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Citrix has issued an emergency advisory warning its customers of a security issue affecting its NetScaler application delivery controller (ADC) devices that attackers are abusing to launch amplified distributed denial-of-service (DDoS) attacks against several targets . "An attacker or bots can overwhelm the Citrix ADC [Datagram Transport Layer Security] network throughput, potentially leading to outbound bandwidth exhaustion," the company  noted . "The effect of this attack appears to be more prominent on connections with limited bandwidth." ADCs are purpose-built  networking appliances  whose function is to improve the performance, security, and availability of applications delivered over the web to end-users. The desktop virtualization and networking service provider said it's monitoring the incident and is continuing to investigate its impact on Citrix ADC, adding "the attack is limited to a small number of customers around the world." The iss

At present, web applications have become the top targets for attackers because of potential monetization opportunities. Security breaches on the web application can cost millions. Strikingly, DNS (Domain Name System) related outage and Distributed denial of service (DDoS) lead a negative impact on businesses. Among the wide range of countermeasures, a web application firewall is the first line of defense. Web Application Firewall's basic function is to establish a hardened boundary to prevent certain malicious traffic types from acquiring resources. Though WAFs have been available since the late nineties, this early generation technology is no match for recent sophisticated cyber-attacks. They are not capable enough to offer full application control and visibility. With these increasing security risks, the new age web application firewall is the only solution that can provide proper protection. Traditional WAFs Died Or At Least Dying In the early days, web apps were less common

The introduction of Open AI's ChatGPT was a defining moment for the software industry, touching off a GenAI race with its November 2022 release. SaaS vendors are now rushing to upgrade tools with enhanced productivity capabilities that are driven by generative AI. Among a wide range of uses, GenAI tools make it easier for developers to build software, assist sales teams in mundane email writing, help marketers produce unique content at low cost, and enable teams and creatives to brainstorm new ideas.  Recent significant GenAI product launches include Microsoft 365 Copilot, GitHub Copilot, and Salesforce Einstein GPT. Notably, these GenAI tools from leading SaaS providers are paid enhancements, a clear sign that no SaaS provider will want to miss out on cashing in on the GenAI transformation. Google will soon launch its SGE "Search Generative Experience" platform for premium AI-generated summaries rather than a list of websites.  At this pace, it's just a matter of a short time befo

Hackers always find a way in, even if there's no software vulnerability to exploit. The FBI has arrested a Russian national who recently traveled to the United States and offered $1 million in bribe to an employee of a targeted company for his help in installing malware into the company's computer network manually. Egor Igorevich Kriuchkov , 27-year-old, entered the United States as a tourist and was arrested in Los Angeles after meeting with the unnamed employee of an undisclosed Nevada-based company numerous times, between August 1 to August 21, to discuss the conspiracy. "On or about July 16, EGOR IGOREVICH KRIUCHKOV used his WhatsApp account to contact the employee of victim company and arranged to visit in person in the District of Nevada," the court documents say. "On or about July 28, EGOR IGOREVICH KRIUCHKOV entered the United States using his Russian Passport and a B1/B2 tourist visa." Kriuchkov also asked the employee to participate in

Israeli cybersecurity researchers have disclosed details about a new flaw impacting DNS protocol that can be exploited to launch amplified, large-scale distributed denial-of-service (DDoS) attacks to takedown targeted websites. Called NXNSAttack , the flaw hinges on the DNS delegation mechanism to force DNS resolvers to generate more DNS queries to authoritative servers of attacker's choice, potentially causing a botnet-scale disruption to online services. "We show that the number of DNS messages exchanged in a typical resolution process might be much higher in practice than what is expected in theory, mainly due to a proactive resolution of name-servers' IP addresses," the researchers said in the paper. "We show how this inefficiency becomes a bottleneck and might be used to mount a devastating attack against either or both, recursive resolvers and authoritative servers." Following responsible disclosure of NXNSAttack, several of the companies i

Cybersecurity researchers have discovered a new emerging IoT botnet threat that leverages compromised smart devices to stage ' distributed denial-of-service ' attacks, potentially triggered on-demand through platforms offering DDoS-for-hire services. The botnet, named "dark_nexus" by Bitdefender researchers, works by employing credential stuffing attacks against a variety of devices, such as routers (from Dasan Zhone, Dlink, and ASUS), video recorders, and thermal cameras, to co-opt them into the botnet. So far, dark_nexus comprises at least 1,372 bots, acting as a reverse proxy, spanning across various locations in China, South Korea, Thailand, Brazil, and Russia. "While it might share some features with previously known IoT botnets, the way some of its modules have been developed makes it significantly more potent and robust," the researchers said . "For example, payloads are compiled for 12 different CPU architectures and dynamically deliver

