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RegretLocker, new ransomware, can encrypt Windows virtual hard disks

Cybersecurity researchers discovered a new ransomware last month called RegretLocker that, despite a no-frills package, can do serious damage to virtual hard disks on Windows machines. Through a clever trick, RegretLocker can bypass the often-long encryption times required when encrypting a machine’s virtual hard disks, and it can close any files currently opened by a user to then encrypt … [Read more...]

New Emotet delivery method spotted during downward detection trend

Emotet, one of cybersecurity’s most-feared malware threats, got a superficial facelift this week, hiding itself within a fake Microsoft Office request that asks users to update Microsoft Word so that they can take advantage of new features. This revamped presentation could point to internal efforts by threat actors to increase Emotet’s hit rate—a possibility supported by Malwarebytes telemetry … [Read more...]

Tampa Bay Times hit with Ryuk ransomware attack

Florida newspaper The Tampa Bay Times suffered a Ryuk ransomware attack Thursday, making it the latest major victim of the notorious ransomware family that continues to rise in popularity. Curiously, the paper is at least the third Florida-based Ryuk victim in the past year. The attack, which The Tampa Bay Times reported on itself, did not result in any breached data. Sensitive customer … [Read more...]

A week in security (December 23 – 29)

Last week on Malwarebytes Labs, we continued our retrospective coverage with a look at how lawmakers in the United States treated online privacy this year, finding trends in multiple federal bills introduced in the Senate. Then we took a little break for the holidays. Other cybersecurity news: Now an annual tradition for close to a decade, SplashData unveiled this year’s most popular … [Read more...]

A decade in cybersecurity fails: the top breaches, threats, and ‘whoopsies’ of the 2010s

This post was co-authored by Wendy Zamora and Chris Boyd. All opinions expressed belong to your mom. Back in the days before climate change stretched frigid winter months directly into the insta-sweat of summer, there was a saying about March: in like a lamb, out like a lion. The same might be said about the last decade in cybersecurity fails. What kicked off with a handful of stories about … [Read more...]

A week in security (December 9 – 15)

Last week on Malwarebytes Labs, we cautioned readers against purchasing potentially privacy-invasive, cyber-insecure smart doorbells, warned about a new credit card skimmer vulnerability embedded within hundreds of fraudulent web sites selling supposedly name-brand shoes, and looked at the newest veteran’s assistance program launched by the nonprofit Women in CyberSecurity (WiCyS). We also … [Read more...]

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...]

Emotet is back: botnet springs back to life with new spam campaign

After a fairly long hiatus that lasted nearly four months, Emotet is back with an active spam distribution campaign. For a few weeks, there were signs that the botnet was setting its gears in motion again, as we observed command and control (C2) server activity. But this morning, the Trojan started pumping out spam, a clear indication it’s ready to jump back into action. The malicious … [Read more...]

Ransomware continues assault against cities and businesses

Ransomware continues to make waves in the US, forcing multiple cities and organizations into tough choices. Pressed for cash and time, local government organizations are left with few options: Either pay the ransom as soon as possible and encourage criminals to continue bringing essential services to their knees, or refuse and be left with a massive cleanup bill. When a $50,000 ransom becomes … [Read more...]

Trojans, ransomware dominate 2018–2019 education threat landscape

Heading into the new school year, we know educational institutions have a lot to worry about. Teacher assignments. Syllabus development. Gathering supplies. Readying classrooms. But one issue should be worrying school administrators and boards of education more than most: securing their networks against cybercrime. In the 2018–2019 school year, education was the top target for … [Read more...]