Ben Martens A backdoor is any method that allows somebody — hackers, governments, IT people, etc. — to remotely access your device without your permission or knowledge. Show
Hackers can install a backdoor onto your device by using malware, by exploiting your software vulnerabilities, or even by directly installing a backdoor in your device’s hardware/firmware. Once hackers log into your machine without your knowledge, they can use backdoors for a variety of reasons, such as:
Nobody is immune to backdoor hacking, and hackers are constantly inventing new methods and malware files to gain access to user devices. If you think you’ve been the victim of a backdoor attack, there’s a lot you can do to close the backdoors on your system, assess the damage that’s been done, and prevent another backdoor hack in the future. What Is a Backdoor & How Does It Work?In cybersecurity, a backdoor is anything that can allow an outside user into your device without your knowledge or permission. Backdoors can be installed in two different parts of your system:
A backdoor can be installed by software and hardware developers for remote tech support purposes, but in most cases, backdoors are installed either by cybercriminals or intrusive governments to help them gain access to a device, a network, or a software application. Any malware that provides hackers access to your device can be considered a backdoor — this includes rootkits, trojans, spyware, cryptojackers, keyloggers, worms, and even ransomware. How Do Backdoor Attacks Work?In order for cybercriminals to successfully install a backdoor on your device, they first need to gain access to your device, either through physical access, a malware attack, or by exploiting a system vulnerability — here are some of the more common vulnerabilities that hackers target:
Exploits are targeted attacks that take advantage of software vulnerabilities (usually in web-facing software like browsers, Adobe Flash, Java, etc.) in order to provide hackers access to your system. If you want to know more, you can check out our blog post about zero-day exploits here. For the purposes of this article, all you need to know is that there are malicious websites and ads that scan your computer for software vulnerabilities and use exploits to do things like steal your data, crash your network, or install a backdoor on your device. So, once a malware file infects your device, or your device is physically compromised (stolen or broken into), or you become the target of an exploit attack, hackers can install a backdoor on your system. Here are a few examples of the different kinds of backdoors that are frequently used:
Examples of Backdoor Attacks
Are You Vulnerable to Backdoor Attacks?Unfortunately, yes — most users have tons of weak points in their online accounts, networks, devices, and even appliances plugged into the Internet of Things (IoT). Here are some of the methods hackers use to install backdoors onto user devices:
Best Ways to Prevent Backdoor AttacksBackdoors are difficult to detect. Everyday users can’t discover a backdoor just by opening the Task Manager. But there are a few easy steps you can take to keep your device safe from backdoors virus attacks, such as: Use an AntivirusAlways use advanced antivirus software that can detect and prevent a wide range of malware, including trojans, cryptojackers, spyware, and rootkits. An antivirus will detect backdoor viruses and eliminate them before they can infect your computer. Good antivirus software like Norton 360 also includes tools like Wi-Fi monitoring, an advanced firewall, web protection, and microphone and webcam privacy monitoring to ensure you’re as safe as possible online. Download with CareBackdoors are often bundled with seemingly legitimate free software, files, and applications. When downloading any file from the internet, check to see if you’re only getting the file you wanted, or if there are some nasty hitchhikers coming along for the ride. Even a file that behaves like the file you’re looking for could be a trojan. Make sure to always download from official websites, avoid pirate sites, and install an antivirus with real-time protection that can flag malware files before you even download them onto your system. Use a FirewallFirewalls are essential for anti-backdoor protection — they monitor all incoming and outgoing traffic on your device. If someone outside of your approved network is trying to get into your device, the firewall will block them out, and if an app on your device is trying to send data out to an unknown network location, the firewall will block that app, too. Advanced firewalls can detect unauthorized backdoor traffic even when your device’s malware detection has been fooled. Windows and macOS both have pretty decent built-in firewalls, but they’re not good enough. There are a few antivirus programs with good firewalls (McAfee has excellent network protections) and you can also consider purchasing a smart firewall, which is a physical device that you connect to your router to keep your network as safe as possible. Use a Password ManagerPassword managers generate and store login information for all your accounts and even help you log into them automatically. All of this information is securely encrypted using 256-bit AES encryption and locked behind a master password. Advanced password managers like Dashlane can even enhance your password vault’s security using biometric login or 2FA tools like TOTP generators and USB tokens. Because they generate random, complex passwords, password managers make it a lot harder for hackers to get into your network or spread across your network in the event that you get a backdoor installed on your system. Stay on Top of Security Updates/PatchesZero-day attacks are pretty rare, and most hackers just recycle the same exploits and malware because it’s cheap and easy for them to do so. Plus, it works. One in three IT professionals (34%) in Europe admitted that their company had been breached as a result of an unpatched vulnerability. Software developers frequently publish new patches to fix the vulnerabilities in their software, and it’s not hard to install those updates. Many programs even include an auto-update option. If you’re a macOS or Windows user, navigate to your settings and turn “Automatic Updates” on — it’s especially important to keep your OS updated because backdoors depend on fooling your operating system. Frequently Asked Questions About Backdoor AttacksA backdoor is any method that can allow another user to access your device without your knowledge or consent (and usually without the device’s knowledge, either). A backdoor can be installed by software and hardware developers, or it can be installed by cybercriminals in order to gain unauthorized access to a device, install malware, steal user data, or sabotage a network. How do backdoor attacks work?In a backdoor attack, hackers first find a weak point or a compromised application in your device to exploit — this could be a vulnerability in an application, an open port on your network, an account with a weak password, or a piece of malware that was installed on your device. The hacker then uses complex tools to deceive your device, your network, or your online account into thinking that the backdoor is a legitimate application. Once your device is compromised, the backdoor can be used to deploy malware onto your device (like cryptojackers, rootkits, or ransomware), steal your data and spy on your activity, or just install viruses to crash your device. What can cybercriminals do with a backdoor?Depending on how sophisticated a backdoor program is, it can allow hackers to perform malicious activities such as DDoS attacks, sending and receiving files, changing system settings, taking screenshots, and playing tricks like opening and closing the DVD drive. Hackers can even remotely access your device from their computer using a backdoor, navigating all of your files and software from the safety of their own home. Edward Snowden revealed that the NSA had forced backdoors into tons of user electronics and even widespread cryptographic protocols, enabling them to listen in on anybody’s conversations, activate microphones and cameras, and gather user data remotely. How can you prevent backdoor attacks?There are strategies that can be used to prevent and reduce the risk of a backdoor attack, but the first and most important step in staying safe from malware is getting a reliable antivirus program. For example, Norton 360 comes with real-time protection (which can prevent backdoor malware from being installed on your computer), a firewall (which can detect and prevent unwanted web traffic), a password manager (which can keep your accounts from getting broken into), a vulnerability scanner (which can tell you if you need software updates), and dark web monitoring (which can warn if your data has been breached). Aside from that, just use good common sense online. Only use HTTPS websites whenever possible, avoid pirate websites, don’t give your personal information to untrustworthy sites, and scan any files you download with an antivirus program. |