Security

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.

Does Your Company Need An Internet Usage Policy?

July 27, 2015

Scott Blake is a Senior Network Engineer with Tech Experts.

With the growth and expansion of the Internet, it is important to make sure that your business has a policy in place to protect its assets.

Depending on your business, an Internet Usage Policy (IUP) can be long and drawn out or short and to the point.

An IUP will provide your employees with guidelines on what is acceptable use of the Internet and company network. IUPs not only protect the company, but also the employee.

Employees are informed and aware of what is acceptable when it comes to websites and downloading files or programs from the Internet.

When employees know there will be serious consequences for breaking the IUP, such as suspension or termination of employment, companies tend to notice a decrease in security risks due to employee carelessness.

You will need to make sure your IUP covers not only company equipment and your network, but also employee-owned devices such as smart phones and tablets. You may be surprised at the number of employees that feel they do not have to follow the IUP because they are using their own device to surf or download from the Internet.

Make sure you address proper usage of company-owned mobile devices. Your business may have satellite employees or a traveling sales force. Even when they are away, they need to be aware they are still representatives of the business and must follow the business IUP.

After all, it would not go over well if your sales staff was giving a presentation to a prospective client and suddenly, “adult content” ads popped-up on the screen because one of your employees was careless in their web habits.

The downloading of files and programs is a security risk in itself. Private, internal company documents and correspondence downloaded from your company’s network can become public, causing unrepairable damage.

On the same thought, employees downloading from the Internet open your company’s network up to malware attacks and infections.

There are a lot of hackers that prey upon the absent-minded employee downloading a video or song file by hiding a piece of malware within the download. Once the malware makes it into your network, there’s no telling what damage it can cause.

As for non-work related use of the company network and Internet, make sure your employees know there is no expectation of personal privacy when using the company’s network and Internet connection.

Make it well-known that the network and Internet are in place to be used for work purposes only. Improper use of the network can reduce bandwidth throughout the company network.

This includes all mobile devices owned by the company. This way, your employees know that no matter where they are they still must follow the guidelines of the IUP.

Make sure all of your employees sign the IUP and fully understand what it is they are signing. Make sure you answer any and all questions they may have.

This will help clear up any confusion your employees may have. This way, there can be no excuses as to why the IUP was broken.

Whenever you update the IUP, make sure you have all of your employees sign and understand the new additions and/or changes to the IUP. It may seem like overkill, but you’ll be glad you did if you ever run into any violations of your company’s IUP.

For assistance in creating Internet Usage Policies or if you have any questions, call the experts at Tech Experts: (734) 457-5000.

Top Seven Network Attack Types So Far In 2015

June 30, 2015

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

There’s no doubt that small businesses are under attack from hackers and cyber-criminals. Typically, small companies have less secure networks and looser security standards, making them easy targets.

The latest Threat Report from McAfee Labs details the types of attacks against small businesses. The chart shows the most common network attacks detected in Q1 2015.

Denial of service attacks – 37%
A denial of service (DOS) attack attempts to make a resource, such as a web server, unavailable to users. These attacks are very common, accounting for more than one-third of all network attacks reviewed in the report.

A common approach is to overload the resource with illegitimate requests for service. The resource cannot process the flood of requests and either slows or crashes. [Read more…] about Top Seven Network Attack Types So Far In 2015

Data Breaches And The Building Blocks Of Cyber Security

May 27, 2015

The data breaches at Target, Home Depot, Staples, Michaels, Anthem, and Sony Pictures Entertainment are just the tip of the iceberg and the stakes are very high. They’re costly for both businesses and customers and once the breach is announced, customers often terminate their relationship with that business.

You may ask, “What constitutes a data breach?” It is an event in which an individual’s information, including name, Social Security number, medical record and/or financial record or debit card is potentially put at risk. This can be in either electronic or paper format. The data set forth in this article is based on Ponemon Institute’s “2014 Cost of Data Breach Study.” Ponemon conducts independent research on privacy, data protection and information security policy.

New methodologies developed by the National Institute of Standards and Technology (NIST) and other industry standards bodies, such as the Department of Health and Human Services (HHS), are being implemented by many organizations, but best practices for addressing cyber security threats remain vague.

So what can be done to minimize cyber security threats? An effective starting point is to focus on the following essential building blocks of any cyber threat defense strategy.

Most organizations rely on tools like vulnerability management and fraud and data loss prevention to gather security data. This creates an endless and complex high-volume stream of data feeds that must be analyzed and prioritized. Unfortunately, relying on manual processes to comb through these logs is one of the main reasons that critical issues are not being addressed in a timely fashion.

