Threat Description

Virus: ​DOS/Rogue


Category: Malware
Type: Virus
Platform: DOS
Aliases: Virus:​DOS/Rogue


Virus:DOS/Rogue (also known as Peligro) infects COM and EXE files when they are executed. There are several variants, most of them sized around 1200 bytes.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details


Rogue turns off VSAFE protections while infecting files. Unlike most other viruses, Rogue turns the protection back on after infection is done. It also deletes MSAV's CHKLIST.MS files. Rogue has stealth features, as it is able to hide the size increase of infected files when the user attempts to view the file using the DIR command.


Rogue activates on the 14th of March. On this date it corrupts DBF database files when they are accessed and randomly reboots the PC.


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