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Category — Digital Certficate
Cybercriminals Combine Phishing and EV Certificates to Deliver Ransomware Payloads

Cybercriminals Combine Phishing and EV Certificates to Deliver Ransomware Payloads

Sep 15, 2023 Ransomware / Cyber Threat
The threat actors behind RedLine and Vidar information stealers have been observed pivoting to ransomware through phishing campaigns that spread initial payloads signed with Extended Validation ( EV ) code signing certificates. "This suggests that the threat actors are streamlining operations by making their techniques multipurpose," Trend Micro researchers  said  in a new analysis published this week. In the incident investigated by the cybersecurity company, an unnamed victim is said to have first received a piece of info stealer malware with EV code signing certificates, followed by ransomware using the same delivery technique. In the past,  QakBot infections  have leveraged  samples signed with valid code signing certificates  to bypass security protections. The attacks start with phishing emails that employ well-worn lures to trick victims into running malicious attachments that masquerade as PDF or JPG images but are actually executables that jum...
Hackers Trick Microsoft Into Signing Netfilter Driver Loaded With Rootkit Malware

Hackers Trick Microsoft Into Signing Netfilter Driver Loaded With Rootkit Malware

Jun 28, 2021
Microsoft on Friday said it's investigating an incident wherein a driver signed by the company turned out to be a malicious Windows rootkit that was observed communicating with command-and-control (C2) servers located in China. The driver, called " Netfilter ," is said to target gaming environments, specifically in the East Asian country, with the Redmond-based firm noting that "the actor's goal is to use the driver to spoof their geo-location to cheat the system and play from anywhere." "The malware enables them to gain an advantage in games and possibly exploit other players by compromising their accounts through common tools like keyloggers," Microsoft Security Response Center (MSRC)  said . It's worth pointing out that Netfilter also refers to a legitimate software package , which enables packet filtering and network address translation for Linux based systems. Microsoft dubbed the malware " Retliften ," alluding to "ne...
5 Reasons Device Management Isn't Device Trust​

5 Reasons Device Management Isn't Device Trust​

Apr 21, 2025Endpoint Security / Zero Trust
The problem is simple: all breaches start with initial access, and initial access comes down to two primary attack vectors – credentials and devices. This is not news; every report you can find on the threat landscape depicts the same picture.  The solution is more complex. For this article, we'll focus on the device threat vector. The risk they pose is significant, which is why device management tools like Mobile Device Management (MDM) and Endpoint Detection and Response (EDR) are essential components of an organization's security infrastructure. However, relying solely on these tools to manage device risk actually creates a false sense of security. Instead of the blunt tools of device management, organizations are looking for solutions that deliver device trust . Device trust provides a comprehensive, risk-based approach to device security enforcement, closing the large gaps left behind by traditional device management solutions. Here are 5 of those limitations and how to ov...
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