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:
- Microsoft reveals GoldMax, Sibot and GoldFinder new malware strains used by SolarWinds hackers
March 4, 2021
Microsoft has revealed information on newly found malware the SolarWinds hackers deployed on victims’ networks as second-stage payloads. The company now tracks the “sophisticated attacker” who used the Sunburst backdoor and Teardrop malware during the SolarWinds supply-chain attack as Nobelium. Security researchers with the Microsoft Threat Intelligence Center (MSTIC) and the Microsoft 365 Defender Research Team found ...
- New Sunshuttle Second-Stage Backdoor Uncovered Targeting U.S.-Based Entity; Possible Connection to UNC2452
March 4, 2021
Mandiant Threat Intelligence discovered a new backdoor uploaded by a U.S.-based entity to a public malware repository in August 2020 that we have named SUNSHUTTLE. SUNSHUTTLE is written in GO, and reads an embedded or local configuration file, communicates with a hard-coded command and control (C2) server over HTTPS, and supports commands including remotely uploading ...
- Compromised Website Images Camouflage ObliqueRAT Malware
March 2, 2021
The ObliqueRAT malware is now cloaking its payloads as seemingly-innocent image files that are hidden on compromised websites. The remote access trojan (RAT), which has been operating since 2019, spreads via emails, which have malicious Microsoft Office documents attached. Previously, payloads were embedded into the documents themselves. Now, if users click on the attachment, they’re redirected ...
- Ryuk Ransomware: Now with Worming Self-Propagation
March 2, 2021
A new version of the Ryuk ransomware is capable of worm-like self-propagation within a local network, researchers have found. The variant first emerged in Windows-focused campaigns earlier in 2021, according to the French National Agency for the Security of Information Systems (ANSSI). The agency said that it achieves self-replication by scanning for network shares, and then ...
- Accellion FTA Zero-Day Attacks Show Ties to Clop Ransomware, FIN11
February 22, 2021
Researchers have identified a set of threat actors (dubbed UNC2546 and UNC2582) with connections to the FIN11 and the Clop ransomware gang as the cybercriminal group behind the global zero-day attacks on users of the Accellion legacy File Transfer Appliance product. Multiple Accellion FTA customers, including the Jones Day Law Firm, Kroger and Singtel, have all ...
- The State Of Ransomware, 2020’s Catch-22
February 3, 2021
A ransomware infection can put organizations in difficult situations. The damage that WannaCry and Petya have caused has made people more wary, leading to stricter and more consistent security measures against a constant threat. Developments in ransomware over the past year have made dealing with ransomware not only difficult but also a delicate matter. Aside ...