{"id":151180,"date":"2022-07-25T04:06:59","date_gmt":"2022-07-25T11:06:59","guid":{"rendered":"https:\/\/www.mcafee.com\/blogs\/?p=151180"},"modified":"2024-04-25T17:22:41","modified_gmt":"2024-04-26T00:22:41","slug":"what-are-ransomware-attacks-an-in-depth-guide","status":"publish","type":"post","link":"https:\/\/www.mcafee.com\/blogs\/tips-tricks\/what-are-ransomware-attacks-an-in-depth-guide\/","title":{"rendered":"What Are Ransomware Attacks? An In-Depth Guide"},"content":{"rendered":"

Ransomware is a malicious type of malware that cybercriminals use to encrypt the target\u2019s files or lock their computer systems, making the data inaccessible. The attackers then demand a ransom from the victim in exchange for the decryption key that can unlock the encrypted files or systems. Given its escalating prevalence and the severe threat it poses to businesses and individual users, understanding\u00a0ransomware<\/a>\u00a0is paramount in today\u2019s digital age.<\/p>\n

Traditionally, ransomware was spread mainly through phishing emails or by a user inadvertently visiting an infected website. However, more sophisticated methods of distribution are now being employed by cybercriminals, including exploiting software vulnerabilities and using social engineering techniques. Consequently, the risk of falling victim to a ransomware attack is higher than ever. Therefore, it is of utmost importance to not only comprehend what ransomware is, but also how it operates, to better\u00a0protect yourself against it<\/a>.<\/p>\n

What is ransomware?<\/span><\/b><\/h2>\n

Ransomware is malware that uses encryption to hold your information at ransom. This might mean you can\u2019t access critical data in files, databases, or applications. The cybercriminal will then usually demand a ransom to provide access.\u00a0<\/span>Often, ransomware includes a deadline to add a sense of urgency to the threat. Typical ransomware attacks might suggest that your data will be lost or published on the web for the world to see if you don\u2019t pay. Ransom demands generally ask for payment in Bitcoin or some other form of cryptocurrency, where transactions are less regulated and traceable.<\/span>\u00a0<\/span>Unfortunately, ransomware is often designed to spread across a network and target database and file servers \u2014 quickly paralyzing an entire organization. Ransomware attacks represent a growing problem, generating <\/span>billions of dollars<\/span><\/a> in payments to cybercriminals and inflicting damage and expenses for businesses and governmental organizations.\u00a0<\/span>However, if you have a basic understanding of how ransomware works, you can take steps to protect yourself.<\/span>\u00a0<\/span><\/p>\n

How does ransomware work?<\/span><\/b><\/h2>\n

Ransomware uses asymmetric encryption, which uses a mixture of symmetric and asymmetric encryption methods to make it more difficult to decrypt ransomed data files. Put simply, cybercriminals using asymmetric encryption generate a public key to encrypt files and a separate but private key to decrypt the same files. As a result, the victim has to rely on the hacker for the decryption key \u2014 for a price, of course \u2014 because the private key to decrypt the files is stored on the attacker\u2019s server. <\/span>The attacker then makes the private key available to the victim only after the ransom is paid, although this isn\u2019t always the case, as seen in recent ransomware campaigns. Without access to the private key, it can be difficult to decrypt the files being held for ransom.<\/span>\u00a0<\/span><\/p>\n

Many forms of ransomware exist. Often, ransomware (and other malware) is distributed using email spam campaigns or through targeted attacks. Malware needs an attack vector, which is how a cybercriminal gains access to a device to deliver malicious software. This might take the form of an email attachment, webpage, pop-up window, or even instant message. After malware establishes its presence, though, it\u2019ll stay on the system until it finishes its task.<\/span>\u00a0<\/span><\/p>\n

After a successful exploit, ransomware drops and executes a malicious binary on the infected system. This binary then searches and encrypts valuable files, such as Microsoft Word documents, images, databases, and so on. The ransomware may also exploit system and network vulnerabilities to spread to other systems and possibly across entire organizations.<\/span>\u00a0<\/span>Once files are encrypted, ransomware prompts the user for a ransom to be paid within 24 to 48 hours to decrypt the files, or they\u2019ll be lost forever. If a data backup is unavailable or those backups are encrypted, the victim might have to pay the ransom to recover their personal files.<\/span>\u00a0<\/span><\/p>\n

