Tag Archives: botnet

What has the Necurs botnet been up to?

The Necurs botnet has been slowly growing since late 2012 and still tops the list of largest spam botnets in the world. Since then, the botnet has occasionally stopped or temporarily minimized the sending out of spam but has returned in full force. How big is the Necurs botnet? It’s difficult to say precisely, but the latest information provided by the Cisco Talos team can give a general idea. The researchers analyzed 32 distinct spam … More ?

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What has the Necurs botnet been up to?

Return of Necurs botnet brings new ransomware threat

The Necurs botnet has returned to the top ten most prevalent malware during November 2017, as cybercriminals used it to distribute a new form of ransomware, according to Check Point. Researchers found that hackers were using Necurs, considered to be the largest spam botnet in the world, to distribute the relatively new Scarab ransomware that was first seen in June 2017. The Necurs botnet started mass distribution of Scarab during the Thanksgiving holiday, sending over … More ?

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Return of Necurs botnet brings new ransomware threat

Will IoT botnets catapult the industry toward security regulation in 2018?

Attackers demonstrated the power of an IoT-fueled botnet in 2016 when the Mirai botnet took down major websites like Reddit, Twitter and GitHub. Despite the damages, no significant changes to the IoT industry occurred. As a matter of fact, consumers continue to purchase and deploy IoT devices with little care outside the guarantee that the device works and the price tag is cheap. Manufacturers continue to pump out new IoT devices at a rapid pace, … More ?

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Will IoT botnets catapult the industry toward security regulation in 2018?

Andromeda botnet dismantled in international cyber operation

On 29 November 2017, the Federal Bureau of Investigation (FBI), in close cooperation with the Luneburg Central Criminal Investigation Inspectorate in Germany, Europol’s European Cybercrime Centre (EC3), the Joint Cybercrime Action Task Force (J-CAT), Eurojust and private-sector partners, dismantled one of the longest running malware families in existence called Andromeda (also known as Gamarue). According to Microsoft, Andromeda’s main goal was to distribute other malware families. Andromeda was associated with 80 malware families and, in … More ?

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Andromeda botnet dismantled in international cyber operation

Tech firms band together to take down Android DDoS botnet

An ad-hoc alliance of tech firms has managed to seriously cripple an Android-based botnet that was being actively used to DDoS multiple content providers. The botnet, dubbed WireX by the researchers, consisted of Android devices with malicious apps installed. In fact, in the wake of the discovery, Google has pulled some 300 such apps from Google Play, began removing them remotely from affected users’ devices, and blocked them from being installed. The malicious apps The … More ?

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Tech firms band together to take down Android DDoS botnet

Surprisingly stealthy botnet has been targeting users for years

ESET researchers have unearthed a botnet of some 500,000 infected machines engaged mostly in ad-related fraud by using malicious Chrome extensions, but also Facebook fraud and brute-forcing Joomla and WordPress websites. In addition to this, the compromised machines are also equipped with a fully featured backdoor, which allows the operators to spy on all the victims, and to download additional malware on the computers. A long-standing operation There are many unusual things about the so-called … More ?

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Surprisingly stealthy botnet has been targeting users for years

Malware Hunter: Find C&C servers for botnets

Recorded Future and Shodan released Malware Hunter, a specialized crawler for security researchers that explores the Internet to find computers acting as remote access trojan (RAT) command and control centers. What Malware Hunter does Malware Hunter unearths computers hosting RAT controller software that remotely controls malware-infected computers and instructs them to execute malicious activities such as recording audio, video, and keystrokes on a victim’s machine. Using command and control servers, attackers can launch widescale attacks … More ?

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Malware Hunter: Find C&C servers for botnets

Locky ransomware makes a comeback, courtesy of Necurs botnet

The Necurs botnet has, once again, begun pushing Locky ransomware on unsuspecting victims. The botnet, which flip-flops from sending penny stock pump-and-dump emails to booby-trapped files that lead to malware (usually Locky or Dridex), has been spotted slinging thousand upon thousand of emails in the last three or four days. “Talos has seen in excess of 35K emails in the last several hours associated with this newest wave of Locky,” Cisco Talos researchers noted on … More ?

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Locky ransomware makes a comeback, courtesy of Necurs botnet

Hajime IoT worm infects devices to head off Mirai

Mirai is the name of the worm that has taken control of many IoT devices around the world and used them to mount DDoS attacks, the most high-profile of which was directed against US-based DNS provider Dyn and resulted in many websites and online services being inaccessible for hours on end. Its source code was leaked by the author, which lead to the creation of more botnets, and an increased fear that we’ll soon witness … More ?

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Hajime IoT worm infects devices to head off Mirai

IoT devices under attack: Amnesia hijacks, BrickerBot destroys

Every hour of every day, computer systems and IoT devices are under attack by bots trying to recruit them into growing botnets. Security researchers have recently highlighted two of these threats coming after Linux- and BusyBox-based systems and devices. Amnesia A year after security researcher Rotem Kerner discovered a remote code execution vulnerability that affected digital video recorders (DVRs) manufactured by Chinese company TVT Digital and sold by more than 70 different vendors around the … More ?

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IoT devices under attack: Amnesia hijacks, BrickerBot destroys