Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Operations

7/7/2020
03:15 PM
Connect Directly
Twitter
LinkedIn
RSS
E-Mail
50%
50%

Microsoft Seizes Domains Used in COVID-19-Themed Attacks

Court grants company's bid to shut down infrastructure used in recent campaigns against Office 365 users.

Microsoft has quietly seized control of several domains that were used in COVID-19-themed attacks against its customers over the past several months.

The US District Court for the Eastern District of Virginia had earlier granted the company permission to seize the domains after Microsoft had filed a civil complaint about the attacks causing it "irreparable and ongoing harm."

Tom Burt, Microsoft corporate vice president, customer security and trust, today likened the attacks to a form of business email compromise that targeted customers in 62 countries.

The attacks first began in December 2019 and involved phishing emails designed to look like they originated from the recipient's employer or other trusted source. Many of the emails were directed at business leaders in a variety of industries and — initially, at least — contained messages pertaining to common business activities. When a recipient clicked the embedded link in these emails, it led to a sequence of events that ended with the user being prompted to grant access privileges to a malicious web app.

The fraudulently obtained privileges gave the attackers full access to the victim's Office 365 account, including email, contact lists, and data stored in OneDrive for Business and in corporate SharePoint document management and storage systems. Unlike typical phishing scams, the attackers in this case were able to gain full, unauthorized access to Office 365 accounts without requiring victims to share their usernames or passwords via fake websites and other interfaces, Burt said in a blog post.

"After clicking through the consent prompt for the malicious web app, the victim unwittingly granted criminals permission to access and control the victims' Office 365 account contents," he noted.

Microsoft was able to stop the original wave of attacks using "technical means" to block the criminals and disable the malicious web applications, Burt said, without elaborating on what those measures were.

However, Microsoft recently observed renewed attempts by the same attackers to gain access to Office 365 accounts, this time using COVID-19-themed lures. The new attacks involved millions of phishing emails being sent to Microsoft business users in more than five dozen countries, prompting the company to seek legal action. In its complaint, Microsoft described the scale of the attacks as "immense" and said the criminals posed an ongoing risk because of their ability to create and deploy new malicious web apps using their existing infrastructure.

Unique Civil Case
"This unique civil case against COVID-19-themed BEC attacks has allowed us to proactively disable key domains that are part of the criminals' malicious infrastructure, which is a critical step in protecting our customers," Burt said.

It's unclear when exactly Microsoft seized control of the allegedly malicious domains or even how many of them it has seized so far. The company's complaint lists six dot-com domains that it said were being used as infrastructure for carrying out the attacks. Each of the domains had names that suggest a connection to Microsoft Office products. Domain registration service Namecheap was listed as the registrar for five of the domains identified in Microsoft's complaint and GoDaddy LLC for the sixth.

COVID-19-themed attacks, such as those targeting Microsoft Office 365 accounts, have become very common over the past several months. Threat actors have been attempting to take advantage of the global concern around the pandemic with email and social engineering lures pertaining to COVID-19-related topics, such as purported cures for the vaccine or some new development related to the virus. Often the lures have led unsuspecting users to malware-laden websites or to fake web pages designed to steal their credentials. Attackers have registered thousands of coronavirus-themed domains in the past several months to scam unsuspecting Internet users in a variety of ways.

The trend has forced organizations to look more closely at new measures and approaches — such as zero trust — for protecting their networks and data against infected systems belonging to employees working from home.

Related Content:

Jai Vijayan is a seasoned technology reporter with over 20 years of experience in IT trade journalism. He was most recently a Senior Editor at Computerworld, where he covered information security and data privacy issues for the publication. Over the course of his 20-year ... View Full Bio
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Threaded  |  Newest First  |  Oldest First
COVID-19: Latest Security News & Commentary
Dark Reading Staff 10/23/2020
7 Tips for Choosing Security Metrics That Matter
Ericka Chickowski, Contributing Writer,  10/19/2020
Russian Military Officers Unmasked, Indicted for High-Profile Cyberattack Campaigns
Kelly Jackson Higgins, Executive Editor at Dark Reading,  10/19/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-24847
PUBLISHED: 2020-10-23
A Cross-Site Request Forgery (CSRF) vulnerability is identified in FruityWifi through 2.4. Due to a lack of CSRF protection in page_config_adv.php, an unauthenticated attacker can lure the victim to visit his website by social engineering or another attack vector. Due to this issue, an unauthenticat...
CVE-2020-24848
PUBLISHED: 2020-10-23
FruityWifi through 2.4 has an unsafe Sudo configuration [(ALL : ALL) NOPASSWD: ALL]. This allows an attacker to perform a system-level (root) local privilege escalation, allowing an attacker to gain complete persistent access to the local system.
CVE-2020-5990
PUBLISHED: 2020-10-23
NVIDIA GeForce Experience, all versions prior to 3.20.5.70, contains a vulnerability in the ShadowPlay component which may lead to local privilege escalation, code execution, denial of service or information disclosure.
CVE-2020-25483
PUBLISHED: 2020-10-23
An arbitrary command execution vulnerability exists in the fopen() function of file writes of UCMS v1.4.8, where an attacker can gain access to the server.
CVE-2020-5977
PUBLISHED: 2020-10-23
NVIDIA GeForce Experience, all versions prior to 3.20.5.70, contains a vulnerability in NVIDIA Web Helper NodeJS Web Server in which an uncontrolled search path is used to load a node module, which may lead to code execution, denial of service, escalation of privileges, and information disclosure.