Ransomware is a lucrative business for cybercriminals. The motivation behind the attacks is primarily financial gain. Unlike other cyber-attacks, where the perpetrators need to sell the stolen information to profit, in the case of ransomware, the revenue source is direct and instant. The victims are pressed into paying the ransom to regain access to their private and valuable information. Ransomware attacks<\/a>\u00a0can be broadly classified into two categories: crypto ransomware and locker ransomware. The former focuses on encrypting critical files on the computer and rendering them inaccessible, while the latter locks the victim out of their device completely, displaying a ransom note on the login screen instead. Both types, however, share the common motif of extortion, demanding ransom from the victims in return for the key to unlock their system or decrypt their files.<\/p>\n

Examples of ransomware attacks<\/span><\/b><\/h2>\n

Cyberattacks, including different types of ransomware, occur and evolve all the time, but there are several ways to avoid them.<\/span>\u00a0<\/span><\/p>\n

It all starts with looking to the past to protect your sensitive data in the future. In the next few sections, we\u2019ll cover how hackers have engaged in extortion across computer systems over the years.<\/span>\u00a0<\/span><\/p>\n

CryptoLocker<\/span><\/b><\/h3>\n

CryptoLocker was one of the earliest adopters of this type of malware \u2014 demanding a ransom payment in cryptocurrency for a user to get their data back. In fact, it was probably the first time many people had heard the term \u201cransomware.\u201d<\/span>\u00a0<\/span><\/p>\n

In 2013, CryptoLocker attacked through an email attachment that looked like the tracking notifications of shipping companies like UPS and FedEx. It resulted in more than 250,000 infected computer systems and up to $27 million in extorted money.<\/span>\u00a0<\/span><\/p>\n

Although a decryption key has existed for CryptoLocker since 2014, it can still cause problems for users who may not recognize the presence of the ransomware before opening the attachment.<\/span>\u00a0<\/span><\/p>\n

WannaCry<\/span><\/b><\/h3>\n

In 2017, Wannacry took the \u201cworm\u201d approach to ransomware, spreading across Windows PCs through shared networks. At the time, the ransomware turned everything on the computer into encrypted data, with the hackers threatening not to return the data until the ransom was paid (in this case, cryptocurrency). Estimates point to over 200,000 computers being infected around the world.\u00a0<\/span>\u00a0<\/span><\/p>\n

A killswitch was created to help operating systems infected with WannaCry, but the hacking group is still out there posing new threats.<\/span>\u00a0<\/span><\/p>\n

Kaseya<\/span><\/b><\/h3>\n

The Kaseya ransomware attacks occurred on July 2, 2021, and led to an FBI response because this represented a global cybercrime event. In this instance, though, the ransomware group REvil made damaging use of vulnerabilities found in the on-premises software of Kaseya VSA. The hackers then demanded $70 million in Bitcoin.<\/span>\u00a0<\/span><\/p>\n

The company managed many service providers, so the attack affected all of the downstream customers of those service providers. In fact, the malware attack may have affected around 1,500 organizations across the world.\u00a0<\/span>\u00a0<\/span><\/p>\n

The good news is that patches have now been developed for affected servers.<\/span>\u00a0<\/span><\/p>\n

JBS<\/span><\/b><\/h3>\n

You might not immediately think of the world\u2019s largest meat supplier as being one of the victims of ransomware, but that\u2019s exactly what happened to JBS Foods.\u00a0<\/span>\u00a0<\/span><\/p>\n

Threatening to disrupt the food supply chain in May 2021, organized cybersecurity attacks by REvil targeted JBS\u2019s North American and Australian plants, encrypting data that was then ransomed for over $11 million worth of Bitcoin by the company.\u00a0<\/span>\u00a0<\/span><\/p>\n

Colonial Pipeline<\/span><\/b><\/h2>\n

On May 7, 2021, hackers made malicious use of a single leaked password belonging to a virtual private network (VPN) account associated with the Colonial Pipeline Company.\u00a0<\/span>\u00a0<\/span><\/p>\n

