login.com passes what you type to the real site. The criminal gets your password, the two-step code and the logged-in session. We find those domains and get them taken down.

Codes and app prompts do not stop this. Hardware security keys do.

Fake login page already live?

Report a live attack

Free to report. No account needed. One of our team calls you back, usually the same working day.

Check for lookalike domains

Checks 150+ lookalikes of your domain in a couple of minutes and shows which are registered. No account, no card. We email the report to a work address, not Gmail or Outlook.com.

Prefer to talk first? Book a demo

Out of hours, email security@defenddomain.com.

In our consultancy case, a copy of the company’s website with a valid padlock sat on a free hosting platform, with no lookalike domain behind it. The certificate logs and the website marker found it.

It is a copied-website case, not a relay one, and it shows the two checks a relay page cannot avoid. One report with the evidence went to the hosting platform on the day the copy was confirmed, and about 24 hours later the copy was offline.

Three ways logins get stolen, and the one we cover

Not covered

A plain fake login page

A copy of a login page that stores what you type.

Two-step login stops the criminal using the password alone.

Not covered

Passwords leaked from other sites

Logins stolen elsewhere and tried on your systems.

Unique passwords, and blocking passwords known to have leaked, handle this.

Where we help

A fake page that relays to the real site

A copy of your login page on a lookalike of your domain, with a valid padlock, that passes everything through to the real site.

The registrar and the host can switch it off. We find it, send them the evidence and chase them until it is offline.

How a man-in-the-middle login page works

The attack

  1. Your customer

    Opens yourcompany-login.com

    Types password and code

  2. Criminal’s relay page

    Fake site with a valid padlock

    Passed on

  3. Your real site

    yourcompany.com sees a normal login

Password, two-step code and login session taken

What we do

  1. DefendDomain alert

    Lookalike, new certificate or relayed login page

    You confirm

  2. Evidence sent

    Registrar, host and browser warning lists

    They act

  3. Your customer

    Sees a browser warning, then the site goes offline

We chase automatically until it is offline.

Fake login pages we find

Each of these sits on a web address made to look like the real company's.

  • Fake logins

    Fake logins that relay to the real site

    yourcompany-login.com

    The kind this page is about: built to get past two-step login, as the diagram above shows.

  • Fake logins

    Plain fake login pages

    yourcompany-signin.com

    A copy of your login page on a lookalike of your domain that stores whatever is typed.

  • QR codes

    QR codes that open a fake login

    yourcompany-portal.com

    A QR code in an email or on a poster that opens a fake login page on a lookalike domain.

Who it is for

Usually IT and security. In a small firm, whoever looks after Microsoft 365.

  • IT and security

    Know which addresses to block

    Each alert carries the domain, so it goes onto your web filter or sign-in rules while the takedown runs.

  • Microsoft 365 and identity admins

    The evidence in one alert

    The lookalike, its certificate and the evidence pack, so you can check it against your sign-in logs.

  • Owners and directors

    No security team needed

    On Pro, one person reads each alert and approves a takedown with one click. On Enterprise, our analysts do it for you.

  • SOC and incident response

    Alerts in your own tools

    Alerts go by email, Slack, Microsoft Teams, SMS or webhook, or into Splunk, Microsoft Sentinel or Wazuh, with the domain and what was found.

What your current defences do not see

All four are worth keeping. None of them watches the web addresses made to look like yours.

“We use two-step login everywhere”

Keep it. Codes and app prompts can be passed on by a fake page as you type them. Hardware security keys check the web address and resist this. We find the fake pages that use a name like yours, whichever second step your users have.

How two-step login gets bypassed

“HTTPS protects our users”

HTTPS encrypts the connection to whatever server you reach, including the criminal’s. A padlock says nothing about who runs the site. It does leave a record: the certificate behind every padlock is published, and we read those logs for names like yours.

What the padlock really means

“Our network security catches intrusions”

The fake page runs on the criminal’s servers, not yours. Your firewall never sees the login. We watch from the outside, where the fake page has to be visible to its victims.

Beyond endpoint and network tools

“Threat feeds will flag it”

A feed lists a domain after someone reports it. We look for the lookalike while it is being set up, and when you confirm an attack we are one of the reporters those feeds hear from.

Blocklist and threat feed delays

How we find a relay page and get it taken down

Give us your domains. The first two checks need nothing else; the website marker is optional.

Step 1

We list lookalikes of your domains

Around 500 per domain, including your name plus words such as -login or -sso, letters that look the same, and other endings such as .co. Each one is re-checked every hour.

Step 2

We watch new certificates

A relay page needs a padlock: without one the browser marks a login form as not secure. The certificate behind it is published in public logs, and we watch 100+ of them as entries appear. In our software-group case, the certificate for the cloned site was matched within seconds of being logged.

Step 3

We hear when your page is relayed

The website marker is a small script or a 1×1 image on your login page. A relay passes your real page through, marker included, and when it loads the marker reports the address it loaded on. If that is not your domain, we alert you with that address.

Step 4

You confirm, we report and follow up

When you confirm it is a live attack, one click sends the evidence to up to 12 places at once: the registrar, the host and the email provider the lure went through, an abuse-report network, blocklists and threat feeds, browser warning lists and search engines. We chase the ones that do not act. We check every hour whether it is still online and tell you when it goes down. After that we keep watching and alert you if it comes back.

What a relay-page alert shows you

The lookalike, its certificate, and the address your login page was loaded through if the marker caught it. The evidence pack adds screenshots, who registered the domain and where it is hosted, each with the time it was captured.

No report goes to a registrar, host or blocklist until you confirm it is a live attack and type the domain to approve.

New threat
CriticalExample
yourcompany-login.com

Impersonating yourcompany.com

Your sign-in page, loaded through another address.

Threat signals

Copies your website
Your website marker loaded here
Login form on the page
Asks for a password and code
Certificate issued
Public certificate logs
Take it downThis is ours

What a software group’s cloned site looked like

Case study, early 2026

Cloned website taken down

A copied-website case, not a relay one. Weeks after an acquisition was announced, someone registered a European software group’s exact name on a different domain ending and put up a near-identical copy of its website. A relay page starts the same way: a name like yours, a certificate for it and a copy of your page.

Read the case study
What happened
Offline
  1. Weeks after an acquisition was announcedIts exact name registered on another ending, with a near-identical copy of the site
  2. Flagged at registration; the certificate was matched within seconds of being logged
  3. One-click takedown: the evidence went to ten places
  4. Offline before any customer was known to use it

From the case. Names changed.

Questions security teams ask

We do not look for the toolkit. Whatever is used, the page it serves sits on a web address, almost always behind a certificate, and both are public before the first lure is sent. That is what we watch.

A wildcard certificate (*.example.com) hides the full name of each site, so certificate logs show less. The lookalike checks and the website marker still apply.

See what we would find for your domains

In a 30-minute demo we show you the lookalikes of your domain that exist today and how the website marker works on a login page.

  • Which lookalikes of your domain exist now, and which have a certificate
  • How the website marker goes on your login page, if you want it
  • A clear annual price for your domains

A relay page already live? Report a live attack