What sort of email scam is "Microsoft Office 365 Email Account Will Expire"

What kind of email is "Microsoft Office 365 Email Account Will Expire"?

We have examined this email and determined that it is a phishing scam. The message falsely claims that the recipient's Microsoft email account is about to expire and must be reactivated immediately. Clicking the button leads to a fake login page that harvests email credentials. This email should be ignored.

"Microsoft Office 365 Email Account Will Expire" scam email overview

The email mimics an official Microsoft notification, presenting Office 365 and Microsoft account branding. It claims the recipient's email account will expire within 24 hours, pushing them to click a button labeled "Re-Activate" to maintain access.

That button leads to a page titled "Welcome to Webmail," hosted on Google Firebase Storage - a legitimate cloud platform that scammers have abused to evade spam filters. The page displays a login form with username and password fields, and the username appears pre-filled based on the recipient's address.

Any credentials entered on that page go straight to the scammers. With access to an email inbox, cybercriminals can hijack linked accounts, intercept private messages, impersonate the victim, and use the account as a launchpad for further fraud.

Microsoft has no involvement with this email. Its name and branding appear here without authorization, used only to make the message look credible.

Email scams in general

This is a phishing campaign targeting email account credentials through a fake Microsoft notification. The scam manufactures urgency to push recipients toward a fraudulent login page. In some cases, email campaigns like this also serve as delivery vehicles for malware.

More examples of email scams that use similar impersonation tactics are Verify Your Email Server Account, CitiBank Compensation Fund Deposit, and Mandatory Verification/Update Process.

How do spam campaigns infect computers?

Cybercriminals use email to deliver malware by attaching harmful files or embedding links to dangerous sites. Common attachment formats include executable programs, compressed archives, Office documents, PDFs, and script files. Opening them - or enabling malicious macro commands in a document - can silently install malware on the device.

Links in these emails work similarly. Clicking one may open a site that downloads malware automatically, or a page that tricks the user into running a harmful file. In both cases, the computer is at risk only if the user acts - simply receiving or reading the email does not cause an infection.

How to avoid installation of malware?

Treat emails from unfamiliar or unexpected sources with caution. Urgent warnings about expiring accounts are a pressure tactic scammers rely on frequently. Legitimate services communicate account issues through their official apps and portals - not through alarming emails demanding immediate clicks.

Only download software from official websites and authorized app stores. Avoid cracked programs and key generators, which are often bundled with hidden malware. Keep the operating system and all installed applications updated to minimize exposure to known security gaps.

Use a reputable antivirus tool and run scans regularly. If you have already opened a suspicious attachment, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate any infiltrated malware.

Text presented in the "Microsoft Office 365 Email Account Will Expire" email letter:

Subject: Email Account Will Expire

Office 365

Microsoft account

Email Account Will Expire in 24 Hours

Your Microsoft Email account will expire in 24 hours reactivate by clicking on the reactivation button below.
[Re-Activate]

To opt out or change where you receive security notifications, [click here].

Sincerely,
The Microsoft Online Services Team

A fake webmail login page used in this scam:

Instant automatic malware removal:

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Quick menu:

• What is Microsoft Office 365 Email Account Will Expire phishing scam?
• Types of malicious emails.
• How to spot a malicious email?
• What to do if you fell for an email scam?

Types of malicious emails:

Phishing Emails

Most commonly, cybercriminals use deceptive emails to trick Internet users into giving away their sensitive private information, for example, login information for various online services, email accounts, or online banking information.

Such attacks are called phishing. In a phishing attack, cybercriminals usually send an email message with some popular service logo (for example, Microsoft, DHL, Amazon, Netflix), create urgency (wrong shipping address, expired password, etc.), and place a link which they hope their potential victims will click on.

After clicking the link presented in such email message, victims are redirected to a fake website that looks identical or extremely similar to the original one. Victims are then asked to enter their password, credit card details, or some other information that gets stolen by cybercriminals.

Emails with Malicious Attachments

Another popular attack vector is email spam with malicious attachments that infect users' computers with malware. Malicious attachments usually carry trojans that are capable of stealing passwords, banking information, and other sensitive information.

