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Minecraft Servers Under Attack: Microsoft Warns About Cross-Platform DDoS Botnet

Minecraft Servers Under Attack: Microsoft Warns About Cross-Platform DDoS Botnet
Dec 16, 2022 Server Security / Botnet
Microsoft on Thursday flagged a cross-platform botnet that's primarily designed to launch distributed denial-of-service (DDoS) attacks against private Minecraft servers. Called  MCCrash , the botnet is characterized by a unique spreading mechanism that allows it to propagate to Linux-based devices despite originating from malicious software downloads on Windows hosts. "The botnet spreads by enumerating default credentials on internet-exposed Secure Shell (SSH)-enabled devices," the company  said  in a report. "Because IoT devices are commonly enabled for remote configuration with potentially insecure settings, these devices could be at risk to attacks like this botnet." This also means that the malware could persist on IoT devices even after removing it from the infected source PC. The tech giant's cybersecurity division is tracking the activity cluster under its emerging moniker DEV-1028. A majority of the infections have been reported in Russia, and

Warning: New RapperBot Campaign Aims to Launch DDoS Attacks at Game Servers

Warning: New RapperBot Campaign Aims to Launch DDoS Attacks at Game Servers
Nov 16, 2022
Cybersecurity researchers have unearthed new samples of malware called RapperBot that are being used to build a botnet capable of launching Distributed Denial of Service (DDoS) attacks against game servers. "In fact, it turns out that this campaign is less like RapperBot than an older campaign that appeared in February and then mysteriously disappeared in the middle of April," Fortinet FortiGuard Labs researchers Joie Salvio and Roy Tay  said  in a Tuesday report. RapperBot, which was first  documented  by the network security firm in August 2022, is known to exclusively brute-force SSH servers configured to accept  password authentication . The nascent malware is heavily inspired by the  Mirai botnet , whose source code leaked in October 2016, leading to the rise of several variants. What's notable about the updated version of RapperBot is its ability to perform Telnet brute-force, in addition to supporting DoS attacks using the Generic Routing Encapsulation ( GRE

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New KmsdBot Malware Hijacking Systems for Mining Crypto and Launch DDoS Attacks

New KmsdBot Malware Hijacking Systems for Mining Crypto and Launch DDoS Attacks
Nov 14, 2022
A newly discovered evasive malware leverages the Secure Shell ( SSH ) cryptographic protocol to gain entry into targeted systems with the goal of mining cryptocurrency and carrying out distributed denial-of-service (DDoS) attacks. Dubbed  KmsdBot  by the Akamai Security Intelligence Response Team (SIRT), the Golang-based malware has been found targeting a variety of companies ranging from gaming to luxury car brands to security firms. "The botnet infects systems via an SSH connection that uses weak login credentials," Akamai researcher Larry W. Cashdollar  said . "The malware does not stay persistent on the infected system as a way of evading detection." The malware gets its name from an executable named "kmsd.exe" that's downloaded from a remote server following a successful compromise. It's also designed to support multiple architectures, such as Winx86, Arm64, mips64, and x86_64. KmsdBot comes with capabilities to perform scanning operatio

Experts Warn of Browser Extensions Spying On Users via Cloud9 Chrome Botnet Network

Experts Warn of Browser Extensions Spying On Users via Cloud9 Chrome Botnet Network
Nov 09, 2022
The Keksec threat actor has been linked to a previously undocumented malware strain, which has been observed in the wild masquerading as an extension for Chromium-based web browsers to enslave compromised machines into a botnet. Called  Cloud9  by security firm Zimperium, the malicious browser add-on comes with a wide range of features that enables it to siphon cookies, log keystrokes, inject arbitrary JavaScript code, mine crypto, and even enlist the host to carry out DDoS attacks. The extension "not only steals the information available during the browser session but can also install malware on a user's device and subsequently assume control of the entire device," Zimperium researcher Nipun Gupta  said  in a new report. The JavaScript botnet isn't distributed via Chrome Web Store or Microsoft Edge Add-ons, but rather through fake executables and rogue websites disguised as Adobe Flash Player updates. Once installed, the extension is designed to inject a JavaScr

