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Imagine you’re driving down a highway to get to work. There are other cars on the road, but by and large everyone is moving smoothly at a crisp, legal speed limit. Then, as you approach an entry ramp, more cars join. And then more, and more, and more until all of the sudden traffic has slowed to a crawl. This illustrates a DDoS attack.
DDoS stands for Distributed Denial of Service, and it’s a method where cybercriminals flood a network with so much malicious traffic that it cannot operate or communicate as it normally would. This causes the site’s normal traffic, also known as legitimate packets, to come to a halt. DDoS is a simple, effective and powerful technique that’s fueled by insecure devices and poor digital habits. Luckily, with a few easy tweaks to your everyday habits, you can safeguard your personal devices against DDoS attacks.
The expansion of 5G, proliferation of IoT and smart devices, and shift of more industries moving their operations online have presented new opportunities for DDoS attacks. Cybercriminals are taking advantage, and 2020 saw two of the largest DDoS offensives ever recorded. In 2020, ambitious attacks were launched on Amazon and Google. There is no target too big for cybercriminals.
DDoS attacks are one of the more troubling areas in cybersecurity, because they’re incredibly difficult to prevent and mitigate.. Preventing these attacks is particularly difficult because malicious traffic isn’t coming from a single source. There are an estimated 12.5 million devices that are vulnerable to being recruited by a DDoS attacker.
DDoS attacks are fairly simple to create. All it takes are two devices that coordinate to send fake traffic to a server or website. That’s it. Your laptop and your phone, for example, could be programmed to form their own DDoS network (sometimes referred to as a botnet, more below). However, even if two devices dedicate all of their processing power in an attack, it still isn’t enough to take down a website or server. Hundreds and thousands of coordinated devices are required to take down an entire service provider.
To amass a network of that size, cybercriminals create what’s known as a “botnet,” a network of compromised devices that coordinate to achieve a particular task. Botnets don’t always have to be used in a DDoS attack, nor does a DDoS have to have a botnet to work, but more often than not they go together like Bonnie and Clyde. Cybercriminals create botnets through fairly typical means: tricking people into downloading malicious files and spreading malware.
But malware isn’t the only means of recruiting devices. Because a good deal of companies and consumers practice poor password habits, malicious actors can scan the internet for connected devices with known factory credentials or easy-to-guess passwords (“password,” for example). Once logged in, cybercriminals can easily infect and recruit the device into their cyber army.
These recruited cyber armies can lie dormant until they’re given orders. This is where a specialized server called a command and control server (typically abbreviated as a “C2”) comes into play. When instructed, cybercriminals will order a C2 server to issue instructions to compromised devices. Those devices will then use a portion of their processing power to send fake traffic to a targeted server or website and, voila! That’s how a DDoS attack is launched.
DDoS attacks are usually successful because of their distributed nature, and the difficulty in discerning between legitimate users and fake traffic. They do not, however, constitute a breach. This is because DDoS attacks overwhelm a target to knock it offline — not to steal from it. Usually DDoS attacks will be deployed as a means of retaliation against a company or service, often for political reasons. Sometimes, however, cybercriminals will use DDoS attacks as a smokescreen for more serious compromises that may eventually lead to a full-blown breach.
DDoS attacks are only possible because devices can be easily compromised. Here are three ways you can prevent your devices from participating in a DDoS attack:
Now that you know what a DDoS attack is and how to protect against it, you’re better equipped to keep your personal devices and safe and secure.
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The post What Is a DDoS Attack and How to Stay Safe from Malicious Traffic Schemes appeared first on McAfee Blogs.
The holidays have come and gone, and students returned to the virtual classroom. But according to the FBI, cyberattacks are likely to disrupt online learning in the new year. As of December 2020, the FBI, Cybersecurity and Infrastructure Security Agency (CISA), and MS-ISAC continue to receive reports from K-12 educational institutions about the disruptions caused by cyberthreats, primarily ransomware and Distributed Denial of Service (DDoS). To protect their education and digital lives, distance learners will need to stay vigilant when it comes to ransomware and DDoS attacks. Let’s dive into the impact these threats have on the K-12 education system now that more people are plugged in as a result of distance learning.
