Malware

Watch Out! “Malvertising” Is On The Rise!

December 17, 2024

This image was generated by an AI engine.

There are many types of malware. One of the most common is called “malvertising.” It crops up everywhere. You can also see these malicious ads on Google searches.

Two things are making malvertising even more dangerous. One is that hackers use AI to make it very believable. The other is that it’s on the rise, according to Malwarebytes. In the fall of 2023, malvertising increased by 42% month over month.

Below, we’ll help you understand malvertising and give you tips on identifying and avoiding it.

What is “malvertising?”

Malvertising is the use of online ads for malicious activities. One example is when the PlayStation 5 was first released. It was very hard to get, which created the perfect environment for hackers. Several malicious ads cropped up on Google searches. The ads made it look like someone was going to an official site. Instead, they went to copycat sites. Criminals design these sites to steal user credentials and credit card details.

Google attempts to police its ads, but hackers can have their ads running for hours or days before they’re caught. These ads appear just as any other sponsored search ad. They can also appear on well-known sites that have been hacked or on social media feeds.

Tips for protecting yourself from malicious online ads

Review URLs carefully

You might see a slight misspelling in an online ad’s URL. Just like phishing, malvertising often relies on copycat websites. Carefully review any links in the ads.

Visit websites directly

A foolproof way to protect yourself is not to click any ads.

Instead, go to the brand’s website directly.

If they truly are having a “big sale,” you should see it there. Just don’t click those links and go to the source directly.

Use a DNS filter

A DNS filter protects you from mistaken clicks. It will redirect your browser to a warning page if it detects danger. DNS filters look for warning signs. This can keep you safe even if you accidentally click a malvertising link. Often, you’ll see a block page.

Do not log in after clicking an ad

Malvertising will often land you on a copycat site. The login page may look identical to the real thing. One of the things phishers are trying to steal is login credentials.

If you click an ad, do not input your login credentials on the site, even if the site looks legitimate. Go to the brand’s site in a different browser tab.

Don’t call suspicious ad phone numbers

Phishing can also happen offline. Some malicious ads include phone numbers to call. Unsuspecting victims may not realize fake representatives are part of these scams. Seniors are often targeted; they call and reveal personal information to the person on the other end of the line.
Stay away from these ads. If you find yourself on a call, do not reveal any personal data.

Don’t download directly from ads

“Get a free copy of MS Word” or “Get a Free PC Cleaner.” These are common malvertising scams. They try to entice you into clicking a download link. It’s often for a popular program or freebie. The link actually injects your system with malware to do further damage.

A direct download link is likely a scam. Only download from websites you trust.

Warn others when you see malvertising

If you see a suspicious ad, warn others. This helps keep your colleagues, friends, and family more secure. If unsure, do a Google search. You’ll often run across scam alerts confirming your suspicion.

Foster a culture of cyber awareness

It’s important to arm yourself and others with this kind of knowledge. Foster a culture of cyber-awareness to ensure safety and better online security.

Zero-Click Malware Is The Latest Cyber Threat

August 17, 2023

In today’s digital landscape, cybersecurity threats continue to evolve. They pose significant risks to individuals and organizations alike.

One such threat gaining prominence is zero-click malware. This insidious form of malware requires no user interaction. It can silently compromise devices and networks.

One example of this type of attack happened due to a missed call. That’s right, the victim didn’t even have to answer. This infamous WhatsApp breach occurred in 2019, and a zero-day exploit enabled it. The missed call triggered a spyware injection into a resource in the device’s software.

A more recent threat is a new zero-click hack targeting iOS users. This attack initiates when the user receives a message via iMessage. They don’t even need to interact with the message of the malicious code to execute. That code allows a total device takeover.

Understanding zero-click malware

Zero-click malware refers to malicious software that can do a specific thing. It can exploit vulnerabilities in an app or system with no interaction from the user. It is unlike traditional malware that requires users to click on a link or download a file.

