ele Posted Wednesday at 08:24 AM Posted Wednesday at 08:24 AM Hello, Since one week I get a lot of "invalid certificate" warning about well known websites; e.g., connect.facebook.net (see attached screenshot). I'm using Kasperski Free (currently 21.20.8.505) since a long time without issue in Windows 10 Pro FR (22h2 build 19045.5608). How could I solve this reccurrent issue?
harlan4096 Posted Wednesday at 08:49 AM Posted Wednesday at 08:49 AM Welcome to Kaspersky Community. Hum 🤔 that link looks very suspicious to me... Not using https, its certificate it's expired, look at the pic on the left, that URL looks very suspicious, and the right URL to join FaceBook is: https://www.facebook.com/ https://www.virustotal.com/gui/url/cbc4829db140e6adf9405dd92e3f527d889051e0d2a4c472cf5fb5a47a7e8e95/detection 1
ele Posted Wednesday at 10:18 AM Author Posted Wednesday at 10:18 AM (edited) Yes, but it doesn't just happen on this link. I didn't note the different URLs, but it always happens on side URLs like a page may call under the hood (here, maybe connecting to an API); what I mean is that I didn't access this connect.facebook.net URL, but one of a page I visited did it apparently. Well, I'll restart my PC, clean the cache and cookies, then launch a full Kaspersky scan... And if this kind of warning comes again, I'll notice the concerned URLs... Edited Wednesday at 10:19 AM by ele
harlan4096 Posted Wednesday at 10:21 AM Posted Wednesday at 10:21 AM Check browser add-ons / extensions, if any suspicious, do a browser config reset. 2
Berny Posted Wednesday at 10:50 AM Posted Wednesday at 10:50 AM 2 hours ago, ele said: connect.facebook.net According https://www.ssllabs.com Certificate : " Valid until : Wed, 02 Apr 2025 23:59:59 UTC (expires in 7 days, 13 hours) " 🤔 2
ele Posted Wednesday at 01:53 PM Author Posted Wednesday at 01:53 PM (edited) My PC was ON since some weeks, so I closed everything (even killed any non-vital tasks through the task manager), cleaned up what possible from CCleaner (registry, caches, cookies), updated tenth of apps (including browsers), then rebooted... And now, a full Kaspersky scan is in progress. No warning anymore until now 🤞 However, thanks to both of you. Good idea, @harlan4096 (I have effectively a lot of extensions and I'll think to disable them one by one if any warning comes back), and noted @Berny (so, the one I saw was a fake or corrupted one, maybe). Edited Wednesday at 01:54 PM by ele 2
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