Attention: We have transitioned to a new AAD or Microsoft Entra ID from the week of May 20, 2024. In case your tenant requires admin consent, please refer to this document located at Overview of user and admin consent - Microsoft Entra ID | Microsoft Learn and grant access to App ID: 6ba09155-cb24-475b-b24f-b4e28fc74365 with graph permissions for Directory.Read.All and User.Read for continued access. While the app may appear unverified, you can confirm its legitimacy by verifying the App ID provided.

We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names

Published Jan 10, 2005 | Updated Sep 05, 2017

Learn about other threats

Virus:DOS/EICAR_Test_File

Detected by Microsoft Defender Antivirus

Aliases: EICAR (Wild List ORG) EICAR-Test-File (not a virus) (BitDefender) EICAR Test String (CA) Eicartest (ESET) Eicar_test_file (Frisk (F-Prot)) EICAR-Test-File (Kaspersky) EICAR-AV-Test (Sophos) Eicar_test_file (Trend Micro)

Summary

This file is not malicious.

It's used to check that your security software is working properly.

If you downloaded this file and continue to get warnings from your security software about it, you can manually delete or remove it.

Some security software might put this file on your PC to test that it's working correctly. If you have multiple security software installed, you may encounter errors as they all try to clean the same file.

If you downloaded this file and continue to get warnings about it, you can manually delete or remove it.

Virus:DOS/EICAR_Test_File

Summary

What to do now

Technical information

Threat behavior

Additional information

Prevention

Symptoms