The dangers of zero-click malware

Zero-click malware presents a significant threat. This is due to its stealthy nature and ability to bypass security measures. Once it infects a device, it can execute a range of malicious activities including:
• Data theft
• Remote control
• Cryptocurrency mining
• Spyware
• Ransomware
• Turning devices into botnets for launching attacks

This type of malware can affect individuals, businesses, and even critical infrastructure. Attacks can lead to financial losses, data breaches, and reputational damage.

Fighting zero-click malware

To protect against zero-click malware, it is crucial to adopt two things. A proactive and multilayered approach to cybersecurity. Here are some essential strategies to consider:

Keep software up to date

Regularly update software, including operating systems, applications, and security patches. This is vital in preventing zero-click malware attacks. Software updates often contain bug fixes and security enhancements.

Put in place robust endpoint protection

Deploying comprehensive endpoint protection solutions can help detect and block zero-click malware. Use advanced antivirus software, firewalls, and intrusion detection systems.

Use network segmentation

Segment networks into distinct zones. Base these on user roles, device types, or sensitivity levels. This adds an extra layer of protection against zero-click malware.

Educate users

Human error remains a significant factor in successful malware attacks. Educate users about the risks of zero-click malware and promote good cybersecurity practices. This is crucial.

Encourage strong password management. As well as caution when opening email attachments or clicking on unfamiliar links.

Use behavioral analytics and AI

Leverage advanced technologies like behavioral analytics and artificial intelligence. These can help identify anomalous activities that may indicate zero-click malware.

Conduct regular vulnerability assessments

Perform routine vulnerability assessments and penetration testing. This can help identify weaknesses in systems and applications.

Uninstall unneeded applications

The more applications on a device, the more vulnerabilities it has. Many users download apps then rarely use them. Yet they remain on their device, vulnerable to an attack.

Only download apps from official app stores

Be careful where you download apps. You should only download from official app stores. And always keep your apps updated using your device’s app store application.

Signs That Your Computer May Be Infected With Malware

July 27, 2022

Approximately 34% of businesses take a week or longer to regain access to their data and systems once hit with a malware attack.

Malware is an umbrella term that encompasses many different types of malicious code. It can include viruses, ransomware, spyware, trojans, adware, key loggers, and more.

The longer that malware sits on your system unchecked, the more damage it can do. Most forms of malware have a directive built in to spread to as many systems as possible. So, if not caught and removed right away, one computer could end up infecting 10 more on the same network in no time.

Early detection is key so you can disconnect an infected device from your network and have it properly cleaned by a professional.

Keep an eye out for these key warning signs of malware infection so you can jump into action and reduce your risk.

Strange pop-ups on your desktop

Some forms of malware can take on the disguise of being an antivirus app or warranty notice that pops up on your screen.

Hackers try to mimic things that users may have seen from a legitimate program, so they’ll be more apt to click without thinking.

If you begin to see a strange “renew your antivirus” subscription alert or a warranty renewal that doesn’t quite make sense, these could be signs that your PC has been infected with adware or another type of malware.

New sluggish behavior

Computers can become sluggish for a number of reasons, including having too many browser tabs open at once or running a memory-intensive program. But you’ll typically know your computer and the types of things that slow it down.

If you notice new sluggish behavior that is out of the ordinary, this could be an infection. One example would be if you don’t have any programs open except notepad or another simple app, and yet you experience freezing.

When malware is running in the background, it can often eat up system resources and cause your system to get sluggish.

Applications start crashing

Applications should not just crash out of the blue. There is always a reason. Either the software is faulty, there’s been an issue with an update, or something else may be messing with that application’s files.

If you suddenly experience apps crashing, requiring you to restart the app or reboot your system, this is another telltale sign that a virus, trojan, or other malicious code has been introduced.

Your browser home page changes

If you open your browser and land on a homepage that is not the one you normally see, have your PC scanned for malware right away. Redirecting a home page is a common ploy of certain types of malware.

The malware will infect your system and change the system setting for your default browser home page. This may lead you to a site filled with popup ads or to another type of phishing site.

Just trying to change your homepage back in your settings won’t fix the situation. It’s important to have the malware removed as soon as you suspect something is wrong..

Sudden reboots

Another annoying trait of certain types of malicious code is to make your system reboot without warning.