Fodcha DDoS Botnet Resurfaces with New Capabilities

Fodcha DDoS Botnet Resurfaces with New Capabilities
Oct 31, 2022
The threat actor behind the Fodcha distributed denial-of-service (DDoS) botnet has resurfaced with new capabilities, researchers reveal. This includes changes to its communication protocol and the ability to extort cryptocurrency payments in exchange for stopping the DDoS attack against a target, Qihoo 360's Network Security Research Lab  said  in a report published last week. Fodcha  first came to light  earlier this April, with the malware propagating through known vulnerabilities in Android and IoT devices as well as weak Telnet or SSH passwords. The cybersecurity company said that Fodcha has evolved into a large-scale botnet with over 60,000 active nodes and 40 command-and-control (C2) domains that can "easily generate more than 1 Tbps traffic." Peak activity is said to have occurred on October 11, 2022, when the malware targeted 1,396 devices in a single day. The top countries singled out by the botnet since late June 2022 comprises China, the U.S., Singapore,

Mirai Botnet Hits Wynncraft Minecraft Server with 2.5 Tbps DDoS Attack

Mirai Botnet Hits Wynncraft Minecraft Server with 2.5 Tbps DDoS Attack
Oct 14, 2022
Web infrastructure and security company Cloudflare disclosed this week that it halted a 2.5 Tbps distributed denial-of-service (DDoS) attack launched by a Mirai botnet. Characterizing it as a "multi-vector attack consisting of UDP and TCP floods," researcher Omer Yoachimik said the DDoS attack targeted the Minecraft server Wynncraft in Q3 2022. "The entire 2.5 Tbps attack lasted about 2 minutes, and the peak of the 26 million rps attack [was] only 15 seconds," Yoachimik  noted . "This is the largest attack we've ever seen from the bitrate perspective." Cloudflare also pointed to a surge in multi-terabit DDoS attacks as well as longer-lasting volumetric attacks during the time period, not to mention an uptick in attacks targeting Taiwan and Japan. The disclosure comes almost 10 months after Microsoft said it thwarted a  record-breaking 3.47 Tbps DDoS attack  in November 2021 directed against an unnamed Azure customer in Asia. Other  DDoS attacks

Record DDoS Attack with 25.3 Billion Requests Abused HTTP/2 Multiplexing

Record DDoS Attack with 25.3 Billion Requests Abused HTTP/2 Multiplexing
Sep 21, 2022
Cybersecurity company Imperva has disclosed that it mitigated a distributed denial-of-service (DDoS) attack with a total of over 25.3 billion requests on June 27, 2022. The "strong attack," which targeted an unnamed Chinese telecommunications company, is said to have lasted for four hours and peaked at 3.9 million requests per second (RPS). "Attackers used HTTP/2 multiplexing, or combining multiple packets into one, to send multiple requests at once over individual connections," Imperva  said  in a report published on September 19. The attack was launched from a botnet that comprised nearly 170,000 different IP addresses spanning routers, security cameras, and compromised servers located in more than 180 countries, primarily the U.S., Indonesia, and Brazil. The disclosure also comes as web infrastructure provider Akamai said it fielded a new DDoS assault aimed at a customer based in Eastern Europe on September 12, with attack traffic spiking at 704.8 million p

Hackers Using Fake DDoS Protection Pages to Distribute Malware

Hackers Using Fake DDoS Protection Pages to Distribute Malware
Aug 24, 2022
WordPress sites are being hacked to display fraudulent Cloudflare DDoS protection pages that lead to the delivery of malware such as NetSupport RAT and Raccoon Stealer. "A recent surge in JavaScript injections targeting WordPress sites has resulted in fake DDoS prevent prompts which lead victims to download remote access trojan malware," Sucuri's Ben Martin  said  in a write-up published last week. Distributed denial-of-service (DDoS) protection pages are essential browser verification checks designed to deter bot-driven unwanted and malicious traffic from eating up bandwidth and taking down websites. The new attack vector involves hijacking WordPress sites to display fake DDoS protection pop-ups that, when clicked, ultimately lead to the download of a malicious ISO file ("security_install.iso") to the victim's systems. This is achieved by injecting three lines of code into a JavaScript file ("jquery.min.js"), or alternatively into the active