Even though the breached account had been dormant for some time, it was still successfully used as an entry point to the Colonial network. The password to this account was linked to a batch of compromised passwords on the dark web, leading officials to believe it could have been an employee who re-used the same password for other accounts.\u00a0<\/span>\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

This major cybersecurity event showcases the ways that ransomware can set up camp inside computer systems without the use of phishing.<\/span>\u00a0<\/span><\/p>\n

How to defend against ransomware<\/span><\/b><\/h2>\n

Being proactive is one of the best things you can do to safeguard against ransomware attacks. This means thinking ahead to what vulnerabilities may exist in your current computer network setup and addressing them before they\u2019re used for cyber extortion. <\/span>The best way to deal with ransomware is to prevent it from happening in the first place. This requires a multi-layered approach that includes both technical measures and user education. Some of the key preventive measures include regularly updating and patching software to fix potential security vulnerabilities, using a reputable antivirus software, regularly backing up data, and practicing safe browsing habits. Additionally, it is crucial to educate users about the dangers of clicking on suspicious links, opening unknown email attachments, or downloading software from untrusted sources. It\u2019s recommended to use comprehensive online security solutions like\u00a0McAfee+<\/a>\u00a0to ensure maximum protection against ransomware and other forms of online threats. McAfee+ offers advanced security features that safeguard your device from various malicious attacks, ensuring data privacy and complete peace of mind.<\/p>\n

\u00a0<\/span>There are several ways you can help reduce your exposure to cybercriminals by simply being alert to where they usually get in. The following sections offer information on how to set up the best possible defense against ransomware.<\/span>\u00a0<\/span><\/p>\n

Back up your data<\/span><\/b><\/h3>\n

The best way to avoid the threat of being locked out of your critical files is to ensure that you always have backup copies of them, preferably in the cloud and on an external hard drive. This way, if you do get a ransomware infection, you can wipe your computer or device free and reinstall your files from backup. This protects your data, and you won\u2019t be tempted to reward the malware authors by paying a ransom. Backups won\u2019t prevent ransomware but they can help mitigate the risks.<\/span>\u00a0<\/span><\/p>\n

Secure your backups<\/span><\/b><\/h3>\n

Make sure your backup data isn\u2019t accessible for modification or deletion from the systems where the data resides. Ransomware will look for data backups and encrypt or delete them so they can\u2019t be recovered, so it\u2019s important to use backup systems that don\u2019t allow direct access to backup files.<\/span>\u00a0<\/span><\/p>\n

Use security software and keep it up to date<\/span><\/b><\/h3>\n

Make sure all of your computers and devices are protected with comprehensive security software and keep all of your software up to date. Make sure you update your devices\u2019 software early and often, as patches for flaws are typically included in each update.<\/span><\/p>\n

Practice safe surfing<\/span><\/b><\/h3>\n

Be careful where you click. Don\u2019t respond to emails and text messages from people you don\u2019t know and only download applications from trusted sources. This is important since malware authors often use social engineering to try to get you to install dangerous files.<\/span>[Text Wrapping Break]\u00a0<\/span><\/p>\n

Only use secure networks<\/span><\/b><\/h3>\n

Avoid using public Wi-Fi networks since many of them aren\u2019t secure and cybercriminals can snoop on your internet usage. Instead, consider installing a VPN like <\/span>McAfee Secure VPN<\/span><\/a>, which provides you with a secure connection to the internet no matter where you go.<\/span>[Text Wrapping Break]\u00a0<\/span><\/p>\n

Stay informed<\/span><\/b><\/h3>\n

Keep current on the latest ransomware threats so you know what to look out for. In the case that you do get a ransomware infection and haven\u2019t backed up all of your files, know that some decryption tools are made available by tech companies to help victims.<\/span>\u00a0<\/span><\/p>\n

