Researchers Shed Light on CatB Ransomware's Evasion Techniques

The threat actors behind the CatB ransomware operation have been observed using a technique called DLL search order hijacking to evade detection and launch the payload. CatB, also referred to as CatB99 and Baxtoy, emerged late last year and is said to be an "evolution or direct rebrand" of anothe...

Emotet Rises Again: Evades Macro Security via OneNote Attachments

The notorious Emotet malware, in its return after a short hiatus, is now being distributed via Microsoft OneNote email attachments in an attempt to bypass macro-based security restrictions and compromise systems. Emotet, linked to a threat actor tracked as Gold Crestwood, Mummy Spider, or TA542,...

Emotet Rises Again: Evades Macro Security via OneNote Attachments

The notorious Emotet malware, in its return after a short hiatus, is now being distributed via Microsoft OneNote email attachments in an attempt to bypass macro-based security restrictions and compromise systems. Emotet, linked to a threat actor tracked as Gold Crestwood, Mummy Spider, or TA542,...

A week in security (March 13 - 19)

Last week on Malwarebytes Labs: "Brad Pitt," a still body, ketchup, and a knife, or the best trick ever played on a romance scammer, with Becky Holmes: Lock and Code S04E06 Breast cancer photos published by ransomware gang WhatsApp refuses to weaken encryption, would rather leave UK "Just awful"...

S4x23 Review Part 3: Healthcare Cybersecurity Sessions

This article focuses on the healthcare sector. Over the past two years, the healthcare sector has been in a constant state of emergency due to the COVID-19 pandemic, and as widely reported in the media, it has also been threatened by cyberattacks such as ransomware...

LockBit 3.0 Ransomware: Inside the Cyberthreat That's Costing Millions

U.S. government agencies have released a joint cybersecurity advisory detailing the indicators of compromise IoCs and tactics, techniques, and procedures TTPs associated with the notorious LockBit 3.0 ransomware. "The LockBit 3.0 ransomware operations function as a Ransomware-as-a-Service RaaS...

LockBit 3.0 Ransomware: Inside the Cyberthreat That's Costing Millions

U.S. government agencies have released a joint cybersecurity advisory detailing the indicators of compromise IoCs and tactics, techniques, and procedures TTPs associated with the notorious LockBit 3.0 ransomware. "The LockBit 3.0 ransomware operations function as a Ransomware-as-a-Service RaaS...

Threat Roundup for March 10 to March 17

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between March 10 and March 17. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral...

FakeCalls Vishing Malware Targets South Korean Users via Popular Financial Apps

An Android voice phishing aka vishing malware campaign known as FakeCalls has reared its head once again to target South Korean users under the guise of over 20 popular financial apps. "FakeCalls malware possesses the functionality of a Swiss army knife, able not only to conduct its primary aim b...

Rubrik is latest victim of the Clop ransomware zero-day campaign

Rubrik, a cybersecurity company specializing in cloud data management, has revealed that some of its systems were infiltrated by the Clop ransomware group. Rubrik is one of many companies attacked by Clop via an infamous zero-day vulnerability in the GoAnywhere file transfer software. The attack...

LockBit ransomware attacks Essendant

The LockBit ransomware group is claiming responsibility for taking down a US-based distributor of office products called Essendant. This attack, which is said to have begun on or around March 6, created severe ramifications for the organisation, disrupting freight carrier pickups, online orders,...

BianLian ransomware ramps up data-leak extortion and improves operational security

Threat Level Attack Report For a detailed threat advisory, download the pdf file here Summary BianLian ransomware group is ramping up data-leak extortion to extract payments, using similar tactics & a custom backdoor, and bringing 30 new C2 servers online monthly. To receive real-time threat...

Threat Source newsletter (March 16, 2023) — A deep dive into Talos' work in Ukraine

Welcome to this weeks edition of the Threat Source newsletter. Were written a ton about Cisco Talos support of Ukraine and our friends and allies there. Now, we encourage you to watch and listen to the folks who have been working hands-on there. The latest episode of ThreatWise TV from Hazel Burt...

Emotet adopts Microsoft OneNote attachments

Last week, Emotet returned after a three month absence when the botnet Epoch 4 started sending out malicious emails with malicious Office macros. While the extracted attachments were inflated to several hundred megabytes, it was surprising to see that Emotet persisted in using the same attack...

Join us at Microsoft Secure to discover the latest security solutions

Microsoft Secure is our first flagship event designed just for security professionals. On March 28, 2023, we will bring together security professionals from around the world to explore security information and event management SIEM and extended detection and response XDR, threat intelligence, AI,...

Chinese and Russian Hackers Using SILKLOADER Malware to Evade Detection

Threat activity clusters affiliated with the Chinese and Russian cybercriminal ecosystems have been observed using a new piece of malware that's designed to load Cobalt Strike onto infected machines. Dubbed SILKLOADER by Finnish cybersecurity company WithSecure, the malware leverages DLL...

#StopRansomware: LockBit 3.0

Actions to take today to mitigate cyber threats from ransomware: 1. Prioritize remediating known exploited vulnerabilities. 2. Train users to recognize and report phishing attempts. 3. Enable and enforce phishing-resistant multifactor authentication...

Hackers threaten to leak STALKER 2 assets if devs don’t heed demands

Ukrainian game developer GSC Game World has announced it was breached by Russian hacktivists who stole assets related to the much-awaited game STALKER 2: Heart of Chernobyl. A message from GSC Game World team pic.twitter.com/rqRM0tFZmO -- S.T.A.L.K.E.R. OFFICIAL @stalkerthegame March 12, 2023...

Ransomware attack hits ANOTHER school

In what is likely Vice Society's handiwork, the UK's largest state boarding school Wymondham College has announced it has become the victim of a "sophisticated cyberattack". The school didn't provide additional information, but Jonathan Taylor, chief of the school's parent company Sapientia...

Staying Ahead of Ransomware Threats

Ransomware attacks have become a growing threat to organizations of all sizes and sectors. Many of these attacks exploit known vulnerabilities, making organizations need to quickly identify and fix these weaknesses to prevent a potential ransomware incident. This is where the Ransomware...