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9 million PCs infected with ZeroAccess botnet

9 million PCs infected with ZeroAccess botnet

September 19, 2012Mohit Kumar
In recent months, we've seen the rootkit family Win32/Sirefef and Win64/Sirefef (also known as ZeroAccess Botnet ) update its command and control protocol and grow to infect more computers while connecting to over one million computers globally.  Before, disclosed that it creates its own hidden partition on the hard drive and uses hidden alternative data streams to hide and thrive. Then ZeroAccess developer changed infection tactics and stopped using kernel-mode components in the latest version Security firms tracked the growth of x64 version infections. But Recently uncovered by SophosLabs that ZeroAccess botnet took a major shift in strategy and operating entirely in user-mode memory. There are two distinct ZeroAccess botnets, and each has a 32-bit version and a 64-bit version, numbering four botnets in total. Each botnet is self-contained because it communicates exclusively on a particular port number hard-coded into the bot executable. The botnets can be categorised based o
Tor Anonymizing network overload caused by Mevade Botnet

Tor Anonymizing network overload caused by Mevade Botnet

September 08, 2013Anonymous
Recently, Tor Project Director - Roger Dingledine described a sudden increase in Tor users on the Tor Network after the events related to disclosure of the PRISM surveillance program, Since August 19, 2013, there has been an impressive growth in the number of Tor users. At first, No one knew who or what is responsible for this spontaneous growth of Tor users, but Security researchers at Fox-IT firm found evidence that the spike in Tor traffic is caused by a Mevade Botnet, that hides its Command-and-Control server in the anonymizing network. The security firm documented the presence of the Mevade malware architecture based on the anonymizing network, " The malware uses a command and control connectivity via Tor .Onion links using HTTP. While some bots continue to operate using the standard HTTP connectivity, some versions of the malware use a peer-to-peer network to communicate (KAD based). " " Typically, it is fairly clear what the purpose of malw
IoT Botnets Found Using Default Credentials for C&C Server Databases

IoT Botnets Found Using Default Credentials for C&C Server Databases

June 05, 2018Mohit Kumar
Not following cybersecurity best practices could not only cost online users but also cost cybercriminals. Yes, sometimes hackers don't take best security measures to keep their infrastructure safe. A variant of IoT botnet, called Owari , that relies on default or weak credentials to hack insecure IoT devices was found itself using default credentials in its MySQL server integrated with command and control (C&C) server, allowing anyone to read/write their database. Ankit Anubhav, the principal security researcher at IoT security firm NewSky Security, who found the botnets, published a blog post about his findings earlier today, detailing how the botnet authors themselves kept an incredibly week username and password combination for their C&C server's database. Guess what the credentials could be? Username: root Password: root These login credentials helped Anubhav gain access to the botnet and fetch details about infected devices, the botnet authors who
Cryptocurrency Mining Malware Infected Over Half-Million PCs Using NSA Exploit

Cryptocurrency Mining Malware Infected Over Half-Million PCs Using NSA Exploit

February 01, 2018Swati Khandelwal
2017 was the year of high profile data breaches and ransomware attacks, but from the beginning of this year, we are noticing a faster-paced shift in the cyber threat landscape, as cryptocurrency-related malware is becoming a popular and profitable choice of cyber criminals. Several cybersecurity firms are reporting of new cryptocurrency mining viruses that are being spread using EternalBlue —the same NSA exploit that was leaked by the hacking group Shadow Brokers and responsible for the devastating widespread ransomware threat WannaCry . Researchers from Proofpoint discovered a massive global botnet dubbed "Smominru," a.k.a Ismo, that is using EternalBlue SMB exploit (CVE-2017-0144) to infect Windows computers to secretly mine Monero cryptocurrency, worth millions of dollars, for its master. Active since at least May 2017, Smominru botnet has already infected more than 526,000 Windows computers, most of which are believed to be servers running unpatched versions of Wi
New Mirai Okiru Botnet targets devices running widely-used ARC Processors

