Threat Description

nul

Details

Aliases: nul, prn, lpt1, clock$
Category: Malware
Type:
Platform: W32

Summary



This is not a virus. Actually, the typical support query goes like this:

Question: I found a file called "nul" in my root directory. I can not access or delete it. Later I found it existed in each and every directory! This has to be a virus!

Answer: How did you find it? With which program?

Try locating in a same manner files with names such as "lpt1", "prn", "com1", "clock$" and you will see that they too exist in every directory and can not be accessed or deleted. This is normal and is a feature of DOS.

These are virtual names for system devices: prn for printer, nul for null port, clock$ for CMOS memory etc. Ignore them.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.








Description Created: Mikko Hypponen, F-Secure


SUBMIT A SAMPLE

Suspect a file or URL was wrongly detected? Submit a sample to our Labs for analysis

Submit Now

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

Learn More