A team of German cybersecurity researchers has discovered a new cache poisoning attack against web caching systems that could be used by an attacker to force a targeted website into delivering error pages to most of its visitors instead of legitimate content or resources. The issue could affect sites running behind reverse proxy cache systems like Varnish and some widely-used Content Distribution Networks (CDNs) services, including Amazon CloudFront, Cloudflare, Fastly, Akamai, and CDN77. In brief, a Content Distribution Network (CDN) is a geographically distributed group of servers that sit between the origin server of a website and its visitors to optimize the performance of the website. A CDN service simply stores/caches static files—including HTML pages, JavaScript files, stylesheets, images, and videos—from the origin server and delivers them to visitors more quickly without going back to the originating server again and again. Each of the geographically distributed CDN se

A 23-year-old hacker from Utah who launched a series of DDoS attacks against multiple online services, websites, and online gaming companies between December 2013 and January 2014 has been sentenced to 27 months in prison. Austin Thompson, a.k.a. "DerpTroll," pledged guilty back in November 2018 after he admitted to being a part of DerpTrolling , a hacker group that was behind DDoS attacks against several major online gaming platforms including Electronic Arts' Origin service, Sony PlayStation network, and Valve Software's Steam during Christmas. "Thompson typically used the Twitter account @DerpTrolling to announce that an attack was imminent and then posted "scalps" (screenshots or other photos showing that victims' servers had been taken down) after the attack," the DoJ says. According to a U.S. Department of Justice press release published Wednesday, Thompson's actions caused the victim companies at least $95,000 in damages. T

Telegram, one of the most popular encrypted messaging app, briefly went offline yesterday for hundreds of thousands of users worldwide after a powerful distributed denial-of-service (DDoS) attack hit its servers. Telegram founder Pavel Durov later revealed that the attack was mainly coming from the IP addresses located in China, suggesting the Chinese government could be behind it to sabotage Hong Kong protesters. Since last week, millions of people in Hong Kong are fighting their political leaders over the proposed amendments to an extradition law that would allow a person arrested in Hong Kong to face trial elsewhere, including in mainland China. Many people see it as a fundamental threat to the territory's civic freedoms and the rule of law. Many people in Hong Kong are currently using Telegram's encrypted messaging service to communicate without being spied on, organize the protest, and alert each other about activities on the ground. According to Telegram, th

Security researchers have uncovered a new variant of the infamous Mirai Internet of Things botnet , this time targeting embedded devices intended for use within business environments in an attempt to gain control over larger bandwidth to carry out devastating DDoS attacks . Although the original creators of Mirai botnet have already been arrested and jailed , variants of the infamous IoT malware, including Satori and Okiru , keep emerging due to the availability of its source code on the Internet since 2016. First emerged in 2016, Mirai is well known IoT botnet malware that has the ability to infect routers, and security cameras, DVRs, and other smart devices—which typically use default credentials and run outdated versions of Linux—and enslaves the compromised devices to form a botnet, which is then used to conduct DDoS attacks . New Mirai Variant Targets Enterprise IoT Devices Now, Palo Alto Network Unit 42 researchers have spotted the newest variant of Mirai that'

Ukrainian Police have this week busted out two separate groups of hackers involved in carrying out DDoS attacks against news agencies and stealing money from Ukrainian citizens, respectively. According to the authorities, the four suspected hackers they arrested last week , all aged from 26 to 30 years, stole more than 5 million Hryvnia (around 178,380 USD) from the bank accounts of Ukrainian citizens by hacking into their computers. The suspects carried out their attacks by scanning vulnerable computers on the Internet and infecting them with a custom Trojan malware to take full remote control of the systems. The group then apparently enabled key-logging on the infected computers in an attempt to capture banking credentials of victims when the owners of those infected computers fill in that information on any banking site or their digital currency wallet. Once getting a hold on the victims banking and financial data, the attackers logged into their online banking accounts

A simple DDoS attack could land you in jail for 10 years or even more. A Massachusetts man has been sentenced to over 10 years in prison for launching DDoS attacks against the computer network of two healthcare organizations in 2014 to protest the treatment of a teenager at the centers. Beyond serving 121 months in prison, Martin Gottesfeld , 34, was also ordered by U.S. District Judge Nathaniel Gorton to pay nearly $443,000 in restitution for damages he caused to the targeted facilities. Gottesfeld carried out the DDoS attacks on behalf of the Anonymous hacker collective against Boston Children's Hospital (BCH) and Wayside Youth & Family Support Network—a nonprofit home treatment facility that provides a range of mental health counselings to children, young adults, and families in Massachusetts. In April 2014, the hacker used a botnet of over 40,000 network routers that he infected with customized malicious software to carry out the DDoS attacks that not only knocke