In such attacks, cybercriminals' main goal is to trick their potential victims into opening an infected email attachment. To achieve this goal, email messages usually talk about recently received invoices, faxes, or voice messages.

If a potential victim falls for the lure and opens the attachment, their computers get infected, and cybercriminals can collect a lot of sensitive information.

While it's a more complicated method to steal personal information (spam filters and antivirus programs usually detect such attempts), if successful, cybercriminals can get a much wider array of data and can collect information for a long period of time.

Sextortion Emails

This is a type of phishing. In this case, users receive an email claiming that a cybercriminal could access the webcam of the potential victim and has a video recording of one's masturbation.

To get rid of the video, victims are asked to pay a ransom (usually using Bitcoin or another cryptocurrency). Nevertheless, all of these claims are false - users who receive such emails should ignore and delete them.

How to spot a malicious email?

While cyber criminals try to make their lure emails look trustworthy, here are some things that you should look for when trying to spot a phishing email:

• Check the sender's ("from") email address: Hover your mouse over the "from" address and check if it's legitimate. For example, if you received an email from Microsoft, be sure to check if the email address is @microsoft.com and not something suspicious like @m1crosoft.com, @microsfot.com, @account-security-noreply.com, etc.
• Check for generic greetings: If the greeting in the email is "Dear user", "Dear @youremail.com", "Dear valued customer", this should raise suspiciousness. Most commonly, companies call you by your name. Lack of this information could signal a phishing attempt.
• Check the links in the email: Hover your mouse over the link presented in the email, if the link that appears seems suspicious, don't click it. For example, if you received an email from Microsoft and the link in the email shows that it will go to firebasestorage.googleapis.com/v0... you shouldn't trust it. It's best not to click any links in the emails but to visit the company website that sent you the email in the first place.
• Don't blindly trust email attachments: Most commonly, legitimate companies will ask you to log in to their website and to view any documents there; if you received an email with an attachment, it's a good idea to scan it with an antivirus application. Infected email attachments are a common attack vector used by cybercriminals.

To minimise the risk of opening phishing and malicious emails we recommend using Combo Cleaner Antivirus for Windows. 

Example of a spam email:

What to do if you fell for an email scam?

• If you clicked on a link in a phishing email and entered your password - be sure to change your password as soon as possible. Usually, cybercriminals collect stolen credentials and then sell them to other groups that use them for malicious purposes. If you change your password in a timely manner, there's a chance that criminals won't have enough time to do any damage.
• If you entered your credit card information - contact your bank as soon as possible and explain the situation. There's a good chance that you will need to cancel your compromised credit card and get a new one.
• If you see any signs of identity theft - you should immediately contact the Federal Trade Commission. This institution will collect information about your situation and create a personal recovery plan.
• If you opened a malicious attachment - your computer is probably infected, you should scan it with a reputable antivirus application. For this purpose, we recommend using  Combo Cleaner Antivirus for Windows.
• Help other Internet users - report phishing emails to Anti-Phishing Working Group, FBI’s Internet Crime Complaint Center, National Fraud Information Center and U.S. Department of Justice.

Frequently Asked Questions (FAQ)

Why did I receive this email?

These messages are mass-distributed rather than personally targeted. Cybercriminals collect email addresses from data breaches, fake sign-up pages, and similar sources, then send the same email to large numbers of recipients at once.

I have provided my personal information when tricked by this email, what should I do?

Change the password for your email account right away, and update passwords on any other accounts that share the same credentials. If payment details or identification documents were also submitted, contact the relevant financial institution or authorities immediately.

I have downloaded and opened a malicious file attached to an email, is my computer infected?

It depends on the file type. Executable files can compromise a system as soon as they are opened. Documents and archives typically require an extra step from the user - such as enabling macros or running an embedded installer - before any malware activates.

I have read the email but did not open the attachment, is my computer infected?

No. Reading an email on its own poses no risk. A system is put in danger only when the user clicks a malicious link or opens a harmful file. If you only viewed the message without interacting with its content, your computer should be unaffected.

Will Combo Cleaner remove malware infections that were present in email attachment?

Combo Cleaner can detect and remove a wide range of malware. Performing a full system scan is recommended to ensure all threats are found, as sophisticated malware can sometimes conceal itself deep within the system.