Dropbox, Inc - 0.021% Detection Rate *

Did you just download a file that is digitally signed by Dropbox, Inc and wonder if the file is safe? If that's the case, please read on.

You will probably see Dropbox, Inc when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

Screenshot where Dropbox, Inc appears as the verified publisher in the UAC dialog

You can also view the Dropbox, Inc certificate with the following procedure:

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

Here's a screenshot of a file that has been digitally signed by Dropbox, Inc:

Screenshot of the Dropbox, Inc certificate

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 Dropbox, Inc and that the file has not been tampered with.

If you click the View Certificate button shown in the screenshot above, you can view 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 see the address for Dropbox, Inc, such as the street name, city and country.

DigiCert Assured ID Code Signing CA-1 and DigiCert SHA2 Assured ID Code Signing CA has issued the Dropbox, Inc certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.

Dropbox, Inc Files

The following are the Dropbox, Inc files I've gathered, thanks to the FreeFixer users.

The FreeFixer tool treats files from Dropbox, Inc as trusted, which means that the Dropbox, Inc files will appear with a green background and that there is no removal checkbox for the file. However, as you can see in the scan results below, a few of the anti-virus scanners detects the Dropbox, Inc file(s). I'm pretty sure those detections are false positives and that the files are safe. It is unlikely that Dropbox, Inc would ship a malware file.

Detection RatioFile Name
2/57DropboxCrashHandler.exe
1/65_multiprocessing.pyd
1/62sip.pyd
0/55QtWebEngineProcess.exe
0/56DropboxUpdate.exe
0/57DbxSvc.exe
0/57dbxsv%USERNAME%.exe
0/55DropboxExt64.24.dll
0/56DropboxUpdate.exe
0/55dbxsvc.exe
0/57DropboxExt64.25.dll

Scanner and Detection Names

Here's the detection names for the Dropbox, Inc files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.

As mentioned above, I think these detections are incorrect since it is very unlikely that Dropbox, Inc would ship a malware file.

ScannerDetection Names
JiangminAdware/Agent.zuu
TencentSuspicious.Heuristic.Gen.b.0
TrendMicro-HouseCallSuspicious_GEN.F47V0508
YandexTrojan.Razy!

* How the Detection Percentage is Calculated

The detection percentage is based on the fact that I have collected 19236 scan results for the Dropbox, Inc files. 4 of these scan results came up with some sort of detection. You can view the full details of the scan reports by examining the files listed above.

Analysis Details

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

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