The FBI just saved the Christmas. The U.S. Justice Department announced earlier today that the FBI has seized domains of 15 "DDoS-for-hire" websites and charged three individuals running some of these services. DDoS-for-hire , or "Booter" or "Stresser," services rent out access to a network of infected devices, which then can be used by anyone, even the least tech-savvy individual, to launch distributed denial-of-service (DDoS) attacks against any website and disrupt its access. In recent years, multiple hacking groups ruined Christmas Day for millions of gamers by taking down PlayStation, Xbox networks and other gaming servers using massive DDoS attacks. "Booter services such as those named in this action allegedly cause attacks on a wide array of victims in the United States and abroad, including financial institutions, universities, internet service providers, government systems, and various gaming platforms," the DoJ said. &qu

A 23-year-old hacker from Utah pleaded guilty this week to launching a series of denial-of-service (DoS) attacks against multiple online services, websites, and online gaming companies between 2013 and 2014. According to a Justice Department (DoJ) press release, Austin Thompson , a.k.a. "DerpTroll," took down servers of several major gaming platforms including Electronic Arts' Origin service, the Sony PlayStation network , and Valve Software's Steam, between December 2013 and January 2014, by flooding them with enough internet traffic. Thompson then typically used the Twitter account the @DerpTrolling handle to announce his attacks, subsequently posting screenshots or other photos of the server being unavailable after launching DDoS attacks. The attacks usually took down game servers and related computers of the victim companies for at least a few hours at a time, causing at least $95,000 in damages to the gaming companies around the world. "Denial-of

The Bitcoin Core development team has released an important update to patch a major DDoS vulnerability in its underlying software that could have been fatal to the Bitcoin Network, which is usually known as the most hack-proof and secure blockchain. The DDoS vulnerability, identified as CVE-2018-17144, has been found in the Bitcoin Core wallet software, which could potentially be exploited by anyone capable of mining BTC to crash Bitcoin Core nodes running software versions 0.14.0 to 0.16.2. In other words, Bitcoin miners could have brought down the entire blockchain either by overflooding the block with duplicate transactions, resulting in blockage of transaction confirmation from other people or by flooding the nodes of the Bitcoin P2P network and over-utilizing the bandwidth. The vulnerability had been around since March last year, but the team says nobody noticed the bug or nobody was willing to incur the expense of exploiting it. According to the bitcoin core developers

British police have arrested a 19-year-old teen who is an alleged member of Apophis Squad cybercriminal group responsible for making hoax bomb threats to thousands of schools and airlines; and DDoSing ProtonMail and Tutanota secure email services. George Duke-Cohan was arrested in his bedroom at his family home in Watford by British National Crime Agency (NCA) on 31st August and pledged guilty to three counts of making bomb threats to schools and airlines in Luton Magistrates' Court on Monday. Duke-Cohan spammed out more than 24,000 emails to schools across the UK and in the US as well, claiming that pipe bombs had been planted on the premises, which would blow up the building if $5,000 extortion money was not made within 3 hours. He Got Arrested Third-Time For Making Hoax Bomb Threats This is not the first time Duke-Cohan has been arrested for spreading fake bomb threats. He first created panic in March this year when he emailed thousands of schools in the UK warnin

Shortly after Cisco's released its early report on a large-scale hacking campaign that infected over half a million routers and network storage devices worldwide, the United States government announced the takedown of a key internet domain used for the attack. Yesterday we reported about a piece of highly sophisticated IoT botnet malware that infected over 500,000 devices  in 54 countries and likely been designed by Russia-baked state-sponsored group in a possible effort to cause havoc in Ukraine, according to an early report published by Cisco's Talos cyber intelligence unit on Wednesday. Dubbed VPNFilter by the Talos researchers, the malware is a multi-stage, modular platform that targets small and home offices (SOHO) routers and storage devices from Linksys, MikroTik, NETGEAR, and TP-Link, as well as network-access storage (NAS) devices. Meanwhile, the court documents unsealed in Pittsburgh on the same day indicate that the FBI has seized a key web domain communic

More than half a million routers and storage devices in dozens of countries have been infected with a piece of highly sophisticated IoT botnet malware, likely designed by Russia-baked state-sponsored group. Cisco's Talos cyber intelligence unit have discovered an advanced piece of IoT botnet malware, dubbed VPNFilter , that has been designed with versatile capabilities to gather intelligence, interfere with internet communications, as well as conduct destructive cyber attack operations. The malware has already infected over 500,000 devices in at least 54 countries, most of which are small and home offices routers and internet-connected storage devices from Linksys, MikroTik, NETGEAR, and TP-Link. Some network-attached storage (NAS) devices known to have been targeted as well. VPNFilter is a multi-stage, modular malware that can steal website credentials and monitor industrial controls or SCADA systems, such as those used in electric grids, other infrastructure and factori