New Mirai Okiru Botnet targets devices running widely-used ARC Processors

January 15, 2018Mohit Kumar
The cybersecurity threat landscape has never been more extensive and is most likely to grow exponentially in 2018. Although the original creators of Mirai DDoS botnet have already been arrested and jailed, the variants of the infamous IoT malware are still in the game due to the availability of its source code on the Internet. Security researchers have spotted a new variant of infamous Mirai IoT malware designed to hijack insecure devices that run on ARC embedded processors. Until now, Mirai and its variants have been targeting CPU architectures— including x86, ARM, Sparc, MIPS, PowerPC and Motorola 6800 —deployed in millions of Internet of Things (IoT) devices. Dubbed Okiru , the new Mirai variant, first spotted by @unixfreaxjp from MalwareMustDie team and notified by independent researcher Odisseus , is a new piece of ELF malware that targets ARC-based embedded devices running Linux operating system. " This is the FIRST TIME ever in the history of computer eng
WireX DDoS Botnet: An Army of Thousands of Hacked Android SmartPhones

WireX DDoS Botnet: An Army of Thousands of Hacked Android SmartPhones

August 28, 2017Mohit Kumar
Do you believe that just because you have downloaded an app from the official app store, you're safe from malware? Think twice before believing it. A team of security researchers from several security firms have uncovered a new, widespread botnet that consists of tens of thousands of hacked Android smartphones. Dubbed WireX, detected as "Android Clicker," the botnet network primarily includes infected Android devices running one of the hundreds of malicious apps installed from Google Play Store and is designed to conduct massive application layer DDoS attacks. Researchers from different Internet technology and security companies—which includes Akamai, CloudFlare , Flashpoint, Google, Oracle Dyn, RiskIQ, Team Cymru—spotted a series of cyber attacks earlier this month, and they collaborated to combat it. Although Android malware campaigns are quite common these days and this newly discovered campaign is also not that much sophisticated, I am quite impressed wit
U.S. Takes Down Kelihos Botnet After Its Russian Operator Arrested in Spain

U.S. Takes Down Kelihos Botnet After Its Russian Operator Arrested in Spain

April 11, 2017Mohit Kumar
A Russian computer hacker arrested over the weekend in Barcelona was apparently detained for his role in a massive computer botnet, and not for last year's US presidential election hack as reported by the Russian media. Peter Yuryevich Levashov, 32-years-old Russian computer programmer, suspected of operating the Kelihos botnet — a global network of over 100,000 infected computers that was used to deliver spam, steal login passwords, and infect computers with ransomware and other types of malware since approximately 2010, the U.S. Justice Department announced Monday. As suspected earlier, Levashov, also known as Peter Severa, is the same man who has also been listed in the World's Top 10 Worst Spammers maintained by anti-spam group Spamhaus , which has given him the 7th position in the list. The arrest was made possible after the FBI learned just last month that Levashov was traveling with his family to Spain from his home in Russia, a country without any extraditi
New IoT Botnet Malware Discovered; Infecting More Devices Worldwide

New IoT Botnet Malware Discovered; Infecting More Devices Worldwide

November 01, 2016Swati Khandelwal
The whole world is still dealing with the Mirai IoT Botnet that caused vast internet outage last Friday by launching massive distributed denial of service (DDoS) attacks against the DNS provider Dyn, and researchers have found another nasty IoT botnet. Security researchers at MalwareMustDie have discovered a new malware family designed to turn Linux-based insecure Internet of Things (IoT) devices into a botnet to carry out massive DDoS attacks. Dubbed Linux/IRCTelnet , the nasty malware is written in C++ and, just like Mirai malware , relies on default hard-coded passwords in an effort to infect vulnerable Linux-based IoT devices. The IRCTelnet malware works by brute-forcing a device's Telnet ports, infecting the device's operating system, and then adding it to a botnet network which is controlled through IRC (Internet Relay Chat) – an application layer protocol that enables communication in the form of text. So, every infected bot (IoT device) connects to a mali
Source Code for IoT botnet responsible for World's largest DDoS Attack released Online

Source Code for IoT botnet responsible for World's largest DDoS Attack released Online

