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AskCyber Home » News » News » Microsoft Reports Massive Office 365 Phishing Campaign

Microsoft Reports Massive Office 365 Phishing Campaign

2020-07-07 by Max

Microsoft Phishing

Microsoft Office Phishing Campaign Targets Millions of Office 365 Accounts in 62 Countries to Steal Information and Money

Microsoft Office customers were targeted by a massive email phishing campaign. Threat actors sent phishing emails to millions of Microsoft Office 365 users across 62 countries attempting to steal account credentials, sensitive information, and money. The campaigns targeted business leaders across a variety of industries, says a post by Microsoft.

The phishing email campaigns began in December and attempted to compromise accounts, steal contact lists, and pilfer sensitive documents from business users. The threat actors altered their tactics to evade detection by automated security apps in use by Microsoft. They then ramped up their efforts targeting millions of inboxes. The same threat actors had revised their phishing emails to include pandemic related messaging and lures in more recent campaigns. These are all forms of a business email compromise (BEC) attack.

RELATED:

  • Office 365 Phishing Scam Targets Wells Fargo Bank Customers
  • Hacked SharePoint Site Used to Phish Office 365 Credentials
  • Microsoft Warns of Amex Phishing Email
  • Email Phishing Scam Spoofs SurveyMonkey

According to the Federal Bureau of Investigation (FBI) 2019 Internet Crime Report, business email compromise attacks cause over half of financial losses – over $1.7 Billion USD.

“While most of the public’s attention in recent years has justifiably focused on the malign acts of nation-state actors, the increasing economic harm caused by cybercriminals must also be considered and confronted by the public and private sectors,” says the post from Microsoft. Phishing Emails Evolve

Phishing Emails Evolve

The early attacks used generic messaging about reports, invoices, or other business-related matters in order to lure the reader into clicking on links that redirected them to credential phishing apps. Rather than using a fake website to prompt the user for login information, the threat actors used web apps to collect login credentials in a not-so-obvious manner. Web apps are familiar to many employees and therefore do not garner the same level of suspicion that a spoof website might.

The attack “targeted business leaders across a variety of industries, attempting to compromise accounts, steal information and re-direct wire transfers,” Microsoft said Tuesday in a blog post. The campaign was vast, hitting millions of Microsoft Office 365 users with attempted hacks in a single week, the company said.

READ: NCSC Reports 1M Phishing Emails in Last 60 Days

Microsoft was able to stop the phishing attacks by filing a preliminary injunction against the registries of the internet domains used by the threat actors. A civil case filed in the U.S. District Court for the Eastern District of Virginia, allowed Microsoft to disable the internet domains used to launch the phishing attacks. Legal action was required because the cybercriminals had quickly evolved their campaign to evade detection then massively scaled up the attacks.

How Do I Protect Myself Against Phishing Campaigns?

  1. Enable two-factor authentication (2FA) or multi-factor authentication (MFA) on all business and personal email accounts. Use 2FA on social media accounts and any other online account that allows it as a security feature
  2. Use an authenticator app when possible. This adds another layer of security for online logins
  3. Read our guide on How to Spot a Phishing email
  4. Read our guide on common types on online scams
  5. Use a quality security app to alert you to suspicious links and fraudulent websites. Free security apps are not always updated with the latest information. These apps are a low coast way to safeguard your money. 

Filed Under: News Tagged With: Microsoft, phishing

About Max

Max is a Data Privacy Coordinator at a major global law firm and a science fiction author residing in the Philadelphia area. He has been writing for https://www.askcybersecurity.com since early 2017.


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