Security – Page 7

Watch Out For Rise In Microsoft Office Attacks

July 6, 2018 by Joseph Martin

Menlo Security has recently published a new report that will probably dismay you if you’re a business owner.

Microsoft Office has been named as the attack vector of choice for hackers around the world. The most common form of the attack is a malicious Word document or other office document attached to an innocent looking email.

There are, of course, plenty of other ways to take advantage of various security weaknesses in MS Office and Office 365. These include the use of remotely hosted malicious components embedded within documents that deliver zero-day exploits when the document is opened.

The reason MS Office is such a wildly popular choice isn’t because it has an unusual number of security loopholes that can be exploited (although it’s certainly got its share). Rather, it has everything to do with the overwhelming popularity of the office suite. Simply put, lots of people use it on a regular basis, and that means the pool of potential victims is enormous.

As the report explains:

“There is likely to be an increase in attacks via malevolent email attachments using stealthily embedded, remotely hosted malicious components that leverage applications and operating system vulnerabilities, both old and new.

With CVE-2018-8174 and CVE-2018-5002, the attackers leveraged Word as a vector to exploit Adobe Flash Player and Internet Explorer. By using Word as the vector, the attackers were able to exploit a browser, even if it is not the default browser, and exploit Flash, even though Flash is blocked by most enterprises…Microsoft is therefore undoubtedly going to become the platform that attackers leverage most to deliver their zero-day exploits.”

All true, and beyond troubling. If your business uses Microsoft Office or Office 365 (and odds are excellent that it does), continued vigilance is the key.

Joseph Martin

President & CEO
I hope you enjoyed this article. My mission is to take your stress away from dealing with IT problems. Call (252) 565-1235 or send me a message at our contact us page if you have a question, comment or want help.

Vulnerability In Mac OS Went Unnoticed For Years

July 5, 2018 by Joseph Martin

Researchers at Okta Security have stumbled across something big. Recently, they discovered a flaw in Apple’s OS that would have allowed hackers to completely undermine Apple’s code signing process.

While at first glance that doesn’t sound so bad, the implications are terrifying. In a nutshell, code signing uses cryptographic “signatures” to verify and validate code. If code bears the digital signature, it is considered trusted. If it’s trusted, then it’s given an automatic free pass, straight into the heart of any system.

Unfortunately, this flaw in Apple’s code signing process dates back more than a decade. It was only recently discovered, and purely by chance at that.

An extensive forensic analysis has turned up no evidence suggesting that this exploit was ever used for nefarious purposes, which is the one silver lining in all of this.

Upon discovering the flaw, Okta personnel reached out to Apple and other vendors who could have been impacted by the flaw, including tech giants like Google, Facebook and also smaller players like VirusTotal, Objective Development, Yelp, and Carbon Black.

Apple moved swiftly and has since fixed the issue, so this one can be considered a bullet dodged.

Josh Pitts, an Okta engineer, sums the issue up:

“Different types of tools and products use code signing to implement actionable security; this includes whitelisting, antivirus, incident response and threat hunting products. To undermine a code signing implementation for a major OS would break a core security construct that many depend on for day to day security operations.”

A completely fair assessment. Thankfully (at least in this particular case), although the issue was hiding in plain sight, it does not appear to have been exploited before being fixed. We won’t always be so lucky.

Joseph Martin

Turn Cortana Off At Lock Screen To Avoid Potential Hack

July 4, 2018 by Joseph Martin

Do you use Cortana? It’s a handy virtual assistant (like Siri) built into Windows 10. Unfortunately, as useful as she is, there’s a problem. Even if you don’t use Cortana yourself, take heed: Microsoft has recently issued a security update based on findings by McAfee researchers.

It turns out that Cortana can be “summoned” from the lock screen of your PC and used to execute attacks by tricking the ever-helpful Cortana into indexing files from a USB drive, then executing them.

To accomplish the attack, the hacker would need physical access to the PC. Once they had that, they could easily execute Powershell scripts to reset your Windows 10 password, which would then give them unfettered access.

