Forum Discussion
Applocker blocking certain 1pw exe files
- 2 months ago
Hi all and thanks everyone for contributing ideas and suggestions. To sum it up:
- 1password is in the process of changing the way files are being signed and while this is ongoing, exe files will have two certificates ("dual signed")
- Applocker will block those dual signed files (at least the 1password files, I havent tested this on other files) when allowd by a "Publisher Rule"
- As a workaround it is possible to allow the files via "File Hash Rules" (meaning: every single file = one rule per file)
- After 1password is done transitioning the signing process, the dual signing will stop and therefore Applocker Publisher Rules are likely to function again as they should
This is what the Support wrote:
With regards to publisher certificates, the team are transitioning to using Microsoft's Trusted Signing, because of that, the installer is currently signed with two certificates, with the MS Trusted Signing one being the second certificate. The first certificate is nearing expiration and will be removed from the installer in the near future (according to the Development team this will be end of this month or early next month).
It's possible that AppLocker currently may not support dual certificates (they have supported it in the past), it may be rejecting the first certificate due to it nearing expiration, or simply fails to recognize publisher rules when dual-signed binaries are involved. In the interim you'll likely need to use hash rules for the 1Password app in order to allow it with AppLocker. Although I don't have a specific timeline to share or can't make any promises as the landscape may change, given regular update cadence I expect no more than the next two updates will contain dual certificates.
Hello david_eliasโ! ๐
I'm sorry that you're unable to install 1Password due to AppLocker. I'm not an expert with AppLocker but error 8004 seems to indicate that 1Password's installer is being blocked by an AppLocker rule that you, or your IT team has configured. You can find more information on Microsoft's website: Review the AppLocker logs in Windows Event Viewer
Note: The above link was created and is maintained by a third-party and I can't vouch for its accuracy.
As a first step, I suggest deleting the 1Password installer from your system and restarting your Windows device. Then download a new installer from our website. If you run into the same issue with the new installer then I recommend reaching out to your IT team, or Microsoft Support, so that they can help troubleshoot your AppLocker configuration further.
Let me know if there's any other information that I can provide from the 1Password end of things.
-Dave
Hi Dave,
I have started having the same issue in our environment, we have had 1password allowed for quite some time and never had an issue until now. I have since allowed via signature, path rule, and file hash, but 1password refuses to run.
is it possible that there is any kind of issue with the certificate? I note that the signing time is Tuesday, 13 of May which roughly coincides with when this started occurring for us.
-Jake