Implementing continuous monitoring, as recommended by NIST Special Publication 800-137, only adds to the security problem as a higher frequency of scans and reporting exponentially increases the data volume. Data risk management software can assist organizations in combining the different data sources, leading to reduced costs by merging solutions, streamlining processes, and creating situational awareness to expose exploits and threats in a timely manner.

One of the most efficient ways to identify impending threats to an organization is to create a visual representation of its IT architecture and associated risks.

This approach provides security operations teams with interactive views of the relationships between systems and their components, systems and other systems, and components and other components. It enables security practitioners to rapidly distinguish the criticality of risks to the affected systems and components. This allows organizations to focus mitigation actions on the most sensitive, at-risk business components.

Effective prioritization of vulnerabilities and incidents is essential to staying ahead of attackers. Information security decision-making should be based on prioritized information derived from the security monitoring logs. To achieve this, security data needs to be correlated with its risk to the organization. Without a risk-based approach to security, organizations can waste valuable IT resources mitigating vulnerabilities that, in reality, pose little or no threat to the business.

Lastly, closed-loop, risk-based remediation uses a continuous review of assets, people, processes, potential risks, and possible threats. Organizations can dramatically increase operational efficiency. This enables security efforts to be measured and made tangible (e.g., time to resolution, investment into security operations personnel, purchases of additional security tools).

By focusing on these four cyber security building blocks, organizations can not only fulfill their requirements for measurable risk reporting that spans all business operations, but also serve their business units’ need to neutralize the impact of cyber-attacks.

These methodologies can also help improve time-to-remediation and increase visibility of risks.

Security Tips To Keep Your Mobile Phone Secure

May 27, 2015

We’ve all seen the stories about celebrities getting their mobile phones hacked and having their private photos splattered all over the web.

Although you may think there is nothing of real interest on your phone, you are still at risk of security invasion. Any number of people could have motive to do so from exes to a colleague who perceives you as a threat, and even innocuous content on your phone can be taken out of context to reflect negatively on you in general.

Use some of these simple tips to protect your mobile phone and reputation:

Passwords
Your passwords are your primary defense against would-be hackers – from your lock code to email account password. Don’t share your passwords with others. Also, make sure your passwords aren’t easily guessed, such as your pet’s name or child’s birthday.

A secure password may not be as easily remembered, but it is far harder to hack. Finally, shield your phone’s screen when entering passwords in public lest onlookers take note of which buttons you push.

Clear Out the Cobwebs
In addition to creating more storage space on your mobile phone, it is just wise to remove old text conversations, photos, and other data periodically.

Back up the things you want to keep onto other devices, so you can access them later. With all of the excess stuff you don’t use on a regular basis gone, you leave less for hackers to work with if the security of your mobile phone is breached. In the event of being hacked, you would also likely lose all of those things, so backing such info up protects you twofold.

Beef Up Security
Take advantage of the lesser-known security features of your mobile phone. For example, turn off the Discoverable mode on your Bluetooth.

Look on your phone under Security to see if there are already included options, such as an automatic lock screen that activates after a certain period of inactivity.

There are also applications you can download to increase the level of security on your phone, including apps that allow you to access and control your phone remotely in the case of loss or theft.

Major Microsoft Windows Vulnerability Discovered

May 27, 2015

Microsoft recently released details about the newest vulnerability (MS15-034) in the Windows HTTP stack’s armor. With other recent problems in Microsoft patches, the problem may have been downplayed a bit to save face. This vulnerability, however, is more serious than it initially seemed.

The MS15-034 vulnerability is widespread. Although Windows servers are most at risk, this problem affects most products that run Windows. The chink in question lies in the HTTP.sys component, which is a kernel-mode device driver that processes HTTP requests quickly.

This component has been an integral part of Windows since 2003 and is present in all versions up to Windows 8.1. This means that any device running Windows without up-to-date patches is at risk.

It isn’t difficult to exploit this vulnerability. The only thing Microsoft is divulging about how MS15-034 can be used to compromise devices is that it requires “a specially crafted HTTP request.” It seems that this information is deliberately vague.

All one has to do is send an HTTP request with a modified range header, and access to data is granted, although sometimes limited. A similar attack was documented in 2011 on the Apache HTTPD Web server that was later patched.

There is good news though. As in other areas of life, prevention is far more effective than trying to deal with a problem’s aftermath. It isn’t difficult to protect your devices from the MS15-034 vulnerability.

The first step is to ensure that your server has the latest updates that include the patch to fix the problem.

