That's to prevent non-admin users from turning off the antimalware protection. I know of at least one security app (Malwarebytes) that doesn't ask for UAC confirmation when it starts - but needs UAC confirmation if you want to stop it running. Some apps, such as antivirus/antimalware apps bypass UAC as standard and don't give you a choice, you wouldn't want the AV/AM not launching just because a non-admin user couldn't supply an admin password. Some apps that can modify the system and settings allow you to choose to skip the UAC for that particular app but still using it for everything else.įor those particular apps it's up to you to as an admin user to decide if you want the UAC security on or not for that particular app.Īs you rightly say a non-admin user should not have that choice, see below. Which is why UAC asks a non-admin user to enter an admin username and password - to temporarily use admin rights for that task, and only for that task. If you are a non admin user or you have UAC prompts on full, and you don't OK a UAC prompt or have a task that bypasses the UAC prompt you can not modify, add to or delete files in certain folders. That's why installers require a UAC/admin prompt as they install even if they don't when you initially launch them. If you have UAC prompts on full and more importantly if your not an admin user you can not write in C:\Windows, C:\Program Files etc. You may have limited UAC prompts set for your user (in Control Panel > Users), that's just to make things more user friendly, Windows is bypassing UAC prompts it feels an admin is doing intentionally on that setting. They are all UAC checks if you have an admin account. Please read about what folders a non admin user can write to, modify and delete from. You may have limited UAC prompts by default as an admin user but that's not how a non admin account acts, it's bypassing UAC prompts it feels the admin is doing intentionally (with that setting), if you have UAC prompts on full and more importantly if your not an admin user you can not write in C:\Windows, C:\Program Files etc. Your probably getting confused because you are on a system as an admin with limited UAC prompts (set in control panel.) If you were on a computer as a non admin or with full UAC prompts you may understand better. You are not giving permission for anything other that that app to do it's thing, and that permission is ended when you close the app. If you have Skip UAC set in an app such as CCleaner then it's just the same as if you clicked 'Yes' to the popup as an admin, you are simply saying that you know the app you are about to use can change system files and you trust it to do that. However for a non-Admin user it displays a different popup that asks for an admin username and password to complete the task. The UAC is simply an extra 'warning' in Windows, it's on by default but anyone with admin permision can set it to be more strict or less strict, or turn it off globally.įor an admin user it pops up a window to remind/warn them that what they are about to do, or the app they about to run, could change the system and/or Windows settings and asks the admin user to conform that. It takes less than two seconds to ok a UAC prompt. I think having a "skip UAC" option in a program that allows a user to delete anything they want is irresponsible. Not only could you easily kill a Windows installation you can probably delete/stop certain Windows components and 3rd party security software as part of a wider attack. Then it could be used maliciously or irresponsibly (with the custom files and folders option.) In regards to CCleaner it could be installed by an admin and they simply forget to untick the UAC skip option. Especially in regards to UAC in general and it's effectiveness in stopping malware attacks. Ok, that's encouraging that it needs to run as an admin once. It's something microsoft put into existence but you are correct the only evidence a malware exploiting this argument is leaving behind a task (though they'll need to bypass uac on the creation of a task that's why ccleaner needs to be run as admin to implement the future skipping.) I have added this code to other programs that I have a task running them and it skips uac for that program too. It creates a windows task that in the run program after the program exe a $(Arg0). Yes you can indeed be malicious with the skip uac code.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |