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SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast)

SANS Stormcast Monday, December 1st, 2025: More ClickFix; Teams Guest Access; Geoserver XXE Vulnerablity

SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast)

SANS ISC Handlers

Tech News, News, Technology

4.9696 Ratings

🗓️ 1 December 2025

⏱️ 6 minutes

🧾️ Download transcript

Summary


Fake adult websites pop realistic Windows Update screen to deliver stealers via ClickFix
The latest variant of ClickFix tricks users into copy/pasting commands by displaying a fake blue screen of death.
https://www.acronis.com/en/tru/posts/fake-adult-websites-pop-realistic-windows-update-screen-to-deliver-stealers-via-clickfix/
B2B Guest Access Creates an Unprotected Attack Vector
Users may be tricked into joining an external Teams workspace as a guest, bypassing protections typically enabled for Teams workspaces.
https://www.ontinue.com/resource/blog-microsoft-chat-with-anyone-understanding-phishing-risk/
Geoserver XXE Vulnerability CVE-2025-58360
Geoserver patched an external XML entity (XXE) vulnerability.
https://helixguard.ai/blog/CVE-2025-58360

Transcript

Click on a timestamp to play from that location

0:00.0

Hello and welcome to the Monday, December 1st, 2025 edition of the Sands Internet Storm Centers Stormcast.

0:12.4

My name is Johannes Ulrich, recording today from Dallas, Texas.

0:17.8

And this episode is brought you by the sands.edu graduate certificate program in

0:22.7

cybersecurity leadership. Well, first of all, it looks like this long weekend, at least here in the

0:28.8

US, was pretty eventless and no emergencies here to report about nothing that you need to do

0:36.0

right now in order to sort of catch up

0:38.6

for whatever threat you may have missed this long weekend.

0:42.9

But we do have a couple sort of smaller things that are certainly worth covering.

0:48.4

First one is a new development when it comes to click-fix attacks.

0:53.2

Click-fix attacks do trick victims into

0:57.0

copy pasting commands into a command prompt to then execute malicious code. The latest version

1:04.6

was here identified by a cronists and what they observed is attackers using fake blue screens of death. And with that, again,

1:15.6

tricking users into copy-pasting commands into a command prompt. The ultimate idea is exactly

1:24.1

the same as click fix, but just the lure is a little bit different

1:28.7

with the Blue Screen of Death,

1:30.7

maybe a little bit more plausible at this point,

1:33.1

given that we hopefully have taught users about ClickFix

1:37.2

or they have experienced it firsthand,

1:40.0

while they may not have seen this with a blue screen.

1:44.7

Apparently the websites with displaying the blue screens are being advertised via Google Ads,

1:51.4

and the blue screen doesn't show up right away,

1:54.4

but only after the user interacts a little bit with the website.

...

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