This can cause you to lose the work you’ve just done and can make it difficult to get anything done. This may happen when malware is changing core system files behind the scenes.

With files corrupted, your system becomes unstable and can often reboot unexpectedly.

Missing hard drive space

If you find that a good deal of your hard drive space that used to be open is now gone, it could be a malware infection taking up your space. Some types of malware may make copies of files or introduce new files into your system.

They will cleverly hide, so don’t expect to see the word “malware” on a file search. Instead, the dangerous activities will usually be masked by a generic-sounding name that you mistake for a normal system file.

You run across corrupted files

If you open a file and find it corrupted, this could be a red flag that ransomware or another form of malware has infected your system.

While files can occasionally become corrupt for other reasons, this is a serious issue that deserves a thorough malware scan if you see it.

Get expert malware scanning and removal

Free online malware and virus scans aren’t very reliable. Instead, come to a professional like Tech Experts that can ensure your entire system is cleaned properly.

Malware Is Becoming Harder To Spot

June 27, 2022

According to new research, four in five malware attacks delivered by encrypted connections evade detection. And since two-thirds of malware is now arriving this way, it has the potential to be a big problem for your business.

This type of threat has already hit record levels and continues to grow. So, if you don’t yet have a response and recovery plan in place, now’s the time to create one.

It sits alongside your cyber security software protection and regular staff training. The plan details what you do in the event of a cyber-attack.

Having the right plan in place means all your people will know how to sound the alarm if something is wrong. It ensures downtime and damage are kept to an absolute minimum.

The faster you respond to an attack, the less data you should lose, the less it should cost you to put things right, and the faster you get back to work. Of course, you should also follow the usual security guidelines of making sure that updates and patches are installed immediately, and regularly checking your backup is working and verified.

Businesses that don’t place a high importance on their own cyber security planning are the ones hit hardest by such an attack.

Can we help you create your response and recovery plan? Call us.

Wiperware: New Malware That Shouldn’t Be Taken Lightly

October 12, 2017

Thomas Fox is president of Tech Experts, southeast Michigan’s leading small business computer support company.

Any business can be a target for hackers who use ransomware. However, in recent months, a major new threat has emerged. The recent Petya attack was initially perceived to be another form of ransomware.

However, as the firms involved took stock in the aftermath of the events, it became apparent that the attack took the form of “wipeware,” code that is designed to completely destroy the files stored on any system.

What is wiperware?

Wiperware is designed with one goal in mind: total destruction. The malware asks users to install a software update and then it immediately takes control of the device. Once it has gained admin access, it completely overwrites all files on the device and in some cases the entire network. Any attached storage is also vulnerable, included USB external drives, memory sticks and network shared drives.

While the motivations behind Petya remain unknown, what is abundantly clear is that wiperware is a threat that needs to be taken very seriously. Here are a couple of things you can do right now. [Read more…] about Wiperware: New Malware That Shouldn’t Be Taken Lightly

Five Tips For Staying Ahead Of Malware

October 25, 2016

Malicious software has become an everyday issue for many computer users, and it can have serious implications for your finances. To keep your information, data, and finances safe, you need to be aware of the common threats to your online security that exist and how you can protect yourself against fraudulent activity.

According to research from Kaspersky Security, malicious software, which is also commonly referred to as malware, impacted as many as 34.2% of computer users in 2015. But what is malware and how does it work?

Malware is somewhat different than computer viruses because instead of completely stopping your computer from operating, it sits quietly in your system stealing important and sensitive information.

It is estimated that over 1 million new forms of malware are released on a daily basis in the form of spyware, Trojan horses, phishing links, and ransomware. [Read more…] about Five Tips For Staying Ahead Of Malware

Yes, You Can Still Get Infected – Even With Anti-Virus

January 15, 2016

Scott Blake is a Senior Network Engineer with Tech Experts.

With the sudden release of a new variants of malware and ransomware such as CryptoWall, users are wondering why their anti-virus programs are not blocking the ransomware infection from infecting their computer.

