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“This can be mitigated really easily with user training,” Kelly Yeh, president of Chantilly, Va.-based Microsoft partner Phalanx Technology Group, tells CRN. “We call it layer eight problems — the layer between the chair and the desk is the biggest problem that IT guys always have.”
Details are scarce so far, but Microsoft is warning Office users about a bug that’s dubbed CVE-2021-40444, and described as Microsoft MSHTML Remote Code Execution Vulnerability.
The bug doesn’t have a patch yet, so it’s what’s known as a zero-day, shorthand for “the Good Guys were zero days ahead of the Bad Guys with a patch for this vulnerability.”
In other words: the crooks got there first.
A zero-day, shorthand for “the Good Guys were zero days ahead of the Bad Guys with a patch for this vulnerability.”
As far as we can tell, the treachery works like this:
MSHTML isn’t a full-on browser itself, but it forms the core “web engine” of Internet Explorer, and can be used on its own to create browsers or browser-like applications that need or want to display HTML files. Find out more here
HTML isn’t just for browsing
What this means is that HTML rendering bugs don’t just affect your browser and your browsing activity.
There are often many different ways for cybercriminals to poke a virtual stick into vulnerabilities in your operating system’s web rendering code, and thereby to probe for exploits, without needing your browser to be open at all.
That’s what CVE-2021-40444 seems to do, with the attack being delivered via Office files loaded into Word, Excel and so on, rather than by web pages viewed directly in your browser.
Although Microsoft no longer recommends the use of Internet Explorer, saying instead that “customers are encouraged to move to Microsoft Edge”, the features and the flaws of the MSHTML web rendering engine at the heart of Internet Explorer remain part of the operating system itself.
Don’t be tempted to look at content just because an email or a document happens to align with your interests, your line of work, or your current research. That doesn’t prove that the sender actually knows you, or that they can be trusted in any way – that information is probably publicly available via your work website or your own social media posts.
By default, Office documents received via the internet (whether by email or web) open in a way that prevents active content such as Visual Basic macros and ActiveX controls from running. If you see a yellow bar at the top of the page, warning you that potentially dangerous parts of the document were not activated, resist clicking the
[Enable Content] button, especially if the text of the document itself “advises” you to!
Pacific City Bank: Financial Institution
Risk to Business: 1.623 = Severe
Pacific City Bank, a California-based bank that focuses on the Korean-American community, was rocked by ransomware. The bank was hit by the AVOS Locker ransomware gang last week. On Saturday, September 4, 2021, the ransomware gang added the bank to its leak site and published some screenshots as proof of the hack including a ZIP archive that contains a series of documents allegedly stolen from the bank. The incident is under investigation.
Individual Impact: No information was available at press time to say if employee, customer or consumer financial details or PII was compromised in this incident but since it is a bank that’s highly likely.
Customers Impacted: Unknown
How It Could Affect Your Business: Ransomware gangs have been hungry for financial industry data and they’ve been stepping up attacks against targets that have it, especially small-time players that tend to have weak security.
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DuPage Medical Group: Healthcare Practice
Risk to Business: 1.636 = Severe
DuPage Medical Group is notifying 600,000 patients that their personal information may have been compromised during a July cyberattack. The largest independent physician group in Illinois experienced a computer and phone outage that lasted nearly a week in mid-July. Investigators determined that the incident was caused by unauthorized actors who accessed its network between July 12 and July 13.
Individual Risk: 1.866 = Severe
The investigators determined that files containing patient information including names, addresses, dates of birth, diagnosis codes, codes identifying medical procedures and treatment dates may have been exposed. For a small number of people, Social Security numbers may have been compromised.
Customers Impacted: 600,000 patients
How It Could Affect Your Business Exposed medical data isn’t just a disaster upfront. Big penalties from state and federal regulators can cause damage that’s hard to recover from.
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Career Group, Inc.: Staffing Company
Risk to Business: 1.673=Severe
California-based staffing service Career Group, Inc. Experienced a data breach, between June 28 and July 7. In the company’s letter to regulators, it stated that it had received assurances from the cybercriminals involved that its data would be deleted, indicating a probable ransomware incident.
Individual Risk: 1.673=Severe
The company noted in a letter to the Maine Attorney General’s Office the fact that the stolen data included PII from applicants and placements including Social Security numbers, but no further details were available at press time.
Customers Impacted: 49,476
How It Could Affect Your Business Staffing services are a goldmine for cybercriminals because they offer the opportunity to quickly score a large amount of desirable financial data and PII.
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Howard University: Institution of Higher Learning
Risk to Business: 1.917 = Severe
Howard University announced that they are investigating a ransomware attack. The incident disrupted online classes for several days. In person instruction was unaffected. The school’s Enterprise Technology Services (ETS) intentionally shut down the university’s network to investigate. So far, investigators have not found that any personal data on staff or students has been stolen.
Individual Impact: No information was available at press time about the types of data that was stolen if any.
Customers Impacted: Unknown
How It Could Affect Your Business Schools of every size have been prime targets for cybercriminals since the beginning of the pandemic, and that pressure is not relenting.
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