Child Item

Dropbox conflicting with Anti virus (Norton/Sophos)

UR1ofTHEM

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.

Find more posts tagged with

Setting Up the Apps

Security

Error Messages

Sync

Spam

Disagree

AcceptAnswer

Closed - Partially Delivered

Accepted answers

Lucio

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!

All comments

RichMath

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

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

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.

@UR1ofTHEM

Jane

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

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

@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

@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.

@UR1ofTHEM

Thanks.

narrationsd

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

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

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. ]

pugnut

Hi.

Receiving a notification saying DropboxClient_52.4.58 does not have a valid digital signature. What does this mean?

Thanks.

Jane

Hey @pugnut, thanks for posting this inquiry here!

You may keep in mind that I've moved your post under this discussion, as other users have reported the same behavior & we're trying to keep things neat as much as possible. Since our team is currently aware of this issue & working on a solution, I'd advise checking back again for any updates.

I hope that this is helpful to you. Enjoy the rest of your day!

Lucio

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!

davidonelson

Norton reports the same issue for me just now: Dropbox 53.4.67 installer does not have a valid signature. So the problem continues.

rpj

I too am getting this error from Norton.

unknown

I just got the same warning for Dropbox 55.4.171. I am completely up to date with my Norton Antivirus, live update shows no updates available. Since this has been going on a long time it seems that the problem may be with Dropbox not with Norton. Any ideas how to fix this problem?

Thanks,

Bill

Purplexed

I'm getting "Dropbox 55.4.171 installer does not have a valid digital signature" message from Norton too. This looks like its been ongong for months now and still continues with new installers as they come out. It also says that the 55.4.171 installer has fewer than 5 users in the Norton Community and that the file was released less than a week ago. What gives?

Walter

Hey Folks,

For all of you affected by this, just wanted you to know that we're investigating this. I'll make sure to let you know more about this as soon as I have an update.