As with many other forms of malware, the infection needs to exist before a cure or way to detect the threat can be created. This takes time and during this period of R&D, the malware spreads like wildfire.

While there are several forms and classifications of infections, there are basically only two different methods in which infections are released into your system: User Initiated and Self Extraction.

User Initiated infections are caused by a user clicking on a link within a webpage or email or by opening infected email attachment. Once opened, the malware is released and quickly spreads throughout your system.

Because the user manually clicked on or opened the link/document, most anti-virus programs receive this as an authorized override by the user and either internally whitelists the link/document or skips the scan.

CryptoWall is spread through this method, usually contained within an infected Word, Excel or PDF document. The creators of these programs take advantage of the programming of the document to hide the infection.

With the world becoming a paperless society, we are becoming more and more accepting of receiving and opening attachments sent to us through email. It has practically become second nature to just click and open anything we receive, regardless of any warning.

Self-Extracting infections are exactly what they’re named. These infections require no outside assistance to worm their way through your system, infecting as they go.

The number one method creators of this form use to place their software on your system is through “piggy back” downloads.

Piggy back downloads occur when you authorize the download and install of one program and other programs (related or unrelated to the original program) are automatically downloaded and installed with it. The most common way is by downloading programs promising to speed up your computer.

Infections can also exist on your system and lay dormant for long periods of time, waiting for the computer to reach a certain calendar day or time. These infections are called “time bomb” infections. Just like piggy back infections, they require no outside assistance to infect your system.

They are mostly found buried in the registry of the system or deep within the system folders. Because they are not active on the time of placement, most anti-virus programs will not detect them. Active reporting through toolbars is another means of becoming infected over time.

When a user downloads and installs a toolbar for their browser, they authorize at the time of install that it is okay to install and all of its actions are safe. However, most toolbars are actively scanning, recording, and reporting back to the creator. They also act have conduits for installations of other unwanted programs behind the scene.

If left unchecked, those additional programs can become gateways for hackers to gain access to your system and spread even more infections.

To help stop the spread of malware/ransomware such as CryptoWall and its variants, we need to become more vigilant in our actions when either surfing the Internet or opening email and attachments.

The best rule of thumb to follow for email is: if you don’t know the sender, or you didn’t ask for the attachment, delete it. As for websites, read carefully before you download anything and avoid adding toolbars.

Internet Security: Beware Of “Malvertising”

July 27, 2015

Michael Menor is Vice President of Support Services for Tech Experts.

As if Internet use wasn’t already troubled with cyber perils, users now have to add “malvertising” to the list of things from which they need to protect themselves.

“Malvertising,” like the name suggests, means “ads that contain malware.” Some mal-ads aren’t dangerous unless you click on them – but others can do “drive-by downloads,” sneaking their malware onto your computer simply because you’re viewing the page on which the ad appears.

While most malvertising is on websites, it can also show up on other ad-displaying apps, such as Facebook, Skype, some email programs, and many games.

The reason that malvertising is more of a problem than other malware approaches is that it can be spread through online advertising delivery networks like Google DoubleClick to legitimate sites that users routinely visit, like the New York Times, Huffington Post, and Yahoo, as well as routinely-used mobile apps that show ads. Malware-bearing ads can be “injected” either by hacking ads at the provider end or by buying and providing mal-ads. In most cases, there’s no way for a user to tell just by looking that an ad has been compromised.

The Potential Damage
The dangers of advertising-delivered malware are the same as those from malware you get any other way. Malware can steal account usernames and passwords, bank and credit card information, and other sensitive data.

It can encrypt your data and “hold it for ransom.” It can, in turn, infect other computers on your network and turn your computer into a “zombie,” spewing out spam and malware to the Internet.

Like other viruses and malware, malvertisements take advantage of security vulnerabilities on users’ computers and mobile devices. These may be anywhere from the operating system, to web browsers and other applications, to add-ons and extensions like Java, JavaScript, and Flash.

How do you know if your computer has been infected by malware? One sign is that your web browser shows unexpected pop-ups or seems to be running slower. But many malware infections remain “stealthy,” possibly even eluding anti-malware scans.