The vulnerability takes advantage of two things: First, Cortana “listens” for commands, even while the PC is locked. Then, the OS indexes files constantly so that they’re ready to use at a moment’s notice. Put those two elements together and you have the makings of a disaster.

Microsoft has rushed a patch out the door to address the issue. For now, the company is advising users to simply disable Cortana on the lock screen, so that your PC has to be unlocked in order for her to be active. It’s probably good advice, given that not all companies update their OS as soon as patches are available, and this one is important.

To be safe, even if you don’t use Cortana, go into settings and disable the virtual assistant on the lock screen. Then, when you’re away from your PC, at least that’s one less thing you have to worry about.

Unfortunately, this isn’t the first Cortana-related security issue we’ve seen, and it’s not likely to be the last. As useful as the feature is, it does open the door to a number of other (potential) problems. Stay vigilant.

Joseph Martin

New Trick Lets Hackers Bypass Office 365 Email Security

June 29, 2018 by Joseph Martin

What’s old is new again.

Hackers have recently begun re-deploying a decade-old trick called ‘ZeroFont’ to get around Microsoft’s security filters and deliver phishing and spam emails to Office 365 email accounts. The gimmick? Zero-point fonts.

As anyone with even passing familiarity to Office 365 knows, if you’re drafting a document, you can change the font size to suit your tastes and preferences. What few people realize is that you can use html code to set your font to zero-point size.

Of course, such a move has no practical application in everyday usage, because no one could read a zero-point font. Hackers, however, can make cunning use of it, and Office 365 is unable to detect the presence of zero-point fonts. Since they’re not detected, they’re not marked as malicious and sail right through the security filters.

By itself, the zero-point trick is useful, but not inherently deadly. Unfortunately, it can be combined with other tricks like Punycode, Unicode, or Hexidecimal code to insert malicious commands into what appears to be a totally innocent email.

It gets better (or worse, depending on your point of view). Just last month, researchers at a company called Avanan discovered that it was possible to use the HTML tag in an email or Office 365 document, point it at a malicious site, and the security filters would blithely ignore it.

Again, it should be noted that these tricks aren’t new. They’ve been around for years, fell out of favor in preference for newer techniques, and now are being recycled. Apparently, they’re so old that they skate right past modern security flags and filters.

Expect updates soon to catch these types of things, but in the short run, just be aware these types of attacks are not only possible, but trivial to execute.

Joseph Martin

Majority Of Web Apps Found To Have Security Vulnerabilities

June 29, 2018 by Joseph Martin

How many web apps do you have on your phone? Probably a ton. Here’s something you likely didn’t know. Based on the latest research from Positive Technologies, nearly half of them (48 percent) are vulnerable to unauthorized access.

As bad as that is, it’s just the tip of the proverbial iceberg.

Here are some additional disturbing stats from their report :

44 percent of the apps with vulnerabilities place the user’s personal data at risk

70 percent are prone to leak critical information stored on the device

96 percent of them contain flaws that would allow any malicious actor to exploit them to launch an attack on the target device

Of those, one in six (17 percent) has a flaw severe enough that it would allow an attacker to assume complete control over the app, and from there, the device itself

The majority of these flaws (some 65 percent) are the result of simple coding errors, with improper configuration of web servers being the most common of these.

There is one bright spot in the otherwise dismal report, though. The percentage of apps with critical vulnerabilities has declined slightly, down from 52 percent last year, and 59 percent the year before. So the numbers, while frustratingly large, are trending in the right direction.

Ed Keary, the CEO of Edgescan had this to say on the topic:

“DevSecOps needs to be embraced such that security is throughout the development pipeline. Application component security management (software components used by developers) is still not commonplace in terms of supporting frameworks and software components and is a common source of vulnerability.”

If your firm designs such applications, pay special attention to this report and review your code base at the earliest opportunity. Even if you don’t, it pays to be mindful of the percentages, because odds are that your employees have several at-risk apps on the devices they’re connecting to your network.

Joseph Martin

Google Cracking Down On 3rd Party Browser Extension Installs

June 28, 2018 by Joseph Martin

Malicious code can wind up on your PC or phone by any number of roads. Companies do their best to guard the digital passes, but invariably, things get missed and the hackers find a way in. It’s a constant battle, and sadly, one that the good guys are losing.

