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:
- Suspected Kimsuky (APT-Q-2) attacks South Korean companies
April 11, 2025
Kimsuky, alias Mystery Baby, Baby Coin, Smoke Screen, Black Banshe, etc., is tracked internally by Qi’anxin as APT-Q-2. The APT group was publicly disclosed in 2013, with attack activity dating as far back as 2012. Kimsuky’s main target for attacks has been South Korea, involving defense, education, energy, government, healthcare, and think tanks, with a focus ...
- GOFFEE continues to attack organizations in Russia
April 10, 2025
GOFFEE is a threat actor that first came to our attention in early 2022. Since then, Kaspersky researchers have observed malicious activities targeting exclusively entities located in the Russian Federation, leveraging spear phishing emails with a malicious attachment. Starting in May 2022 and up until summer of 2023, GOFFEE deployed modified Owowa (malicious IIS module) in ...
- How ToddyCat tried to hide behind AV software
April 7, 2025
To hide their activity in infected systems, APT groups resort to various techniques to bypass defenses. Most of these techniques are well known and detectable by both EPP solutions and EDR threat-monitoring and response tools. In early 2024, while investigating ToddyCat-related incidents, Kaspersky researchers detected a suspicious file named version.dll in the temp directory on multiple ...
- TookPS: DeepSeek isn’t the only game in town
April 2, 2025
In early March, we published a study detailing several malicious campaigns that exploited the popular DeepSeek LLM as a lure. Subsequent telemetry analysis indicated that the TookPS downloader, a malware strain detailed in the article, was not limited to mimicking neural networks. Kaspersky researchers identified fraudulent websites mimic official sources for remote desktop and 3D modeling ...
- The Espionage Toolkit of Earth Alux: A Closer Look at its Advanced Techniques
March 31, 2025
The Earth Alux APT group’s schemes and tactics have been uncloaked through our relentless monitoring and investigation efforts. The China-linked intrusion set is actively launching cyberespionage attacks against the government, technology, logistics, manufacturing, telecommunications, IT services, and retail sectors. The first sighting of its activity was in the second quarter of 2023; back then, it was ...
- MoDiRAT Malware Uses Horus Protector to Target France
March 25, 2025
The SonicWall Capture Labs threat research team has identified a new development in the Horus Protector distributed infection chain. Recently, it has been targeting the French region with MoDiRAT, a malware notorious for stealing credit card and other victim information. During the infection process, it deploys the DarkCloud stealer; however, before exiting, the loader verifies if ...