Legitimate ad creators and ad delivery networks are working on ways to detect and prevent malware from getting into the digital ads they serve. Otherwise, people have even more reason to not look at ads or block ads entirely.

But, assuming it can be done, this won’t happen for a year or more. The burden is on companies and individuals to do their best to protect their networks, computers, and devices.

What Can Companies and Users Do?
Although malvertising is a relatively new vector, the best security practices still apply; if you’re already doing things right, keep doing them. But what does “doing things right” look like?

Avoid clicking on those ads, even accidentally.
Maintain strong network security measures. Next generation firewalls at the gateway can often detect malware payloads delivered by ads, block the ads entirely, and/or detect communication from already-infected devices.
Regularly backup systems and critical files so you can quickly restore to a pre-infected state if your systems and data are compromised.
Deploy endpoint security software on every device so that it’s protected on and off the network.
Ensure that all operating systems and client software (especially web browsers) are fully patched and up to date.
If you suspect a computer has been infected, stop using it for sensitive activities until it’s been “disinfected.” Again, many security appliances can help you identify and quarantine infected devices.

It’s unfortunate that even more of everyday Internet use is potentially unsafe, but the steps to fend off malvertising are essentially security precautions that companies and individuals should already be following.

Tips To Protect Your Business PC From Malware

October 31, 2014

In today’s online world, technology users are essentially in a state of near-constant attack. Almost every day, there’s a new data breach in the news involving a well-known company and, quite often, fresh rules for protecting personal information are circulated.

Because of malware in email, phishing messages, and malicious websites with URLs that are one letter different from popular sites, employees need to maintain a high level of awareness and diligence to protect themselves and their organizations.

Phishing activities are especially pervasive, including attempts to steal users’ credentials or get them to install malicious software on their system. The astonishing success rate of phishing attacks makes them a favorite.

Why? More than 70% of people will follow the link to a phony website and, of those that followed the link, 30%-50% will routinely give up their usernames and passwords.

Many like to think of the network perimeter with all its firewalls and other fancy technologies as the front line in the cyber war, but the truth is there’s a whole other front.

Every single member of a company’s staff who uses email or the Internet is also on the front line and these people are generally considered a softer target than hardware or software. It’s simple: if the bad guys can get an employee to give up his or her user credentials or download some malware, they can likely waltz right past the technological controls, basically appearing as if they belong there.

When using a computer for personal functions, a user generally has to have the ability to install software and modify the system configurations. Typically, such administrative functions are not available to all users in a corporate environment.

As a result, even if an organization has made an effort to improve a system’s security, a user doing work on a personal computer has the ability to disable and circumvent protections and has the privileges to allow for the installation of malware.

As companies migrate toward a world of bring-your-own-device policies, some companies are developing strategies to help address these risks. But, as a rule, using a work computer for personal reasons or doing work on a personal computer (or tablet or smartphone) can significantly increase the threat level that an employer has to protect itself against.

To help their organization protect systems and data, employees need to implement some smart web browsing habits. Smart web browsing means engaging in the following activities:

Beware of downloads
Malware can be hidden, not just in applications or installation programs, but in what appear to be image and video files also. To limit the likelihood of downloading content that contains malware, only download from reputable sites. With sites that are not a household name, take the time to do a little research and see if other people have had issues.

Additionally, be sure that antivirus software is set up to automatically scan downloads. Or scan downloads manually, even when receiving them from name-brand sites, as it is not unheard of for infected files to make their way onto otherwise legitimate web sites.

This is especially true for file-sharing sites where the site owner cannot control every piece of content a user may place there.

Be wary of deceitful sites
Those running sites already breaking the law by illegally distributing copyrighted materials — like pirated music, movies or software — probably have no qualms about including malicious content in their downloads or stealing information.

Many popular web browsers today have built-in functionality that provides an alert when visiting a website that is known to be dangerous.

And if the browser doesn’t give a notice, the antivirus software may provide that function. Heed the alerts!

Employees need to protect their devices from online and in-person threats. Start by keeping the company’s system patched. Configure it to automatically apply updates or issue notifications when there are updates and then apply them as soon as possible. This doesn’t just apply to the operating system.

