EICAR Standard Anti-Virus Test File Valid HTML 4.01 Transitional Valid CSS Valid SVG 1.0

Me, myself & IT

EICAR Standard Anti-Virus Test File

Background Information
Alternative Formats
Authenticity and Integrity
Automatic online installation
Manual offline installation


The setup script EICAR.INF creates

Background Information

EICAR logo The anti-virus test file EICAR.COM is a 16-bit real mode DOS program that prints the text
upon execution. Its binary code
is a pure ASCII text of 68 bytes length which should be detected by every anti-virus program.

Alternative Formats

The EICAR anti-virus test file can also be created directly by current WWW browsers through data URLs in the following file formats:

Authenticity and Integrity

EICAR.CAB is digitally signed using an X.509 certificate issued by WEB.DE TrustCenter E-Mail Certification Authority.
Serial number of the certificate
0x04605052 = 73420882
Fingerprint of the certificate
MD5: e5 0b 01 66 ce 2e 7a 03 f4 98 39 37 f6 f9 9f ba
SHA-1: 79 05 5d 63 2f 03 31 83 04 e2 ff 3b 25 b9 cc b6 70 ad ec 31
Download and install the CA and root X.509 certificates of WEB.DE to validate and verify the digital signature.

Note: unfortunately WEB.DE abandoned their trust center in 2018 and removed all pages and download links in 2019; fortunately the Wayback Machine archived the TrustCenter page, the CA and the root certificate.

Note: due to its counter signature alias timestamp the digital signature remains valid past the X.509 certificates expiration date!


The shortcut icon EICAR.ICO and the setup script EICAR.INF are packaged in the (compressed and digitally signed) cabinet file EICAR.CAB.


Installation requires no administrative privileges and access rights.

Automatic online installation

When visited with Internet Explorer, this web page will prompt to install (the contents of) the package using Internet Component Download.

Manual offline installation

Download the package EICAR.CAB and verify its digital signature, then open it in Windows Explorer, extract its contents, right-click the extracted setup script EICAR.INF to display its context menu and click Install to run the installation.

Note: on Windows Vista and newer versions of Windows NT, InfDefaultInstall.exe, the application registered for the Install verb of *.inf files, requests administrative privileges.


Not provided.


If you miss anything here, have additions, comments, corrections, criticism or questions, want to give feedback, hints or tipps, report broken links, bugs, deficiencies, errors, inaccuracies, misrepresentations, omissions, shortcomings, vulnerabilities or weaknesses, …: don’t hesitate to contact me and feel free to ask, comment, criticise, flame, notify or report!

Use the X.509 certificate to send S/MIME encrypted mail.

Note: email in weird format and without a proper sender name is likely to be discarded!

I dislike HTML (and even weirder formats too) in email, I prefer to receive plain text.
I also expect to see your full (real) name as sender, not your nickname.
I abhor top posts and expect inline quotes in replies.

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