October 03, 2016Mohit Kumar
With rapidly growing Internet of Thing (IoT) devices, they have become a much more attractive target for cybercriminals. Just recently we saw a record-breaking Distributed Denial of Service (DDoS) attacks against the France-based hosting provider OVH that reached over one Terabit per second (1 Tbps), which was carried out via a botnet of infected IoT devices. Now, such attacks are expected to grow more rapidly as someone has just released the source code for IoT botnet, which was 'apparently' used to carry out world's largest DDoS attacks. Internet of Things-Botnet 'Mirai' Released Online Dubbed Mirai , the malware is a DDoS Trojan that targets BusyBox systems , a collection of Unix utilities specifically designed for embedded devices like routers. The malware is programmed to hijack connected IoT devices that are using the default usernames and passwords set by the factory before devices are first shipped to customers. Spotted by Brian Krebs , the
New Botnet Hunts for Linux — Launching 20 DDoS Attacks/Day at 150Gbps

New Botnet Hunts for Linux — Launching 20 DDoS Attacks/Day at 150Gbps

September 30, 2015Swati Khandelwal
A network of compromised Linux servers has grown so powerful that it can blow large websites off the Internet by launching crippling Distributed Denial-of-service (DDoS ) attacks of over 150 gigabits per second (Gbps). The distributed denial-of-service network, dubbed XOR DDoS Botnet , targets over 20 websites per day , according to an advisory published by content delivery firm Akamai Technologies. Over 90 percent of the XOR DDoS targets are located in Asia, and the most frequent targets are the gaming sector and educational institutions. XOR creator is supposed to be from China, citing the fact that the IP addresses of all Command and Control (C&C) servers of XOR are located in Asia, where most of the infected Linux machines also reside. How XOR DDoS Botnet infects Linux System? Unlike other DDoS botnets , the XOR DDoS botnet infects Linux machines via embedded devices such as network routers and then brute forces a machine's SSH service to gain ro
FBI — Botnets Infecting 18 Computers per Second. But How Many of Them NSA Holds?

FBI — Botnets Infecting 18 Computers per Second. But How Many of Them NSA Holds?

July 17, 2014Swati Khandelwal
Botnets - a secretly compromised networks of ordinary home and office computers with rogue software or "malware" that are controlled by an individual criminal or a group - has dramatically increased over the past several years and are considered to pose the biggest threat to the Internet. Cyber criminals have brushed-up their hacking skills and are using Botnets as a cyber weapon to carry out multiple crimes like DDoS attacks (distributed denial of service), mass spamming, page rank and advertising revenue manipulation, mining bitcoins, cyber espionage and surveillance etc. 18 BOTNET INFECTIONS PER SECOND According to the director of FBI's cyber division, Joseph Demarest, Botnet has become one of the biggest enemies of the Internet today, and therefore its impact has been significant. Yesterday during a hearing before a U.S. Senate committee, he says that every second 18 computers worldwide are part of botnet armies, which amounts to over 500 million comp
After Takedown, GameOver Zeus Banking Trojan Returns Again

After Takedown, GameOver Zeus Banking Trojan Returns Again

July 12, 2014Swati Khandelwal
A month after the FBI and Europol took down the GameOver Zeus botnet by seizing servers and disrupting the botnet's operation, security researchers have unearthed a new variant of malware based explicitly on the same Gameover ZeuS that compromised users' computers and collectively formed a massive botnet. GAMEOVER ZEUS TROJAN The massive botnet, essentially a collection of zombie computers, specifically was designed to steal banking passwords with the capability to perform Denial of Service (DoS) attacks on banks and other financial institutions in order to deny legitimate users access to the site, so that the thefts kept hidden from the users. As a result of it, Gameover ZeuS' developers have stolen more than $100 million from banks, businesses and consumers worldwide. NEW GAMEOVER ZEUS TROJAN On Thursday, security researchers at the security firm Malcovery came across a series of new spam campaigns that were distributing a piece of malware based on the Gameover Zeus code which
Facebook Takes Down Bitcoin Stealing Botnet that Infected 250,000 Computers