Keep all installed applications updated; sometimes this takes a little extra work.

Remember, the challenge of security is that the bad guy needs to find only one hole in a security system to get past it, so fix them all. Think of it as putting dead bolts on doors, but leaving the basement window wide open.

To that end, security professionals like to debate the usefulness of today’s antivirus software. And it’s true that malware continues to become more sophisticated and harder to detect. But it always amazes me how old some of the malware running around is. As a result, use antivirus software and keep it up-to-date.

Also, use a software firewall, either the Windows firewall or one provided in an antivirus package. This is especially true for laptops connected to public wireless access points at hotels or coffee shops, but it also applies to home systems. It just provides that extra layer of defense.

And finally, please, don’t ever give passwords to anyone. Be vigilant and question anything new, especially emails and forms in the web browser that request work credentials, no matter how nicely the request is made.

(Image Source: iCLIPART)

Top Tips To Avoid A Virus Or Malware Infection

October 18, 2013

by Michael Menor, Network Technician
Malware is short for “malicious software.” It includes viruses and spyware that get installed on your computer, phone, or mobile device without your consent.

These programs can cause your device to crash and can be used to monitor and control your online activity. Criminals use malware to steal personal information, send spam, and commit fraud.

Avoid Malware
Scam artists try to trick people into clicking on links that will download malware and spyware to their computers, especially computers that don’t use adequate security software. To reduce your risk of downloading unwanted malware and spyware:

Keep your security software updated. At a minimum, your computer should have anti-virus and anti-spyware software, and a firewall. Set your security software, internet browser, and operating system (like Windows or Mac OS) to update automatically.

Don’t click on any links or open any attachments in emails unless you know who sent it and what it is. Clicking on links and attachments – even in emails that seem to be from friends or family – can install malware on your computer.

Download and install software only from websites you know and trust. Downloading free games, file-sharing programs, and customized toolbars may sound appealing, but free software can come with malware.

Minimize “drive-by” downloads. Make sure your browser security setting is high enough to detect unauthorized downloads. For Internet Explorer, for example, use the “medium” setting at a minimum.

Use a pop-up blocker and don’t click on any links within pop-ups. If you do, you may install malware on your PC. Close pop-up windows by clicking on the “X” in the upper right-hand corner of the title bar.

Resist buying software in response to unexpected pop-up messages or emails, especially ads that claim to have scanned your computer and detected malware. That’s a tactic scammers use to spread malware.

Talk about safe computing. Tell your kids that some online actions can put the computer at risk: clicking on pop-ups, downloading “free” games or programs, opening chain emails, or posting personal information.

Back up your data regularly. Whether its text files or photos that are important to you, back up any data that you’d want to keep in case your computer crashes.

Detect Malware

Monitor your computer for unusual behavior. Your computer may be infected with malware if it:

slows down, crashes, or displays repeated error messages
won’t shut down or restart
serves up a barrage of pop-ups
displays web pages you didn’t intend to visit, or sends emails you didn’t write

Other warning signs of malware include:

new and unexpected toolbars
new and unexpected icons in your shortcuts or on your desktop
a sudden or repeated change in your computer’s internet home page
a laptop battery that drains more quickly than it should

Get Rid of Malware
If you suspect there is malware on your computer, take these steps:

Stop shopping, banking, and doing other online activities that involve user names, passwords, or other sensitive information.
Update your security software, and then run it to scan your computer for viruses and spyware. Delete anything it identifies as a problem. You may have to restart your computer for the changes to take effect.

If your computer is covered by a warranty that offers free tech support, contact the manufacturer.
Before you call, write down the model and serial number of your computer, the name of any software you’ve installed, and a short description of the problem.

Tech Experts offers technical help on the phone, in our office, or in your home or business, based upon what is most convenient for you.

Telephone and online help generally are the least expensive and most time efficient, but you may have to do some of the work yourself. Bringing the computer to our office is usually less expensive than having a technician visit your business or home.

Once your computer is back up and running, think about how malware could have been downloaded to your machine, and what you could do differently to avoid it in the future.