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How to Create a Malicious Test File (EICAR)

How to Create a Malicious Test File (EICAR)




This document describes how to create a malicious test file (EICAR) for testing purposes in your lab environment. The file is identified as malicious by the Software Reputation Service (SRS).


  1. Open a text editor such as notepad.
  2. Copy/paste the string below. Do not add any other characters, spaces, or return marks in the text file. Additional values will generate a different hash and your test file will not be effective.
  3. Save the document as File extension will have to be .com for Bit9 to analyze the file.

Hash of

SHA-256: 275A021BBFB6489E54D471899F7DB9D1663FC695EC2FE2A2C4538AABF651FD0F  

MD5: 44D88612FEA8A8F36DE82E1278ABB02F 

SHA-1: 3395856CE81F2B7382DEE72602F798B642F14140

Important Note(s)

The content of this file was developed by the European Institute for Computer Antivirus Research. Additional information can be found here:

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