Fileless Malware
N/A
无文件恶意软件
Fileless Malware · N/A · 无文件恶意软件 · FYL-les muh-LWAIR · living in memory · fileless attack · Cybersecurity · malware · memory · threatsCybersecurityliving in memory fileless attack/FYL-les muh-LWAIR/
Also known as: living in memory, fileless attack
Last updated August 9, 2026
Definition
Fileless malware runs mainly in memory or via legitimate tools/scripts, leaving fewer traditional malicious files on disk.
Real-World Example
A malicious PowerShell command pulled from a registry key and executed only in RAM is fileless technique.
References
Related terms
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