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Github – the popular code sharing website used by programmers to collaborate on software development – again became a victim of a distributed-denial-of-service (DDoS) attack on Tuesday morning. The attack came just a few months after the popular code repository website GitHub suffered a massive DDoS attack, which was linked to China. Also Read: China Using A Powerful 'Great Cannon' Weapon to Censor The Internet The company was made aware of the issue early on Tuesday. After investigating the problem, the team discovered that the service was under a new DDoS attack. The code repository disclosed the new attack on its status page as well as its official Twitter account. "The connectivity problems have been identified as a DDoS attack. We're working to mitigate now," GitHub status log read early on Tuesday. The March DDoS attack against GitHub lasted close to a week . At the time, the attackers used malicious JavaScript to hijack Internet...

The bar has been raised. As more amplified attacks were expected following the record-breaking 1.35 Tbps Github DDoS attack , someone has just set a new record after only four days — 1.7 Tbps DDoS attack. Network security and monitoring company Arbor Networks claims that its ATLAS global traffic and DDoS threat data system have recorded a 1.7Tbps reflection/amplification attack against one of its unnamed US-based customer's website. Similar to the last week's DDoS attack on GitHub, the massive bandwidth of the latest attack was amplified by a factor of 51,000 using thousands of misconfigured Memcached servers exposed on the Internet. Memcached, a popular open source distributed memory caching system, came into news earlier last week when researchers detailed how attackers could abuse it to launch amplification DDoS attack by sending a forged request to the targeted Memcached server on port 11211 using a spoofed IP address that matches the victim's IP. A few b...

Github – a popular coding website used by programmers to collaborate on software development – was hit by a large-scale distributed denial of service (DDoS) attack for more than 24 hours late Thursday night. It seems like when users from outside countries visit different websites on the Internet that serve advertisements and tracking code from Chinese Internet giant Baidu , the assailants on Chinese border quietly inject malicious JavaScript code into the pages of those websites. The code instructs browsers of visitors to those websites to rapidly connect to GitHub.com every two seconds in a way that visitors couldn't smell, creating "an extremely large amount of traffic," according to a researcher who goes by the name A nthr@x . "A certain device at the border of China's inner network and the Internet has hijacked the HTTP connections went into China, replaced some JavaScript files from Baidu with malicious ones," A nthr@x wrote at Insight La...

On Wednesday, February 28, 2018, GitHub's code hosting website hit with the largest-ever distributed denial of service (DDoS) attack that peaked at record 1.35 Tbps. Interestingly, attackers did not use any botnet network, instead weaponized misconfigured Memcached servers to amplify the DDoS attack. Earlier this week we published a report detailing how attackers could abuse Memcached, popular open-source and easily deployable distributed caching system, to launch over 51,000 times powerful DDoS attack than its original strength. Dubbed Memcrashed , the amplification DDoS attack works by sending a forged request to the targeted Memcrashed server on port 11211 using a spoofed IP address that matches the victim's IP. A few bytes of the request sent to the vulnerable server trigger tens of thousands of times bigger response against the targeted IP address. "This attack was the largest attack seen to date by Akamai, more than twice the size of the September 2016...

China has something very impressive that we are not aware of. The country has a powerful and previously unknown weapon that its government is using to bolster their cyber attack capabilities: Dubbed " The Great Cannon. " INTERNET CENSORSHIP IN CHINA When I talk about Internet censorship, it is incomplete if I don't mention China. China is famous for its Great Wall of China and Great Firewall of China . The censoring of Internet access and blocking an individual website in China by its government, known as the Great Firewall of China. But, why the Chinese government does that? The answer is very simple: The Chinese government restricts those contents it deems sensitive for its country's so-called democracy. It illegalize certain online speech and activities, block selected websites, and filter keywords out of searches initiated from computers located in Mainland China. The worse: Those Chinese citizens who offend authorities against Int...

Two separate proofs-of-concept (PoC) exploit code for Memcached amplification attack have been released online that could allow even script-kiddies to launch massive DDoS attacks using UDP reflections easily. The first DDoS tool is written in C programming language and works with a pre-compiled list of vulnerable Memcached servers. Bonus—its description already includes a list of nearly 17,000 potential vulnerable Memcached servers left exposed on the Internet. Whereas, the second Memcached DDoS attack tool is written in Python that uses Shodan search engine API to obtain a fresh list of vulnerable Memcached servers and then sends spoofed source UDP packets to each server. Last week we saw two record-breaking DDoS attacks— 1.35 Tbps hit Github and 1.7 Tbps attack against an unnamed US-based company—which were carried out using a technique called amplification/reflection attack. For those unaware, Memcached-based amplification/reflection attack amplifies bandwidth of th...