Recently Google has stepped up its efforts, this time by focusing on Chrome browser extensions installed by third parties. By the end of the year, no extensions will be allowed on Chrome except for those acquired via the Web Store.

James Wagner, Google’s Product Manager for the Extensions Platform, had this to say on the topic:

“We continue to receive large volumes of complaints from users about unwanted extensions causing their Chrome experience to change unexpectedly – and the majority of these complaints are attributed to confusing or deceptive uses of inline installation on websites.”

It’s a thorny problem, but industry experts broadly agree that Google is taking the right approach here. Beginning in September, Google plans to disable the “inline installation” feature for all existing extensions. The user will instead be redirected to the Chrome Web Store where they’ll have the option to install the extension straight from the source.

Then, in December 2018, the company will remove the inline install API from Chrome 71, which should solve the problem decisively.

Of course, hackers being hackers will no doubt find a way around that, but kudos to Google for taking decisive action here. While browser extensions aren’t a major attack vector, it’s troublesome enough that Google’s attention is most welcome.

It should be noted that one of the indirect benefits of Google’s plan is that it further bolsters the importance of user ratings of extensions. They’re highly visible on the Web Store, so anyone who’s considering installing something has a good, “at-a-glance” way of telling whether the extension is good or a scam. That’s information they wouldn’t get had the extension been installed inline.

Again, kudos to Google!

Joseph Martin

Another Vulnerability Found In Intel CPU’s

June 27, 2018 by Joseph Martin

More bad news for Intel. Yet another security flaw has been identified in the processors the company makes. This one is so newly discovered that the full technical details have yet to be released. Here’s what we know so far, from a recent Intel announcement:

“System software may opt to utilize Lazy FP state restore instead of eager save and restore of the state upon a context switch…Lazy restored states are potentially vulnerable to exploits where one process may infer register values of other process through a speculative execution side channel that infers their value.”

In simpler terms, what this means is that a hacker could use this exploit to gain partial cryptographic keys used by other programs running on the target computer.

While related to the recent Spectre and Meltdown security flaws, this one is different in two ways. First, it’s not quite as severe as the formerly discovered flaws in scope or scale. To make use of this, one would require an incredibly exotic attack that would simply be beyond the capabilities of most hackers.

Also, it should be noted that where Spectre and Meltdown impacted dozens of chipsets dating back more than a decade, the “Lazy FP State Restore” flaw only impacts chips beginning at Sandy Bridge.

The other key difference is that the flaw in this case, does not reside in the hardware. That’s good news for businesses of all shapes and sizes, because it means that when Intel and their hardware vendors have a patch ready, it will be quick and relatively painless to install it.

Unfortunately, since the initial discovery of Spectre and Meltdown, a number of variants of those flaws have emerged, and now this new one. It’s unlikely that this will be the last we’ve seen of these types of issues, so if you’re using Intel equipment, brace yourself. There’s likely more to come.

Joseph Martin

Some Private Posts On Facebook May Have Been Exposed

June 24, 2018 by Joseph Martin

Facebook is in hot water again. Recently, the company admitted that while testing a new feature on the site, they inadvertently made public the posts of more than fourteen million users. The incident occurred between May 18th and May 22nd and occurred when Facebook was testing a new “Featured Posts” enhancement.

The goal was that users could selectively make posts visible to everyone. Unfortunately, the error created a situation where any posts users in the test group made were automatically shared to everyone. The company found and corrected the mistake on May 27th, but during the intervening span of days, any posts those users made were set to global visibility. Facebook is currently in the process of contacting the impacted users and asking them to review any posts they made during the impact period.

Chief Privacy Officer Erin Egan had this to say: “To be clear, this bug did not impact anything people had posted before – and they could still choose their audience just as they always have. We’d like to apologize for this mistake.”

Unfortunately, this is not the first time in the recent past that Facebook has gotten into hot water over the mishandling of user data. Earlier this year, Facebook CEO Mark Zuckerberg had to testify before Congress when it came to light that the company acknowledged they had improperly shared private information pertaining to tens of millions of its users with Cambridge Analytica, which used the information in an attempt to influence the most recent presidential election.

