What is spyware?
This article was updated on December 1, 2023.
Written by Michael Feder
Reviewed byKathryn Uhles, MIS, MSP,Dean, College of Business and IT
Once activated, spyware can cause damage to your device beyond identity theft. In some cases, spyware causes network disruptions or even damages your hardware.
The faster you identify spyware on your device, the faster you can remove it and prevent it from compromising your hardware and data.
Common examples of spyware
There are :
- Adware
- Tracking cookies
- Trojan spyware
- System monitors
Each type can create major problems for your network security. These problems might start small — your device may experience slower load times or . As it begins to take greater hold of your device, these problems will likely worsen.
Learning to recognize each type is one of the best ways to prevent malicious code from attacking your device. Diagnosing spyware can help remove malware infections and minimize damage.
Adware
Adware is a malicious advertising program thatautomatically displays advertisementsto users. Different types of adware work in different ways. For example, some adware only appears when you’re using a specific internet browser. In other cases, it might display ads as soon as you turn on your device.
Your device can download adware after opening a malicious message orvisiting an unsecured website. The adware begins to show ads, making revenue for the advertiser or the hacker. These ads are shown without the user’s consent and often require a security process to be deactivated.
Tracking cookies
Tracking cookies are specialized cookie files that can beshared across devices or networks. The files are often used for legitimate marketing purposes or by your device to remember trusted websites.
In some cases, however, these files are used maliciously totrack your browsing behavior without your consent. This occurs when files override your cookie or browser preferences and deliver your information to third parties without your knowledge or consent.
Many tracking cookies are small text files, which are more difficult for users to identify when looking for malware on their devices. These files cannot contain viruses, but hackers can use them totrack your internet activity. Hackers then use your information to access personal files or data.
Trojan spyware
Trojan spyware, commonly known as a Trojan horse, is spyware that appears to be harmless. Once activated, it unleashes a payload — a set of malicious codes — that cancompromise your deviceor your data in several ways.
Trojan spyware attempts to deceive a device user by looking like areputable downloadthat, once downloaded, clicked on and executed, releases the payload. It will often begin sifting through your personal information. This can include stored passwords, credit card data, images, text files and otheritems that could contain sensitive data.
Using your internet connection, it then delivers that information to a hacker. Hackers can also use Trojan horse spyware to download additional harmful programs to your device.
System monitors
System monitors are another type of spyware. These programstrack your actionswhile you use a device. Some systemmonitoring programstrack keystrokes, while others might monitor your email, browsing history or a list of the programs you use.
System monitoring programs are oftendisguised as freeware— software that is available for download online at no cost. The downloaded program soon begins to monitor a user’s activity and delivers results to hackers.
Spyware removal
After you’ve identified spyware on your device, it’s time to remove it. Removing spyware can take time, but it’s an important step in securing your device and the data stored on your hard drive.
Here are some of the major steps to remove spyware:
- Update your system’s software — Check your device’s security software to make sure you’re running the latest version.
- Enable two-factor authentication — Provide two different methods of personal authentication to verify your identity.
- Install an anti-spyware program — Download and run a trusted anti-spyware program to diagnose and remove any spyware.
- Remove suspicious files — Examine files and remove any unfamiliar or suspicious programs, icons or documents.
- Run manual scans — Regularly scan your device to manually check for different types of spyware.
After these steps, it’s important to check the status of your device. Perform a manual scan of your device using a trusted security program to ensure you’ve removed all traces of the spyware from your phone, tablet, computer or any other devices you use.
How to prevent spyware
Spyware represents a serious concern for many device users. Fortunately, people can reduce the risk of spyware infection and improve their overallnetwork security. For example, don’t click on a link in an email unless you know who sent it and you trust the link, and always check the email address of the sender (not just the name that may show up).These strategies can’t eliminate the risk of spyware, but they can help protect your devices and your internet connection from spyware that might be waiting.
Practice caution when consenting to cookies
Cookies are pieces of data stored on your web browser to identify your device whenever you visit a new website. While cookies sometimes make browsing more convenient, they can create vulnerability for spyware infection.
Whenever you visit a new website, it’s important to practice caution when consenting to cookies. Review the website’s cookies policy, which will outline the custom experience options available to users.
Update software diligently
Updating your device’s software can help further protect against spyware. For example, security updates for Android and iOS contain upgrades that help defend your device from malicious code. The updates often contain security patches — solutions for infections that might affect previous operating systems.
Installing software updates rather than putting them off reduces risk of spyware. Delaying gives hackers more time to find and exploit vulnerabilities in your device’s programming.
Install an anti-tracking browser extension
Installing an anti-tracking extension in your browser can also help keep your device safe. These programs can protect data by blocking tracking programs. Anti-tracking browser extensions can also disable features that automatically deliver your data to third parties.
Even a simple anti-tracking browser extension can help prevent spyware from reaching your device. The extension helpsminimize cookie activity as you browse the internet, reducing the chance that a system-monitoring program can acquire and deliver your information to a hacker or even to an advertiser.
How to learn more about spyware and cybersecurity
Evolving spyware is a growing concern in the cybersecurity world, and thefuture of cybersecuritywill need trained professionals to address these issues.
Aspiring spyware professionals first need to learn more about cybersecurity and its various fields. For example, many learners pursue an online technology degree in cybersecurity, software development, cloud computing or a related field. These degree programs help candidates build on-the-job skills and gain valuable experience in the tech industry.
For senior roles, some cybersecurity professionals will also need a more advanced degree. After completing an undergraduate degree, for example, you might also need a Master of Science in Cybersecurity. This program helps you further develop skills in security policies, system vulnerabilities, software development and other fields.
Cybersecurity and IT education at ۴ý
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- :This course collection can help you prepare to sit for the EC-Council Certified Ethical Hacker (CEH) exam. Topics include the phases of ethical hacking, recognizing weaknesses and vulnerabilities of a system, social engineering, IoT threats, risk mitigation and more.
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- Bachelor of Science in Cybersecurity:This online program teaches skills such as security policies, network security, cybersecurity and more. This degree is also aligned to certifications such as CEH, CND and CSCU.
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ABOUT THE AUTHOR
A graduate of Johns Hopkins University and its Writing Seminars program and winner of the Stephen A. Dixon Literary Prize, Michael Feder brings an eye for detail and a passion for research to every article he writes. His academic and professional background includes experience in marketing, content development, script writing and SEO. Today, he works as a multimedia specialist at ۴ý where he covers a variety of topics ranging from healthcare to IT.
ABOUT THE REVIEWER
Currently Dean of the College of Business and Information Technology,Kathryn Uhles has served ۴ý in a variety of roles since 2006. Prior to joining ۴ý, Kathryn taught fifth grade to underprivileged youth in ۴ý.
This article has been vetted by ۴ý's editorial advisory committee.
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