You might be surprised to know that your security cameras, Internet-connected toasters and refrigerators may have inadvertently participated in the massive cyber attack that broke a large portion of the Internet on Friday. That's due to massive Distributed Denial of Service (DDoS) attacks against Dyn, a major domain name system (DNS) provider that many sites and services use as their upstream DNS provider for turning IP addresses into human-readable websites. The result we all know: Twitter, GitHub, Amazon, Netflix, Pinterest, Etsy, Reddit, PayPal, and AirBnb, were among hundreds of sites and services that were rendered inaccessible to Millions of people worldwide for several hours. Why and How the Deadliest DDoS Attack Happened It was reported that the Mirai bots were used in the massive DDoS attacks against DynDNS, but they "were separate and distinct" bots from those used to execute record-breaking DDoS attack against French Internet service and hosting...

Guess how many devices participated in last Friday's massive DDoS attack against DNS provider Dyn that caused vast internet outage? Just 100,000 devices. I did not miss any zeros. Dyn disclosed on Wednesday that a botnet of an estimated 100,000 internet-connected devices was hijacked to flood its systems with unwanted requests and close down the Internet for millions of users. Dyn executive vice president Scott Hilton has issued a statement , saying all compromised devices have been infected with a notorious Mirai malware that has the ability to take over cameras, DVRs, and routers. "We're still working on analyzing the data but the estimate at the time of this report is up to 100,000 malicious endpoints," Hilton said. "We are able to confirm that a significant volume of attack traffic originated from Mirai-based botnets." Mirai malware scans for Internet of Things (IoT) devices that are still using their default passwords and then enslaves those...

UPDATE — How an army of million of hacked Internet-connected smart devices almost broke the Internet today. Cyber attacks are getting evil and worst nightmare for companies day-by-day, and the Distributed Denial of Service (DDoS) attack is one such attacks that cause a massive damage to any service. Recently, the Internet witnessed a record-breaking largest DDoS attack of over 1 Tbps against France-based hosting provider OVH, and now the latest victim of the attack is none other than Dyn DNS provider. A sudden outage of popular sites and services, including Twitter, SoundCloud, Spotify, and Shopify, for many users, is causing uproar online. It's because of a DDoS attack against the popular Domain Name System (DNS) service provider Dyn, according to a post on Ycombinator . DNS act as the authoritative reference for mapping domain names to IP addresses. In other words, DNS is simply an Internet's phone book that resolves human-readable web addresses, like thehackerne...

Distributed Denial of Service (DDoS) attack is a malicious form of attack that disrupts the regular network traffic by overwhelming the website with more traffic than the server can handle. The main aim of this kind of cyberattack is to render the website inoperable. Over recent years, these kinds of attacks are increasing, fueling the demand for the  best DDoS protection  software solutions. Many unplanned data center outages are owing to DDoS attacks. The threat of DDoS is due to access to easy-to-use tools and the profit potential through extortion.  The attacks target businesses directly, leading to substantial financial and personal losses, making it critical to have robust DDoS protection software solutions in place. According to the report of  Market Research Inc , the DDoS protection Software Market is predicted to reach +14% CAGR by 2020 – 2028.  Important Statistics to illustrate the growing demand for DDoS Software Solutions Demand for the DDoS ...

Cybercriminals have figured out a way to abuse widely-used Memcached servers to launch over 51,000 times powerful DDoS attacks than their original strength, which could result in knocking down of major websites and Internet infrastructure. In recent days, security researchers at Cloudflare , Arbor Networks , and Chinese security firm Qihoo 360 noticed that hackers are now abusing "Memcached" to amplify their DDoS attacks by an unprecedented factor of 51,200. Memcached is a popular open-source and easily deployable distributed caching system that allows objects to be stored in memory and has been designed to work with a large number of open connections. Memcached server runs over TCP or UDP port 11211. The Memcached application has been designed to speed up dynamic web applications by reducing stress on the database that helps administrators to increase performance and scale web applications. It's widely used by thousands of websites, including Facebook, Flickr,...

A massive Distributed Denial of Service (DDoS) attack against Dyn , a major domain name system (DNS) provider, broke large portions of the Internet on Friday, causing a significant outage to a ton of websites and services, including Twitter, GitHub, PayPal, Amazon, Reddit, Netflix, and Spotify. But how the attack happened? What's the cause behind the attack? Exact details of the attack remain vague, but Dyn reported a huge army of hijacked internet-connected devices could be responsible for the massive attack. Yes, the same method recently employed by hackers to carry out record-breaking DDoS attack of over 1 Tbps against France-based hosting provider OVH. According to security intelligence firm Flashpoint , Mirai bots were detected driving much, but not necessarily all, of the traffic in the DDoS attacks against DynDNS. Mirai is a piece of malware that targets Internet of Things (IoT) devices such as routers, and security cameras, DVRs, and enslaves vast numbers of ...

