How ransomware operators try to stay under the radar

An often heard remark is that when your security solution notices a ransomware attack, it’s already too late. Theres a lot of truth in that, if you consider the encryption process to be the ransomware attack. However, these days encryption is just a part of many ransomware attacks. Some of the...

New Python-Based Fileless Malware Named ‘PyLoose’ Targeting Cloud Environments

Threat Level Attack Report For a detailed threat advisory, download the pdf file here Summary A new fileless attack called PyLoose targets cloud workloads by loading an XMRig Miner directly into memory using Python code and the memfd technique. This evasive attack highlights the need for advanced...

PyLoose: Python-based fileless malware targets cloud workloads to deliver cryptominer

PyLoose is a newly discovered Python-based fileless malware targeting cloud workloads. Get a breakdown of how the attack unfolds and the steps to mitigate it...

Webinar recap: EDR vs MDR for business success

Did you miss our recent webinar on EDR vs. MDR? Don't worry, we've got you covered! In this blog post, we'll be recapping the highlights and key takeaways from the webinar hosted by Marcin Kleczynski, CEO and co-founder of Malwarebytes, and featuring guest speaker Joseph Blankenship, Vice Preside...

Upcoming webinar: Is EDR or MDR better for your business?

Don't miss our upcoming webinar on EDR vs. MDR! In the webinar, Marcin Kleczynski, CEO and co-founder of Malwarebytes, and guest speaker Joseph Blankenship, Vice President and research director at Forrester, discuss topic such as: The difference between EDR and MDR, how EDR solutions can be...

Silence is golden partner for Truebot and Clop ransomware

A recent rise in the number of Truebot infections has been attributed to a threat actor known as the Silence Group. The Silence Group is an initial access broker IAB that frequently changes tools and tactics to stay on top of the game. An IAB's primary task is to find a weakness or vulnerability,...

Cryptojackers growing in numbers and sophistication

With rising energy costs and increased volatility in the value of cryptocurrencies, we were bound to see a rise in malicious cryptomining, aka cryptojacking. If you dont know whether you will ever see a return on your investments in mining equipment, one will look for other opportunities. But if...

IT threat evolution Q2 2022

IT threat evolution in Q2 2022 IT threat evolution in Q2 2022. Non-mobile statistics IT threat evolution in Q2 2022. Mobile statistics Targeted attacks New technique for installing fileless malware Earlier this year, we discovered a malicious campaign that employed a new technique for installing...

This New Fileless Malware Hides Shellcode in Windows Event Logs

A new malicious campaign has been spotted taking advantage of Windows event logs to stash chunks of shellcode for the first time in the wild. "It allows the 'fileless' last stage trojan to be hidden from plain sight in the file system," Kaspersky researcher Denis Legezo said in a technical write-...

Attackers Use Event Logs to Hide Malware

Researchers have discovered a malicious campaign utilizing a never-before-seen technique for quietly planting fileless malware on target machines. The technique involves injecting shellcode directly into Windows event logs. This allows adversaries to use the Windows event logs as a cover for...

A new secret stash for “fileless” malware

In February 2022 we observed the technique of putting the shellcode into Windows event logs for the first time "in the wild" during the malicious campaign. It allows the "fileless" last stage Trojan to be hidden from plain sight in the file system. Such attention to the event logs in the campaign...

Staging a Quack: Reverse Analyzing a Fileless QAKBOT Stager

We analyzed a fileless QAKBOT stager possibly connected to the recently reported Squirrelwaffle campaign...

‘DarkWatchman’ RAT Shows Evolution in Fileless Malware

A novel remote access trojan RAT being distributed via a Russian-language spear-phishing campaign is using unique manipulation of Windows Registry to evade most security detections, demonstrating a significant evolution in fileless malware techniques. Dubbed DarkWatchman, the RAT – discovered by...

A week in security (Oct 25 – Oct 31)

Last week on Malwarebytes Labs Beyond the VPN: Ultimate online privacy with the Tor Project’s Isabela Bagueros: Lock and Code S02E20 Patch now to bypass Firefox add-ons that abuse the proxy API to deny updates How social media mistakes can impact cybersecurity Update now! Apple patches bugs in iO...

APT10: sophisticated multi-layered loader Ecipekac discovered in A41APT campaign

Why is the campaign called A41APT? In 2019, we observed an APT campaign targeting multiple industries, including the Japanese manufacturing industry and its overseas operations, that was designed to steal information. We named the campaign A41APT not APT41 which is derived from the host name...

Malware Loader Abuses Google SEO to Expand Payload Delivery

The Gootloader malware loader, previously used for distributing the Gootkit malware family, has undergone what researchers call a “renaissance” when it comes to payload delivery. New research released this week paints Gootloader as an increasingly sophisticated loader framework, which has now...

Adaptive protection against invisible threats

Corporate endpoint security technologies for mid-sized companies struggle to surprise us with anything brand new. They provide reliable protection against malware and, when combined with relevant policies, regular updates, and employee cyberhygiene, they can shield a business from a majority of...

Fileless Malware Tops Critical Endpoint Threats for 1H 2020

In the first half of 2020, the most common critical-severity cybersecurity threat to endpoints was fileless malware, according to a recent analysis of telemetry data from Cisco. Fileless threats consist of malicious code that runs in memory after initial infection, instead of files being stored o...

Riding another wave of success for our multi-layered detection and response approach

The corporate endpoint is a constant battle between cybersecurity white hats and criminal attackers. According to one study from the Ponemon Institute, 68% of organizations were victims of an attack on the endpoint in 2019. The risks and costs associated with undetected threats are immeasurable...

Behavioral blocking and containment: Transforming optics into protection

In today’s threat landscape—overrun by fileless malware that live off the land, highly polymorphic threats that mutate faster than traditional solutions can keep up with, human-operated attacks that adapt to what adversaries find on compromised machines, and other sophisticated threats—behavioral...