Koshy John - 1.4% Detection Rate *

Did you just download a file that has a digital signature from Koshy John and wonder if the file is safe? If that's the case, please read on.

You will probably notice Koshy John when clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the additional details from the Koshy John digital signature with the following steps:

1. Open up Windows Explorer and locate the Koshy John file
2. Right-click on the file and select Properties
3. Click the Digital Signatures tab
4. Click the View Certificate button

Here is a screenshot of a file signed by Koshy John:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This means that the file has been published by Koshy John and that no one has tampered with the file.

If you click the View Certificate button shown in the screenshot above, you can examine all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also see the address for Koshy John, such as the street name, city and country.

COMODO RSA Code Signing CA and COMODO Code Signing CA 2 has issued the Koshy John certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screengrab above.

Koshy John Files

These are the Koshy John files I've gathered, thanks to the FreeFixer users.

Scanner and Detection Names

Here's the detection names for the Koshy John files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.

* How the Detection Percentage is Calculated

The detection percentage is based on the fact that I have gathered 218 scan reports for the Koshy John files. 3 of these scan results came up with some sort of detection. You can view the full details of the scan results by examining the files listed above.

Analysis Details

The analysis is based on certificates with the following serial numbers:

• 00f0b9668b8f9b11a925e079e486f78db1
• 00bc24c4bcb04e1fa78acb00f3f0335f11

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