Google Cloud Blocks Record DDoS attack of 46 Million Requests Per Second

Google Cloud Blocks Record DDoS attack of 46 Million Requests Per Second
Aug 19, 2022
Google's cloud division on Thursday disclosed it mitigated a series of HTTPS distributed denial-of-service (DDoS) attacks which peaked at 46 million requests per second (RPS), making it the largest such DDoS offensive recorded to date. The attack, which occurred on June 1, 2022, targeting an unnamed Google Cloud Armor customer, is 76% larger than the  26 million RPS DDoS attack  repealed by Cloudflare earlier this year, surpassing a then-record attack of 17.2 million RPS. "To give a sense of the scale of the attack, that is like receiving all the daily requests to Wikipedia (one of the top 10 trafficked websites in the world) in just 10 seconds," Google Cloud's Emil Kiner and Satya Konduru  said . It's said to have started around 9:45 a.m. PT with 10,000 RPS, before growing to 100,000 RPS eight minutes later and further ramping up within two minutes to hit a high of 46 million RPS at 10:18 a.m. PT. In all, the DDoS assault lasted for a total of 69 minutes.

Cloudflare Saw Record-Breaking DDoS Attack Peaking at 26 Million Request Per Second

Cloudflare Saw Record-Breaking DDoS Attack Peaking at 26 Million Request Per Second
Jun 15, 2022
Cloudflare on Tuesday disclosed that it had acted to prevent a record-setting 26 million request per second (RPS) distributed denial-of-service (DDoS) attack last week, making it the largest HTTPS DDoS attack detected to date. The web performance and security company said the attack was directed against an unnamed customer website using its Free plan and emanated from a "powerful" botnet of 5,067 devices, with each node generating approximately 5,200 RPS at peak. The botnet is said to have created a flood of more than 212 million HTTPS requests within less than 30 seconds from over 1,500 networks in 121 countries, including Indonesia, the U.S., Brazil, Russia, and India. Roughly 3% of the attack came through Tor nodes. The attack "originated mostly from Cloud Service Providers as opposed to Residential Internet Service Providers, indicating the use of hijacked virtual machines and powerful servers to generate the attack — as opposed to much weaker Internet of Things

Fronton: Russian IoT Botnet Designed to Run Social Media Disinformation Campaigns

Fronton: Russian IoT Botnet Designed to Run Social Media Disinformation Campaigns
May 23, 2022
Fronton, a distributed denial-of-service (DDoS) botnet that came to light in March 2020, is much more powerful than previously thought, per the latest research. "Fronton is a system developed for coordinated inauthentic behavior on a massive scale," threat intelligence firm Nisos said in a  report  published last week. "This system includes a web-based dashboard known as SANA that enables a user to formulate and deploy trending social media events en masse. The system creates these events that it refers to as Инфоповоды, 'newsbreaks,' utilizing the botnet as a geographically distributed transport." The existence of Fronton, an IoT botnet, became public knowledge following revelations from  BBC Russia  and  ZDNet  in March 2020 after a Russian hacker group known as Digital Revolution published documents that it claimed were obtained after breaking into a subcontractor to the FSB, the Federal Security Service of the Russian Federation. Further investigat