If your server hosts a publicly accessible application, you can verify your server’s vulnerability by going to https://lab.xpaw.me/MS15-034, enter your server’s URL, and press the Check button for an instant report on your site.

If you then see the report that the website has been patched, you’re safe; otherwise, that particular system will need to be patched.

HIPAA Email Encryption Requirements

April 30, 2015

Question: does the Security Rule allow for sending electronic patient health information (e-PHI) in an email or over the Internet?

Answer: the Security Rule allows for e-PHI to be sent over an electronic open network as long as it is adequately protected. The HIPAA Security Rule does not expressly prohibit the use of email for sending e-PHI.

However, the standards for access control, integrity, and transmission security require covered entities, such as insurance providers or healthcare providers, to implement policies and procedures.

These policies and procedures restrict access to, protect the integrity of, and guard against unauthorized access to e-PHI.

The standard for transmission security also includes addressable specifications for integrity controls and encryption.

By default, whenever you send or receive email, you must connect through the Internet to an email service provider or email server.

The reality is that most email service providers do not use any security at all. This means everything you send to or receive from your email service provider is unsecure, including your user name, password, email message, attachments, who you are sending to, and who you are receiving from.

It gets worse! Most email service providers connect to other email service providers without any encryption.
If the other party is not using a secure email service, their emails can also be compromised. So the email you send and receive through the Internet is wide open, unsecure, and can be intercepted and stolen by thieves.

This is one of the main causes for identity theft, spam, and PHI breaches.

According to the U.S. Department of Health & Human Services (HHS), “…a covered entity must implement an addressable implementation specification if it is reasonable and appropriate to do so, and must implement an equivalent alternative if the addressable implementation specification is unreasonable and inappropriate, and there is a reasonable and appropriate alternative.”

This basically states that encryption is required. If you choose not to encrypt your data, you must document, in writing, a reasonable explanation why you chose not to do so.

In the event of an audit, the Office for Civil Rights (OCR) will review your documentation and determine whether or not they agree with you. You’re required to encrypt PHI in motion and at rest whenever it is “reasonable and appropriate” to do so.

I’ll bet that if you do a proper risk analysis, you’ll find very few scenarios where it’s not. Even if you think you’ve found one, and then you’re beached, you have to convince the OCR, who think encryption is both necessary and easy, that you’re correct.

I have convinced myself and others that encryption is required by HIPAA.

Better safe than sorry, after all.

Top Signs Your Computer May be Infected

April 30, 2015

Ranging from minor spyware and adware to complete system lock-outs courtesy of ransomware, infections have become a standard in today’s high-speed electronic age.

Even when using the latest state of the art detection software, the most modern systems are prone to infection.

Some basic low-level forms of adware and spyware are add-ons called toolbars. A toolbar is an add-on to a web browser, putting another bar at the top of your browser window below the address bar.

They can come in several different forms and functions. Some are helpful and pose no threat to your system. Others serve as a reporting tool for the toolbar’s designer.

They can collect data on surfing habits such as websites visited and search topics used. This data is then transmitted back to the designer and sold off to advertisers who, in turn, use the information to start spamming you with their client’s websites and ads.

Building off of the spam generated from the data collected from the adware and spyware, you will start to see more and more pop-ups on webpages and possibly even on your desktop.

Sometimes, these pop-ups are harmless and very easy to remove, but more often, they are the beginning stages of an invasion of malicious programs.

The pop-ups use false and misleading information to scare the user into believing they are already infected and they need to download “their” software to clean the infections.

What ends up happening is that you think you are downloading one program to clean your system, but you are really downloading and installing additional programs in the background.

I have seen instances where one so-called program install downloaded nine additional programs in the background. None of the additional programs had anything to do with “cleaning” or “speeding” up your system. They just wreak havoc on your operating system.

Through these malicious programs, more dangerous infections can occur. High-risk level malware, trojans, and viruses become residents on your system.

From this point forward, you will start to experience extreme slowness or even a complete inability to browse the Internet. You will start to see an increase in spam email and email messages containing attachments or web links to strange web addresses.

The attachments are what you need to be very cautious about. A very high-risk level malware called Crypto is primarily transmitted through these infected attachments. Once infected, the Malware spreads though your system, encrypting all of your data.

After that, there is little hope of recovering any of your data.

Viruses, malware, trojans and malicious programs are lurking on the web at every turn.

The most important thing to remember is “knowledge is power.” Don’t fall victim to the overwhelming number of companies advertising that their products can and will clean your computer of these nasty bugs and speed up the performance of your computer at the same time.