Cybersecurity researchers have disclosed details of a new botnet that customers can rent access to conduct distributed denial-of-service (DDoS) attacks against targets of interest. The ShadowV2 botnet, according to Darktrace, predominantly targets misconfigured Docker containers on Amazon Web Services (AWS) cloud servers to deploy a Go-based malware that turns infected systems into attack nodes and co-opt them into a larger DDoS botnet. The cybersecurity company said it detected the malware targeting its honeypots on June 24, 2025. "At the center of this campaign is a Python-based command-and-control (C2) framework hosted on GitHub Codespaces," security researcher Nathaniel Bill said in a report shared with The Hacker News. "What sets this campaign apart is the sophistication of its attack toolkit. The threat actors employ advanced methods such as HTTP/2 Rapid Reset , a Cloudflare under attack mode ( UAM ) bypass, and large-scale HTTP floods, demonstrating a capabi...

Yes, you only need a single laptop with a decent internet connection, rather a massive botnet, to launch overwhelming denial of service (DoS) attacks in order to bring down major Internet servers and modern-day firewalls. Researchers at TDC Security Operations Center have discovered a new attack technique that lone attackers with limited resources (in this case, a laptop and at least 15Mbps of bandwidth) can use to knock large servers offline. Dubbed a BlackNurse attack or the low-rate " Ping of Death " attack, the technique can be used to launch several low-volume DoS attacks by sending specially formed Internet Control Message Protocol (ICMP) packets, or 'pings' that overwhelm the processors on server protected by firewalls from Cisco, Palo Alto Networks, among others. ICMP is a protocol used by routers and other networking devices to send and receive error messages. According to a technical report [ PDF ] published this week, the BlackNurse attack is mo...

Bad news for gamers! It's once again the time when most of you will get new PlayStations and XBoxes that continue to be among the most popular gifts for Christmas, but possibilities are you'll not be able to log into the online gaming console, just like what happens on every Christmas holidays. On 2014 Christmas holidays, the notorious hacker group Lizard Squad knocked the PlayStation Network and Xbox Live offline for many gamers by launching massive DDoS attacks against the gaming networks. This time a new hacking group, who managed to take down Tumblr this week for almost two hours, has warned gamers of launching another large-scale distributed denial-of-service (DDoS) attack against XBox Live and PlayStation networks. Calling itself R.I.U. Star Patrol , the hacking group, posted a video on YouTube , announcing that they're planning to take down Sony's PSN and Microsoft's Xbox Live on Christmas Day by launching coordinated DDoS attacks. "We do it because w...

Cybersecurity researchers have disclosed details of a new distributed denial-of-service (DDoS) attack campaign targeting misconfigured Jupyter Notebooks. The activity, codenamed Panamorfi by cloud security firm Aqua, utilizes a Java-based tool called mineping to launch a TCP flood DDoS attack. Mineping is a DDoS package designed for Minecraft game servers. Attack chains entail the exploitation of internet-exposed Jupyter Notebook instances to run wget commands for fetching a ZIP archive hosted on a file-sharing site called Filebin. The ZIP file contains two Java archive (JAR) files, conn.jar and mineping.jar, with the former used to establish connections to a Discord channel and trigger the execution of the mineping.jar package. "This attack aims to consume the resources of the target server by sending a large number of TCP connection requests," Aqua researcher Assaf Morag said . "The results are written to the Discord channel." The attack campaign has bee...

Memcached reflections that recently fueled two most largest amplification DDoS attacks in the history have also helped other cybercriminals launch nearly 15,000 cyber attacks against 7,131 unique targets in last ten days, a new report revealed. Chinese Qihoo 360's Netlab, whose global DDoS monitoring service ' DDosMon ' initially spotted the Memcached-based DDoS attacks, has published a blog post detailing some new statistics about the victims and sources of these attacks. The list of famous online services and websites which were hit by massive DDoS attacks since 24th February includes Google, Amazon, QQ.com, 360.com, PlayStation, OVH Hosting, VirusTotal, Comodo, GitHub ( 1.35 Tbps attack ), Royal Bank, Minecraft and RockStar games, Avast, Kaspersky, PornHub, Epoch Times newspaper, and Pinterest. Overall, the victims are mainly based in the United States, China, Hong Kong, South Korea, Brazil, France, Germany, the United Kingdom, Canada, and the Netherlands. ...