Remote Code Execution (RCE) via Archive Exploitation. Primary Vulnerabilities:
Government-backed groups from Russia (e.g., RomCom, UAC-0099) and China (e.g., Amaranth-Dragon), as well as financially motivated cybercriminals. insidous.rar
The "insidious" nature of these RAR files stems from their ability to bypass traditional user caution: Remote Code Execution (RCE) via Archive Exploitation
A path traversal flaw discovered in July 2025 that allows attackers to drop malicious files into sensitive system folders (like the Startup folder) when an archive is opened. UAC-0099) and China (e.g.
Complete system compromise, delivery of RATs (Remote Access Trojans) like Remcos or DarkMe, and theft of funds from financial accounts. Technical Analysis of the Exploitation
A high-severity flaw that spoofed file extensions, hiding executables behind benign names like .jpg or .pdf .