±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ - 3% Detection Rate *

Did you just run into a download or a file on your computer that is digitally signed by ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾? Some of the security products refers to the detected files as Malicious and Trojan.MulDrop. The detection rate for the ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ files collected here is 3%. Please read on for more details.

You will probably see ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view additional details from the ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ certificate with the following procedure:

1. Open up Windows Explorer and locate the ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ file
2. Right-click the file and select Properties
3. Click on the Digital Signatures tab
4. Click the View Certificate button

Here's a screenshot of a file digitally signed by ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This implies that the file has been published by ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ and that no one has tampered with the file.

If you click the View Certificate button shown in the screenshot above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also view the address for ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾, such as the street name, city and country.

VeriSign Class 3 Code Signing 2010 CA has issued the ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.

±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ Files

The following are the ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ files I have gathered, thanks to the FreeFixer users.

Scanner and Detection Names

Here is the detection names for the ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ 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 that I've collected 70 scan reports for the ±±¾©Î¢Í¨Ð³ÉÍøÂç¿Æ¼¼ÓÐÏÞ¹«Ë¾ files. 2 of these scan reports came up with some sort of detection. If you like, you can review the full details of the scan results by examining the files listed above.

Analysis Details

The analysis has been done on certificates with the following serial numbers:

• 3f76a7967cb4576c311b13a1bf45a947

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