Threat description


Category: Malware
Type: Virus
Platform: W32
Aliases: Utter, TrojanDropper.DOS.Utter


F-Secure Anti-Virus detects a third party installation package as TrojanDropper.DOS.Utter as it was used to spread infected files in the past. But there exist a few innocent files packed with this installation package that are detected as well (for example a Mario game that is 66055 bytes long).

The original infected installation package size was 341211 bytes and it contained Win32.HLLP.Yai virus.


Automatic action

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


More information on 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 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.


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