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Spelevo exploit kit debuts new social engineering trick

2019 has been a busy year for exploit kits, despite the fact that they haven’t been considered a potent threat vector for years, especially on the consumer side. This time, we discovered the Spelevo exploit kit with its virtual pants down, attempting to capitalize on the popularity of adult websites to compromise more devices. The current Chromium-dominated browser market share favors … [Read more...]

Exploit kits: fall 2019 review

Despite a slim browser market share, Internet Explorer is still being exploited in fall 2019 in a number of drive-by download campaigns. Perhaps even more surprising, we’re seeing new exploit kits emerge. Based on our telemetry, these drive-bys are happening worldwide (with the exception of a few that are geo-targeted) and are fueled by malvertising most often found on adult … [Read more...]

A week in security (July 29 – August 4)

Last week on Malwarebytes Labs we discussed the security and privacy changes in Android Q, how to get your Equifax money and stay safe doing it, and we looked at the strategy of getting a board of directors to invest in government cybersecurity. We also reviewed how a Capital One breach exposed over 100 million credit card applications, analyzed the exploit kit activity in the summer of 2019, and … [Read more...]

Say hello to Lord Exploit Kit

Just as we had wrapped up our summer review of exploit kits, a new player entered the scene. Lord EK, as it is calling itself, was caught by Virus Bulletin‘s Adrian Luca while replaying malvertising chains. In this blog post, we do a quick review of this exploit kit based on what we have collected so far. Malwarebytes users were already protected against this attack. Exploit kit or … [Read more...]

GreenFlash Sundown exploit kit expands via large malvertising campaign

Exploit kit activity has been relatively quiet for some time, with the occasional malvertising campaign reminding us that drive-by downloads are still a threat. However, during the past few days we noticed a spike in our telemetry for what appeared to be a new exploit kit. Upon closer inspection we realized it was actually the very elusive GreenFlash Sundown EK. The threat actors behind it … [Read more...]

Electrum Bitcoin wallets under siege

By Adam Thomas, with additional contributions from Jérôme Segura, Vasilios Hioueras and S!Ri Since at least late December 2018, many users of the popular Electrum Bitcoin wallet have fallen victim to a series of phishing attacks, which we estimate netted crooks well over 771 Bitcoins—an amount equivalent to approximately $4 million USD at current exchange rates. Threat actors were able to … [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...]

A week in security (December 17 – 23)

Last week on Labs we looked at Fuchsia OS as a possible alternative for Android, explained all the reasons why cybercriminals want to hack your phone, discussed a flaw in Twitter form that may have been abused by nation states, gave you a Christmas tech scams roundup, revealed why many online quizzes qualify as phishing scams, gave some tips about safely using those smart speakers you got for … [Read more...]

Exploit kits: fall 2018 review

Exploit kit (EK) activity continues to surprise us as the weather cools, the leaves change, and we move into the fall of 2018. Indeed, shortly after our summer review, a new exploit kit was discovered, and while no new vulnerabilities were added to the current EKs, several malvertising chains are still going strong. Smoke Loader, Ramnit, and AZORult are some of the most common payloads we’ve … [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...]