In recent months, CPR has been investigating the usage of compiled V8 JavaScript by malware authors. Compiled V8 JavaScript is a lesser-known feature in V8, Google’s JavaScript engine, that enables the compilation of JavaScript into low-level bytecode.
This technique assists attackers in evading static detections and hiding their original source code, rendering it almost impossible to analyze statically. To statically analyze compiled JavaScript files, Check Point researchers employed a newly-developed custom tool named ”View8”, specifically designed for decompiling V8 bytecode to a high-level readable language. Using View8, they decompiled thousands of malicious compiled V8 applications, spanning various malware types, such as Remote Access Tools (RATs), stealers, miners and even ransomware.
Read more…
Source: Check Point
Related:
- #StopRansomware: Akira Ransomware summary
April 18, 2024
Since March 2023, Akira ransomware has impacted a wide range of businesses and critical infrastructure entities in North America, Europe, and Australia. In April 2023, following an initial focus on Windows systems, Akira threat actors deployed a Linux variant targeting VMware ESXi virtual machines. As of January 1, 2024, the ransomware group has impacted over 250 ...
- SoumniBot: the new Android banker’s unique techniques
April 17, 2024
The creators of widespread malware programs often employ various tools that hinder code detection and analysis, and Android malware is no exception. As an example of this, droppers, such as Badpack and Hqwar, designed for stealthily delivering Trojan bankers or spyware to smartphones, are very popular among malicious actors who attack mobile devices. That said, we ...
- ScrubCrypt Deploys VenomRAT with an Arsenal of Plugins
April 8, 2024
Last year, FortiGuard Labs uncovered the 8220 Gang’s utilization of ScrubCrypt to launch attacks targeting exploitable Oracle WebLogic Servers. ScrubCrypt has been described as an “antivirus evasion tool” that converts executables into undetectable batch files. It offers several options to manipulate malware, making it more challenging for antivirus products to detect. FortiGuard Labs recently discovered a ...
- Byakugan – The Malware Behind a Phishing Attack
April 4, 2024
In January 2024, FortiGuard Labs collected a PDF file written in Portuguese that distributes a multi-functional malware known as Byakugan. The PDF image shows a blurred table and asks the victim to click the malicious link on the PDF file to see the content. Once the link is clicked, a downloader is downloaded. The downloader drops ...
- LazyStealer: Sophisticated does not mean better
April 4, 2024
In the first quarter of 2024, researchers from Positive Technologies Expert Security Center (PT ESC) detected a series of attacks targeting government organizations in Russia, Belarus, Kazakhstan, Uzbekistan, Kyrgyzstan, Tajikistan, and Armenia. The research team could not find any links to known groups that used the same techniques. The main goal of the attack was stealing ...
- New Golang Trojan Installs Certificate for Comms Evasion
March 25, 2024
This week, the Sonicwall Capture Labs threat research team analyzed a new Golang malware sample. It uses multiple geographic checks and publicly available packages to screenshot the system before installing a root certificate to the Windows registry for HTTPS communications to the C2. There is currently no malware family affiliated, but the IP and URL addresses ...