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Threat spotlight: The curious case of Ryuk ransomware

Ryuk. A name once unique to a fictional character in a popular Japanese comic book and cartoon series is now a name that appears in several rosters of the nastiest ransomware to ever grace the wild web. For an incredibly young strain—only 15 months old—Ryuk ransomware gaining such notoriety is quite a feat to achieve. Unless the threat actors behind its campaigns call it quits, too—Remember … [Read more...]

Labs quarterly report finds ransomware’s gone rampant against businesses

Ransomware’s back—so much so that we created an entire report on it. For 10 quarters, we’ve covered cybercrime tactics and techniques, covering a wide range of threats we saw lodged against consumers and businesses through our product telemetry, honeypots, and threat intelligence. We’ve looked at dangerous Trojans such as Emotet and TrickBot, the explosion and subsequent … [Read more...]

Threat Spotlight: Sodinokibi ransomware attempts to fill GandCrab void

Sodinokibi, also known as Sodin and REvil, is hardly six months old, yet it has quickly become a topic of discussion among cybersecurity professionals because of its apparent connection with the infamous-but-now-defunct GandCrab ransomware. On May 31, the threat actors behind GandCrab formally announced their retirement, detailing their plan to cease selling and advertising GandCrab in a dark … [Read more...]

A week in security (May 27 – June 2)

Last week on Malwarebytes Labs, we took readers through a deep dive—way down the rabbit hole—into the novel malware called “Hidden Bee.” We also looked at the potential impact of a government agency’s privacy framework, and delivered to readers everything they needed to know about ATM attacks and fraud. Lastly, amidst continuing news about the City of Baltimore suffering a ransomware attack, we … [Read more...]

A week in security (March 18 – 24)

Last week on Malwarebytes Labs, we touched on the susceptibility of hospitals against phishing attacks, password reuse, the risk of interactive TV shows to side-channel attacks, and Facebook’s new and out-of-character plan to promote privacy in the platform. Other cybersecurity news A study highlighted that 20 percent of Americans do not trust anyone with the protection of their data, … [Read more...]

A week in security (December 31, 2018 – January 6, 2019)

Last week on Labs, we looked back at 2018 as the year of data breaches, homed in on pre-installed malware on mobile devices, and profiled a malicious duo, Vidar and GandCrab. Other cybersecurity news 2019’s first data breach: It took less than 24 hours. An unauthorized third-party downloaded 30,000 details of Australian public servants in Victoria. It was believed that a government employee … [Read more...]

Vidar and GandCrab: stealer and ransomware combo observed in the wild

We have been tracking a prolific malvertising campaign for several weeks and captured a variety of payloads, including several stealers. One that we initially identified as Arkei turned out to be Vidar, a new piece of malware recently analyzed in detail by Fumik0_ in his post: Let’s dig into Vidar – An Arkei Copycat/Forked Stealer (In-depth analysis). In Norse Mythology, Víðarr is a god and son of … [Read more...]

What’s new in TrickBot? Deobfuscating elements

Trojan.TrickBot has been present in the threat landscape from quite a while. We wrote about its first version in October 2016. From the beginning, it was a well organized modular malware, written by developers with mature skills. It is often called a banker, however its modular structure allows to freely add new functionalities without modifying the core bot. In fact, the functionality of a banker … [Read more...]

Cybercrime tactics & techniques Q2 2018

A generally slow quarter reflects an overall lull in cybercrime, picking up where Q1 left off with cryptominers continuing to dominate, ransomware continuing to evolve through experimentation, and exploits making a small but significant comeback. In nearly every malware category for both business and consumer detections, we saw a decrease in volume, corroborating our general “Dang, it’s been a … [Read more...]

Magnitude exploit kit switches to GandCrab ransomware

The GandCrab ransomware is reaching far and wide via malspam, social engineering schemes, and exploit kit campaigns. On April 16, we discovered that Magnitude EK, which had been loyal to its own Magniber ransomware, was now being leveraged to push out GandCrab, too. While Magnitude EK remains focused on targeting South Koreans, we were able to infect an English version of Windows by replaying a … [Read more...]