What to do if you\u2019re the victim of a ransomware attack<\/span><\/b><\/h2>\n

Ransomware attacks don\u2019t have to spell disaster if you catch them in time and know what to do. If you suspect you\u2019ve been hit with a ransomware attack, it\u2019s important to act quickly.\u00a0<\/span>The best way to deal with ransomware is to prevent it from happening in the first place. This requires a multi-layered approach that includes both technical measures and user education. Some of the key preventive measures include regularly updating and patching software to fix potential security vulnerabilities, using a reputable antivirus software, regularly backing up data, and practicing safe browsing habits. Additionally, it is crucial to educate users about the dangers of clicking on suspicious links, opening unknown email attachments, or downloading software from untrusted sources. It\u2019s recommended to use comprehensive online security solutions like\u00a0McAfee+<\/a>\u00a0to ensure maximum protection against ransomware and other forms of online threats. McAfee+ offers advanced security features that safeguard your device from various malicious attacks, ensuring data privacy and complete peace of mind.<\/p>\n

Fortunately, there are several steps you can take to address ransomware issues quickly and have your computer systems return to business as usual in no time.<\/span>\u00a0<\/span><\/p>\n

    \n
  1. Isolate the infected device.<\/span><\/b> Many antimalware programs start by discovering where the ransomware has made its home. This might be on a single device within your network or on many devices. Whatever the case, separating infected computers and other devices from the primary network and any other avenues to your sensitive data should be step one.<\/span><\/li>\n
  2. Assess the damages. <\/span><\/b>Understanding what the ransomware on your computer has had access to is the next step. Is it just your password-protected online accounts, or have your financial and health care records also been involved? Sometimes, the extent of the damage is immediately obvious. Other times, as with many phishing emails, you\u2019ll be able to see that only certain aspects of your private information have been hijacked.<\/span><\/li>\n
  3. Identify the ransomware.<\/span><\/b> Finding out who and what has actually breached your privacy is crucial. Well-known hacker groups like REvil and Darkside often restrict their attacks to giant corporations, but the advent of things like <\/span>ransomware as a service<\/span><\/a> (RaaS) means that bad actors can and will target anyone now.<\/span><\/li>\n
  4. Report the ransomware to authorities.<\/span><\/b> Whether you discover that you have been hit by a somewhat vintage ransomware group like Petya or a more sophisticated modern program like Ryuk, always report your ransomware experience to law enforcement. The main reason for this is to help officials continue to develop decryptor systems until there\u2019s no more ransom software to worry about. The secondary reason is so you aren\u2019t seen as complicit with the actions of any hacker group that has targeted your information.<\/span><\/li>\n
  5. Evaluate your backups.<\/span><\/b> Lastly, take a good look at your storage and backup systems once you\u2019re through the first hassles of a ransomware attack. Make sure that any external hard drives or cloud storage spaces have remained clean. If these safe spaces still exist, you can usually use them to help restore most of your sensitive data.<\/span>\u00a0<\/span><\/li>\n<\/ol>\n

    Get a personalized protection plan<\/span><\/b><\/h2>\n

    As ransomware continues to evolve, a simple antivirus may not be sufficient to protect your digital life. McAfee+, a comprehensive online security suite, offers enhanced security features to protect against ransomware. It uses real-time scanning to check your computer for viruses, including ransomware, and removes them. In addition, it incorporates cloud-based threat analysis to keep you protected against emerging threats without slowing down your computer.<\/p>\n

    McAfee+ also includes a robust password manager, helping to secure your online accounts by generating and storing complex passwords. This reduces the risk of falling victim to ransomware through compromised credentials. Furthermore, with the VPN included in McAfee+, you can browse the internet securely, even on public Wi-Fi, further decreasing the risk of ransomware attacks. Keep your digital life safe. Learn more about\u00a0McAfee+<\/a>.<\/p>\n

    Ransomware is a significant threat in the digital age that can have devastating consequences, both financially and emotionally, for individuals and businesses. Understanding what ransomware is, how it works, and its potential impact is essential in mitigating its risks. Preventive measures, such as software updates, data backup, safe online behavior, and the use of comprehensive security solutions like\u00a0McAfee+<\/a>, can provide robust defense mechanisms against ransomware attacks. Being informed and prepared is the key to maintaining a secure digital life.<\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    Ransomware is a malicious type of malware that cybercriminals use to encrypt the target\u2019s files or lock their computer systems,…<\/p>\n","protected":false},"author":674,"featured_media":156106,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10670],"tags":[],"coauthors":[3973],"class_list":["post-151180","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tips-tricks"],"acf":[],"yoast_head":"\nWhat Are Ransomware Attacks? 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