Multiple Russia-aligned threat actors, including SHADOW-EARTH-066 and Earth Dahu, are actively exploiting a patched WinRAR path traversal vulnerability (CVE-2025-8088) to target Ukrainian organizations. The attackers use crafted RAR archives with NTFS Alternate Data Streams to silently drop malicious payloads, such as the evolved GIFTEDCROOK infostealer or HTA-based espionage tools, into the Windows Startup folder and ProgramData directories.
SHADOW-EARTH-066
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Old WinRAR Flaw Fuels Attacks on Ukraine: How Unmanaged Software Keeps the Door Open