Of all the attacks plaguing K-12 schools this year, ransomware has been a particularly aggressive threat. Ransomware attacks typically block access to a computer system or files until the victim pays a certain amount of money or “ransom.” The FBI and the CISA issued a warning that showed a nearly 30% increase in ransomware attacks against schools. In August and September, 57% of ransomware incidents involved K-12 schools, compared to 28% of all reported ransomware incidents from January through July. And it’s unlikely that hackers will let up anytime soon. Baltimore County’s school system was recently shut down by a ransomware attack that hit all of its network systems and closed schools for several days for about 111,000 students. It wasn’t until last week that school officials could finally regain access to files they feared were lost forever, including student transcripts, first-quarter grades, and vital records for children in special education programs.
According to to ZDNet, the five most active ransomware groups targeting K-12 schools are Ryuk, Maze, Nefilim, AKO, and Sodinokibi/REvil. Furthermore, all five of these ransomware families are known to run “leak sites,” where they dump data from victims who don’t pay the ransom. This creates a particularly dangerous problem of having student data published online. To prevent distance learning disruption, students and educators need to understand the effects of ransomware on school systems and take steps to prevent the damage caused by this threat.
An increase in ransomware attacks isn’t the only problem that K-12 schools are facing. The CISA and the FBI warned those participating in distance learning to protect themselves against other forms of cyberattacks such as Distributed Denial of Service (DDoS). DDoS is a method where hackers flood a network with so much traffic that it cannot operate or communicate as it normally would.
According to Dark Reading, Miami-Dade County Public Schools experienced significant disruptions during their first three days of distance learning for the 2020-2021 school year, thanks to a series of DDoS attacks. The school system stated it had already experienced more than a dozen DDoS attacks since the start of the school year. Sandwich Public Schools in Massachusetts were also knocked offline by a DDoS attack. When school systems fall victim to DDoS attacks, students can lose access to essential documents, files, or online platforms that they need to complete assignments. And with many students relying heavily on distance learning systems, losing access could put them behind.
In an effort to create a standardized framework for dealing with ransomware attacks across verticals – including education – McAfee has teamed up with Microsoft to lead the Ransomware Task Force, along with 17 other security firms, tech companies, and non-profits. And while we’re taking critical actions to decrease the threat of ransomware attacks, there are other steps you can take to prevent ransomware and DDoS attacks from interrupting your distance learning experience. Follow these tips to take charge of your education and live your digital life free from worry:
Many ransom notes seem convincing, and many only request small, seemingly doable amounts of money. Nevertheless, you should never pay the ransom. Paying does not promise you’ll get your information back, and many victims often don’t. So, no matter how desperate you are for your files, hold off on paying up.
With ransomware attacks locking away crucial data, it’s important to back up your files on all your machines. If a device becomes infected with ransomware, there’s no promise you’ll get that data back. Ensure you cover all your bases and have your data stored on an external hard drive or in the cloud.
Use decryption tools
No More Ransom – an initiative that teams up security firms, including McAfee, and law enforcement – provides tools to free your data, each tailored for a specific type of ransomware. If your device gets held for ransom, start by researching what type of ransomware it is. Then, check out No More Ransom’s decryption tools and see if one is available for your specific strain.
Your Wi-Fi router is the gateway to your network. Secure it by changing the default password. If you aren’t sure how to do this, consult the internet for instructions on how to do it for your specific make and model, or call the manufacturer. Solutions like McAfee Secure Home Platform, which is embedded within select routers, can help you easily manage and protect your network from DDoS attacks and more.
A lot of internet of things (IoT) devices come with default usernames and passwords. After taking your IoT device out of the box, the first thing you should do is change those default credentials. If you’re unsure of how to change the default setting on your IoT device, refer to setup instructions or do a bit of research online.
To stay updated on all things McAfee and on top of the latest consumer and mobile security threats, follow @McAfee_Home on Twitter, listen to our podcast Hackable?, and ‘Like’ us on Facebook.
The post Ransomware and DDoS is on the Rise: Tips for Distance Learning in 2021 appeared first on McAfee Blogs.
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