The truth is that the vast majority of these companies will install a ton of “freeware” programs on your system that will bog down your CPU and eat up your memory resources.

Once these programs are installed, get ready for Pop-Up City. It turns into a giant game of Whack-A-Mole just trying to close all the windows and pop-ups generated by these programs.

Several of these programs will also inject a proxy server into your Internet settings. This will severely limit your Internet browsing and even redirect you to predefined webpages in an attempt to lure you into purchasing additional programs to remove the programs you already installed.

For additional information or if you think you may have a virus or spyware infection, contact Tech Experts at (734) 457-5000.

Is Someone Using Your WiFi? Here’s How To Find Out

April 30, 2015

There’s no doubt about the convenience of using wireless in your home or office. However, you don’t want just anybody hopping on your WiFi, using your network, and breaching its security. Having a unique password doesn’t mean you are immune to this problem.

If you ever notice that your connection is much slower than usual, it’s worth taking a peek at just how many devices are connected to your wireless network.

You can download and install a program aptly called “Who Is on Your WiFi” to know if there are other people connected to your hot spot who should not be. The free version is sufficient to detect intruders, but there are also paid versions with extra features like text notifications, audit logs, etc.

Once you install the application, all you have to do is follow the tutorial to run a scan of your network and review information about devices that are linked to your connection.

Initially, you may not recognize which MAC and IP addresses correspond with which device, but there’s an easy way to identify them. Turn off all of your devices, then turn them on one by one. If you only have one known device connected to your WiFi, and the “Who Is on Your WiFi” application is showing more than that device, it’s a safe bet someone is sharing your Internet connection. Take the appropriate measure of immediately changing your wireless password and only share it with family or designated individuals you want to have it.

For future scans, you can label each of your devices as something easily recognizable, such as My Phone or Dad’s Laptop, to facilitate the identification of intruders.

Online Safety: Is Your Website Secure?

March 26, 2015

For all too many companies, it’s not until after a breach has occurred that web security becomes a priority.

While more than a few examples of recent breaches may leap to mind, know that these aren’t exclusive to big name retailers who accept credit cards. If you have a website for your business, you may be at risk.

As more and more business is done using the World Wide Web, websites themselves have become increasingly attractive to cybercriminals.

Websites are such a lucrative target for an attack because not only are there so many sites to attack, but an overwhelming majority of all websites can be easily exploited by some of the most common vulnerabilities.

Attackers, no longer driven by notoriety and ideology, have focused more on techniques that allow them to profit from their illegal activities.

Exploited sites allow the theft of credit card data, financial information, identities, intellectual property, and anything else cyber criminals can get their hands on.

The integrity of the company’s internal network can be affected as well if the website provides access to it.

There are many online services that allow anyone to create a webpage in under ten minutes.

Unfortunately, these quick solutions also make it easier for attackers. Without proper training and knowledge, many of these sites are left with multiple vulnerabilities. A few of these vulnerabilities will be discussed.

The Heartbleed Bug is a vulnerability that allows attackers to obtain confidential data such as usernames, passwords, emails, and even proprietary company data and communications.

Even if you think you might be protected because you use encrypted forms of communication, you’re not safe. Attackers will be able to eavesdrop into your communications and steal data from beneath you.

Like Heartbleed, one of the most prominent vulnerabilities affecting web applications is cross site scripting (XSS).

This vulnerability can allow an attacker to hijack web communications. The attacker may target a vulnerable website by tricking the user into submitting sensitive information or performing a privileged action within the target website’s web controls.

Application Denial of Service attacks have rapidly become a commonplace threat for doing business on the Internet — more proof that Web application security is now more critical than ever. Denial of Service attacks can result in significant loss of service, money and reputation for organizations.

Typically, the loss of service is the inability of a particular network service, such as e-mail, to be available or the temporary loss of all network connectivity and services.

Denial of Service attacks are centered on the concept that by overloading a target’s resources, the system will ultimately crash.

An HTTP Denial of Service attack can also destroy programming and files in affected computer systems.

In some cases, HTTP DoS attacks have forced Web sites accessed by millions of people to temporarily cease operation.

Websites that can be compromised pose a serious risk and thus serious preventative measures should be taken to combat it.

Scrambling to fix the problem after the fact is costly, stressful, and can potentially result in legal action. Breaches also cause damage to your company’s image and brand, which may be permanent.

Know your vulnerabilities and don’t rely on ten-minute-or-less website creators to keep you safe.

If it’s too good to be true, it probably is.

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