Win32.AutoRun.fag malware detection
File type: Dangerous and malicious file
Win32.AutoRun.fag is a malware detection name associated with files using the .fag file extension. Antivirus software identifies it as malicious software related to the Win32 AutoRun threat.
It is not a legitimate document or application format intended for normal user access.
File type category:
Dangerous and malicious file
Date updated: October 11, 2026
The name Win32.AutoRun.fag is used by antivirus products for a malicious Windows file. It has been associated with a worm or backdoor virus and is labeled by several antivirus companies.
There is no known legitimate file format or standard application associated with this extension. A file with this name may be a file created or used by malware, rather than an independent format with documented contents or a normal relationship to other software files.
Avast Antivirus, ESET NOD32 Antivirus, and AVG Antivirus for Microsoft Windows can identify this type of threat. The detection name is intended for security software and is not evidence that the file belongs to a supported Windows application.
Do not try to open a .fag file manually. Scan it with an up-to-date installation of Avast Antivirus, ESET NOD32 Antivirus, or AVG Antivirus on Microsoft Windows.
Follow the antivirus program's instructions to quarantine or remove the detected file.
A Win32.AutoRun.fag file should not be converted. It is a malware detection rather than a legitimate interchange format, and conversion could expose the system to the malicious file without producing a useful result.
Software applications that handle other tasks involving fag files:
Microsoft Windows
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