Even if you’re not a member of the test group, if you use Facebook and made any posts between May 18th and May 27th when the company fixed the bug, it pays to review your posts just to make sure that their visibility has been properly set.

Joseph Martin

New InvisiMole Malware Turns Your System Into A Video Camera

June 22, 2018 by Joseph Martin

Another week, another new threat. This time, in the form of a new strain of malware that researchers are calling InvisiMole. The new threat was discovered by researchers at ESET, who found it on a number of hacked computers in Russia and the Ukraine.

While the researchers have yet to trace the software back to the group that developed it, based on the available evidence, the campaign appears to be tightly targeted and highly selective. Only a few dozen computers have been found to be infected, although all impacted systems are both high-profile and high-value.

As for the software itself, it’s a nasty piece of business capable of quietly taking control over an infected system’s video camera and capture audio. This allows them to both see and hear anything going on in the vicinity of the system. Essentially then, InvisiMole turns your computer into a compromised Amazon Echo.

Based on the sophisticated design of the software and the fact that the researchers have yet to be able to trace it back to the source, it’s believed that it has been developed by (or at least in partnership with) an unknown state actor. Although the current campaign is small and highly targeted, given its capabilities, InvisiMole could easily become a much more serious threat.

Even worse, it’s entirely possible that the original developers could lose control of the code, or that some other hacker group could reverse engineer it, causing it to spread far and wide.

Research into the software is still ongoing, and at this point ESET can’t say with certainty how the malicious payload is being delivered to target machines. Of course, at present, there is no antivirus software defense against it. Stay on your guard. You never know who might be watching.

Joseph Martin

Attackers Targeting Job Seekers Via Listings And Recruitment

June 20, 2018 by Joseph Martin

Cyber-criminals around the world are increasingly focusing their attention on job seekers. According to the security firm Flashpoint, there has been a notable uptick in ploys involving phony job listings that attempt to get job seekers to give up personal information.

Perhaps the biggest surprise is the fact that this is only now becoming a growing threat. After all, from the cyber-criminal’s point of view, it’s low hanging fruit. Job seekers expect that they’ll be asked for all types of personal information when applying for positions, after all.

As long as the criminals take the time to make their offers appear legitimate, most applicants wouldn’t think twice about sending in their resume (complete with physical address and phone number), and then, a bit later in the process, their social security number and other personal and confidential information.

According to Flashpoint analyst David Shear, it’s not just personal information the criminals are after, however. Increasingly, criminals are seeking to engage the services of the people who “apply,” by using them as unwitting money mules, or using them as part of an intricate money laundering scheme.

On top of that, it’s all too easy for the criminal to respond to an applicant’s inquiry with an email containing an attachment (usually a poisoned PDF). Again, since the applicant thinks he (or she) has replied to a legitimate offer for employment, odds are excellent that they’ll open the attachment without hesitation.

At that point, whatever payload the poisoned file contained is installed onto their computer, which can have devastating consequences, depending on the nature of the malware the criminals want to install.

Shear also notes that he and his team have seen an increase in the number of inquiries on the Dark Web asking after compromised business accounts, and offers this explanation as to why: “Attackers want access to business accounts in order to leverage their phony job listings and recruit people who would ultimately participate in fraud without their knowledge.”

All that to say, job seekers beware. It seems that no low is too low where these criminals are concerned.

Joseph Martin

« Previous Page
1
…
5
6
7
8
9
…
22
Next Page »

Watch Out For Rise In Microsoft Office Attacks

Vulnerability In Mac OS Went Unnoticed For Years

Turn Cortana Off At Lock Screen To Avoid Potential Hack

New Trick Lets Hackers Bypass Office 365 Email Security

Majority Of Web Apps Found To Have Security Vulnerabilities

Google Cracking Down On 3rd Party Browser Extension Installs

Another Vulnerability Found In Intel CPU’s

New InvisiMole Malware Turns Your System Into A Video Camera

Attackers Targeting Job Seekers Via Listings And Recruitment

Contact Info

Navigation