Microsoft Warns Rise in XorDdos Malware Targeting Linux Devices

Microsoft Warns Rise in XorDdos Malware Targeting Linux Devices
May 20, 2022
A Linux botnet malware known as XorDdos has witnessed a 254% surge in activity over the last six months, according to latest research from Microsoft. The trojan, so named for carrying out denial-of-service attacks on Linux systems and its use of XOR-based encryption for communications with its command-and-control (C2) server, is  known  to have been  active  since at least 2014. "XorDdos' modular nature provides attackers with a versatile trojan capable of infecting a variety of Linux system architectures," Ratnesh Pandey, Yevgeny Kulakov, and Jonathan Bar Or of the Microsoft 365 Defender Research Team  said  in an exhaustive deep-dive of the malware. "Its SSH brute-force attacks are a relatively simple yet effective technique for gaining root access over a number of potential targets." Remote control over vulnerable IoT and other internet-connected devices is gained by means of secure shell (SSH) brute-force attacks, enabling the malware to form a botnet

Cloudflare Thwarts Record DDoS Attack Peaking at 15 Million Requests Per Second

Cloudflare Thwarts Record DDoS Attack Peaking at 15 Million Requests Per Second
Apr 28, 2022
Cloudflare on Wednesday disclosed that it acted to mitigate a 15.3 million request-per-second (RPS) distributed denial-of-service (DDoS) attack. The web infrastructure and website security company called it one of the "largest HTTPS DDoS attacks on record."  "HTTPS DDoS attacks are more expensive in terms of required computational resources because of the higher cost of establishing a secure TLS encrypted connection," Cloudflare's Omer Yoachimik and Julien Desgats  said . "Therefore it costs the attacker more to launch the attack, and for the victim to mitigate it." The volumetric DDoS attack is said to have lasted less than 15 seconds and targeted an unnamed Cloudflare customer operating a crypto launchpad.  Volumetric DDoS attacks are designed to overwhelm a target network/service with significantly high volumes of malicious traffic, which typically originate from a botnet under a threat actor's control. Cloudflare said the latest attack w

Massive DDoS Attack Knocked Israeli Government Websites Offline

Massive DDoS Attack Knocked Israeli Government Websites Offline
Mar 15, 2022
A number of websites belonging to the Israeli government were felled in a distributed denial-of-service ( DDoS ) attack on Monday, rendering the portals inaccessible for a short period of time. "In the past few hours, a DDoS attack against a communications provider was identified," the Israel National Cyber Directorate (INCD)  said  in a tweet. "As a result, access to several websites, among them government websites, was denied for a short time. As of now, all of the websites have returned to normal activity." A distributed denial-of-service attack is a malicious attempt to hamper the normal traffic of a targeted server or service by overwhelming the victim and its surrounding infrastructure with a flood of junk internet traffic by leveraging compromised computers and IoT devices as sources of attack traffic. The development comes after internet watchdog NetBlocks  reported  "significant disruptions" registered on multiple networks supplied by Israel&

Hackers Abuse Mitel Devices to Amplify DDoS Attacks by 4 Billion Times

Hackers Abuse Mitel Devices to Amplify DDoS Attacks by 4 Billion Times
Mar 09, 2022
Threat actors have been observed abusing a high-impact reflection/amplification method to stage sustained distributed denial-of-service (DDoS) attacks for up to 14 hours with a record-breaking amplification ratio of 4,294,967,296 to 1. The attack vector – dubbed TP240PhoneHome ( CVE-2022-26143 ) – has been weaponized to launch significant DDoS attacks targeting broadband access ISPs, financial institutions, logistics companies, gaming firms, and other organizations. "Approximately 2,600 Mitel MiCollab and MiVoice Business Express collaboration systems acting as PBX-to-Internet gateways were incorrectly deployed with an abusable system test facility exposed to the public Internet," Akamai researcher Chad Seaman said in a joint advisory . "Attackers were actively leveraging these systems to launch reflection/amplification DDoS attacks of more than 53 million packets per second (PPS)." DDoS reflection attacks typically involve spoofing the IP address of a vic

