Once detected, the F-Secure security product may either automatically disinfect the suspect file or prompt the user to select a desired action. For more information, see: Support Community article: Automatic actions for viruses also used for suspicious items.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.
As hidden items are often related to malware, we ask that you consider sending us a sample of the hidden files to F-Secure Labs via the Submit A Sample (SAS) page for further analysis.
Since the files are hidden, you might not be able to access them directly. To access the files, you might need to do one of the following:
Alternatively, if the hidden files are related to the Master Boot Record (MBR), you may use the following instructions:
Caution: Manual disinfection of the MBR is only advisable for advanced users.
Microsoft provides tools to replace an infected MBR with a copy of the original, clean MBR. To do so:
Note: For further information on use of the 'fixmbr' command, please refer to the relevant Microsoft documentation.
F-Secure products may detect the rootkit file itself using the detection names Rootkit.MBR.Whistler.A (boot image) or Rootkit.MBR.Whistler.B (boot image).
As with most rootkits, Whistler is used to help other malicious programs to silently launch themselves on an infected computer. The additional files loaded by the rootkit are stored in the raw disk sectors and are therefore not visible in the file system. These files, which are typically malware, may also be identified by detections such as Gen:Variant.Unruy.4.