Facebook Takes Down Bitcoin Stealing Botnet that Infected 250,000 Computers

July 09, 2014Mohit Kumar
Once again Facebook is on The Hacker News ! This time not for any scam or surveillance, but for a different reason.  The social networking giant has managed to take down a Greek botnet that used Facebook to spread malware and infected 250,000 computers to mine crypto-currencies, steal bitcoins, email passwords and banking details. Facebook is always one of the favourite weapon of cyber criminals, cyber thieves and scammers due to its popularity among other social media platforms. This social networking platform, with more than one billion active users, provides special opportunities for people to connect and share information, as well as also serves a great platform for malware developers and scammers. The botnet, dubbed as Lecpetex , was around from December 2013 to last month and compromised around 50,000 Facebook accounts at its peak, under which users would receive spam Facebook messages that would typically like "lol" with a zip archive attachment . O
New Mirai Variant and ZHtrap Botnet Malware Emerge in the Wild

New Mirai Variant and ZHtrap Botnet Malware Emerge in the Wild

March 16, 2021Ravie Lakshmanan
Cybersecurity researchers on Monday disclosed a new wave of ongoing attacks exploiting multiple vulnerabilities to deploy new Mirai variants on internet connected devices. "Upon successful exploitation, the attackers try to download a malicious shell script, which contains further infection behaviors such as downloading and executing Mirai variants and brute-forcers," Palo Alto Networks' Unit 42 Threat Intelligence Team  said  in a write-up. The rash of vulnerabilities being exploited include: VisualDoor  - a SonicWall SSL-VPN remote command injection vulnerability that came to light earlier this January CVE-2020-25506  - a D-Link DNS-320 firewall remote code execution (RCE) vulnerability CVE-2021-27561 and CVE-2021-27562  - Two vulnerabilities in Yealink Device Management that allow an unauthenticated attacker to run arbitrary commands on the server with root privileges CVE-2021-22502  - an RCE flaw in Micro Focus Operation Bridge Reporter (OBR), affecting versio
Mēris Botnet Hit Russia's Yandex With Massive 22 Million RPS DDoS Attack

Mēris Botnet Hit Russia's Yandex With Massive 22 Million RPS DDoS Attack

September 11, 2021Ravie Lakshmanan
Russian internet giant Yandex has been the target of a record-breaking distributed denial-of-service (DDoS) attack by a new botnet called Mēris. The botnet is believed to have pummeled the company's web infrastructure with millions of HTTP requests, before hitting a peak of 21.8 million requests per second (RPS), dwarfing a recent botnet-powered attack that came to light last month,  bombarding  an unnamed Cloudflare customer in the financial industry with 17.2 million RPS. Russian DDoS mitigation service Qrator Labs, which disclosed details of the attack on Thursday, called  Mēris  — meaning "Plague" in the Latvian language — a "botnet of a new kind."  "It is also clear that this particular botnet is still growing. There is a suggestion that the botnet could grow in force through password brute-forcing, although we tend to neglect that as a slight possibility. That looks like some vulnerability that was either kept secret before the massive campaign&#
Mirai Variant Adds Dozen New Exploits to Target Enterprise IoT Devices

Mirai Variant Adds Dozen New Exploits to Target Enterprise IoT Devices

March 19, 2019Swati Khandelwal
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'
Malware And Hacking Forum Seized, Dozens Arrested

Malware And Hacking Forum Seized, Dozens Arrested

July 16, 2015Swati Khandelwal
The FBI and other law enforcement agencies have arrested more than 70 people suspected of carrying out cyber criminal activities associated with one of the most active underground web forums known as Darkode . Darkode , also used by notorious Lizard Squad , was an online bazaar for cyber criminals looking to buy and sell hacking tools, botnet tools, zero-day exploits, ransomware programs, stolen credit cards, spam services and many illicit products and services. Darkode had been in operation since 2007 before law enforcement authorities seized it this week as part of an investigation carried out in 20 different countries. "We have dismantled a cyber-hornet's' nest...which was believed by many, including the hackers themselves, to be impenetrable," said U.S. Attorney David J. Hickton . The crackdown, which the FBI dubbed Operation Shrouded Horizon , was initiated two years ago by its counterparts in Europe, Brazil and law enforcement agencies in more
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