Imperva Thwarts 2.5 Million RPS Ransom DDoS Extortion Attacks

Imperva Thwarts 2.5 Million RPS Ransom DDoS Extortion Attacks
Mar 05, 2022
Cybersecurity company Imperva on Friday said it recently mitigated a ransom distributed denial-of-service (DDoS) attack targeting an unnamed website that peaked at 2.5 million requests per second (RPS). "While ransom DDoS attacks are not new, they appear to be evolving and becoming more interesting with time and with each new phase," Nelli Klepfish, security analyst at Imperva,  said . "For example, we've seen instances where the ransom note is included in the attack itself embedded into a URL request." The top sources of the attacks came from Indonesia, followed by the U.S., China, Brazil, India, Colombia, Russia, Thailand, Mexico, and Argentina. Distributed denial-of-service (DDoS) attacks are a subcategory of denial-of-service (DoS) attacks in which an army of connected online devices, known as a botnet, is used to overwhelm a target website with fake traffic in an attempt to render it unavailable to legitimate users. The California-headquartered firm s

Russia Releases List of IPs, Domains Attacking Its Infrastructure with DDoS Attacks

Russia Releases List of IPs, Domains Attacking Its Infrastructure with DDoS Attacks
Mar 04, 2022
As the ongoing Russia-Ukraine conflict continues to escalate, the Russian government on Thursday  released  a massive list containing 17,576 IP addresses and 166 domains that it said are behind a series of distributed denial-of-service (DDoS) attacks aimed at its domestic infrastructure. Some of the noticeable domains in the listing released by Russia's National Coordination Center for Computer Incidents (NCCCI) included the U.S. Federal Bureau of Investigation (FBI), Central Intelligence Agency (CIA), and websites of several media publications such as the USA Today, 24News.ge, megatv.ge, and Ukraine's Korrespondent magazine. As part of its recommendations to counter the DDoS attacks, the agency is urging organizations to ringfence network devices, enable logging, change passwords associated with key infrastructure elements, turn off automatic software updates, disable third-party plugins on websites, enforce data backups, and watch out for phishing attacks. "Use Russ

Hackers Begin Weaponizing TCP Middlebox Reflection for Amplified DDoS Attacks

Hackers Begin Weaponizing TCP Middlebox Reflection for Amplified DDoS Attacks
Mar 02, 2022
Distributed denial-of-service (DDoS) attacks leveraging a new amplification technique called TCP Middlebox Reflection have been detected for the first time in the wild, six months after the novel attack mechanism was presented in theory. "The attack […] abuses vulnerable firewalls and content filtering systems to reflect and amplify TCP traffic to a victim machine, creating a powerful DDoS attack," Akamai researchers  said  in a report published Tuesday. "This type of attack dangerously lowers the bar for DDoS attacks, as the attacker needs as little as 1/75th (in some cases) the amount of bandwidth from a volumetric standpoint," the researchers added. A distributed reflective denial-of-service ( DRDoS ) is a form of distributed denial-of-service (DDoS) attack that relies on publicly accessible UDP servers and bandwidth amplification factors (BAFs) to overwhelm a victim's system with a high volume of UDP responses. In these attacks, the adversary sends a

A Free Solution to Protect Your Business from 6 Biggest Cyber Threats in 2022

A Free Solution to Protect Your Business from 6 Biggest Cyber Threats in 2022
Feb 21, 2022
For the last few years, the cybersecurity threat landscape has gotten progressively more complex and dangerous. The online world is now rife with data thieves, extortionists, and even state actors looking to exploit vulnerabilities in businesses' digital defenses.  And unfortunately — the bad guys have the upper hand at the moment. Part of the reason for that is the fallout from the rapid digitization made necessary by the COVID-19 pandemic. According to research on the subject,  more than half of businesses  have yet to mitigate the risks created by that digitization. And when you add a persistent shortage of cybersecurity workers to that fact, you have the makings of a scary situation. But businesses aren't helpless. There are plenty of things they can do to augment their defenses as they look to mitigate cyber risks. And best of all, some of those options won't cost them a thing. A great example of that is the open-source security platform  Wazuh . It offers busines
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