New EggStreme Malware With Fileless Capabilities Leverages DLL Sideloading to Execute Payloads

A previously unknown advanced persistent threat (APT) group has unleashed a new fileless malware framework, dubbed EggStreme, in a highly targeted espionage campaign against strategic organizations. Emerging in early 2024, EggStreme exploits the legitimate Windows Mail executable (WinMail[.]exe) to sideload a malicious library, allowing attackers to achieve in-memory code execution without writing decrypted payloads to […]

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