Threat Description



Aliases: Other:​W32/Zone.Identifier.Identifier, Zone.Identifier
Category: Malware
Type: Other
Platform: W32


A program which does not easily fit into any other malware category.


Automatic action

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


Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

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

Technical Details

Other:W32/Zone.Identifier is a stream generated by Microsoft Internet Explorer and Outlook when saving files to the local disk from different security zones. It is not a malicious program. We do get occasional enquiries about this issue as many Windows XP files have an invisible stream by this name. The typical content of such file would be:

  • [ZoneTransfer] ZoneId=3

Existence of Zone.Identifier stream on some files is normal, and as such is of not a cause for concern.


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