Norton Firewall Alert: "Dropbox 49.4.69 does not have a valid digital signature." Can someone please help with this? I don't understand what's going on.

Users that reported this issue through support tickets have mentioned that after reinstalling the latest versions of their antivirus, as well as the Dropbox desktop application, the message doesn't appear anymore and the issue is resolved. Please try with this and let us know if it's not the case for you. Please also let us know what are the versions you're using. Thanks!

Dropbox conflicting with Anti virus (Norton/Sophos)

26 Replies

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RichMath
New member | Level 2
8 years ago
I just received a warning from Norton as Dropbox tried to auto-download the update (4/11/2018 @ 14:23 Eastern Time). Here's the warning:

"Dropbox 4.4.74 Installer does not have a valid digital signature"

d.dropbox.com (IP address 162.125.32.135) is the source of the attempted download.
Jane
Dropbox Staff
8 years ago
Hey UR1ofTHEM, welcome to the Dropbox Forum & thanks for checking in with us regarding this question, I hope you’re having a great week so far!

Just as a point of reference, you may keep in mind that sometimes antivirus programs will pick up partial files in your ".dropbox.cache" folder as false positives and continuously quarantine them.

The Dropbox desktop client uses the ".dropbox.cache" folder as a staging area to download your files in small chunks.

To bypass this behavior, I would recommend adding the Dropbox cache folder to an ignore list so that Dropbox can correctly sync that file and/or temporarily disabling your antivirus. Once synced, you should no longer see these warnings or quarantine messages.

If you run a very quick search on google, you’ll also be able to locate this set of steps in regards to your Antivirus, so as to resolve this issue as soon as possible.

Hopefully this is helpful to you, though I’m always here if you have further questions, so please keep me updated on this discussion if you need further clarifications. Thanks again & happy Monday!
CagleTech
Explorer | Level 4
8 years ago
I have the same situation as UR1ofTHEM. The file in question is not in the cache. It is in the path C:\Program Files (x86)\Dropbox\Update\Install\{06CD02FF-6D05-4F19-B801-C267B1180070}

I suspect it may very well be a legitimate file/update to the Dropbox Program, or it could be a trojan ransomware virus monster from hell. How do I confirm through Dropbox.com, or wherever, if it's legitimate.
Jane
Dropbox Staff
8 years ago
Thanks for keeping me updated on the progress here CagleTech!

We’re currently looking into the behavior you’re experiencing internally & I’ll make sure to get back in touch with you here once I have more info on my end. Based on your description, the quarantined file resides in the Update folder & it should be relevant to the latest Stable Dropbox version (49.4.69), therefore it's not malicious.

If I were in your shoes, I’d disable, or uninstall Norton while the upgrade goes through, and then re-enable it afterwards.

Meanwhile, have you contacted Norton’s support team on the issue by any chance (as the error message is on their end)?

Please do let me know how the steps above work for you in your next reply & I'll make sure to get back in touch as quickly as possible!
pjw73nh
New member | Level 2
8 years ago
For what it's worth, I submitted this file to VIRUSTOTAL.COM and it came back clean.

No engines detected this file
SHA-256 803c20e7423bcea5b6961ae760a31ecbfb6144c5c2016bc60daafae9b86392d7
File name DropboxClient_49.4.69.exe
File size 108.93 MB
Last analysis 2018-05-15 19:59:25 UTC
UR1ofTHEM
Helpful | Level 5
8 years ago
pjw73nh wrote:

For what it's worth, I submitted this file to VIRUSTOTAL.COM and it came back clean.

No engines detected this file
SHA-256 803c20e7423bcea5b6961ae760a31ecbfb6144c5c2016bc60daafae9b86392d7
File name DropboxClient_49.4.69.exe
File size 108.93 MB
Last analysis 2018-05-15 19:59:25 UTC

Thanks for this help.
UR1ofTHEM
Helpful | Level 5
8 years ago
CagleTech wrote:

I have the same situation as UR1ofTHEM. The file in question is not in the cache. It is in the path C:\Program Files (x86)\Dropbox\Update\Install\{06CD02FF-6D05-4F19-B801-C267B1180070}

I suspect it may very well be a legitimate file/update to the Dropbox Program, or it could be a trojan ransomware virus monster from hell. How do I confirm through Dropbox.com, or wherever, if it's legitimate.

Thanks.
narrationsd
New member | Level 2
8 years ago
This is the second time in two weeks or so that you've sent out an auto-update which Norton says contains no certificate.

I blocked it ; not sure about the other instance, as Norton foolishly allows a proceed if you aren't around to catch this.

Please, don't be untrustworthy -- at least two meanings intended, and fix this...!

Thanks
Walter
Dropbox Community Moderator
8 years ago
Hey there narrationsd - Welcome to our Forum!

First off, I wanted you to know that I moved your post to a thread that is relevant with what you described. For your reference, you can take a look at the original post here.

Moreover, as you can see on our Known Issues thread (as per the Welcome Banner), this issue is currently investigated by our engineers. You can keep a lookout for an update here on our Forum - I, or a colleague of mine, will be updating this thread too once we have further news on the matter.

Thank you for your diligence and patience on this one. Have a great day!
Walter
Dropbox Community Moderator
8 years ago
Hey there RichMath - apologies for the tardy response; are you still seeing this warning when using our latest stable build (50.4.71 at the moment)?

I am just writing to let you know that our engineers have been informed accordingly and working actively towards a fix. You can see more about this currently Known Issue on this page.

Thanks for reporting this and have a wonderful week ahead Rich!

[EDIT: I have moved your query to an already existing thread that discusses the same issue. You can see the original post here. ]