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Crowdstrike published a faulty update. Causes Windows to bluescreen. Driver is C-00000291*.sys. Will cause worldwide outages. Thread follows, I suspect. 🧵

I am obtaining a copy of the driver to see if malicious or bad coding, if anybody else checking let me know.

If anybody is wondering the impact of the Crowdstrike thing - it’s really bad. Machines don’t boot.

The recovery is boot in safe mode, log in as local admin and delete things - which isn’t automateable. Basically Crowdstrike will be in very hot water.

You know it was coming...

Crowdstrike's BSOP theme tune

Sky News has gone off air in the UK.

Favour to IT folks fixing - could you please copy the C-00000291*.sys file to somewhere and upload it to Virustotal, and reply with the Virustotal link or file hash? It's still unclear if the update was malicious or just a bug.

I've obtained copies of the .sys driver files Crowdstrike customers have. They're garbage. Each customer appears to have a different one.

They trigger an issue that causes Windows to blue screen.

I am unsure how these got pushed to customers. I think Crowdstrike might have a problem.

For any orgs in recovery mode, I'd suspend auto updates of CS for now.

If anybody is wondering, the update was delivered via channel file updates in Crowdstrike.

The .sys files causing the issue are channel update files, they cause the top level CS driver to crash as they're invalidly formatted. It's unclear how/why Crowdstrike delivered the files and I'd pause all Crowdstrikes updates temporarily until they can explain.

This is going to turn out to be the biggest 'cyber' incident ever in terms of impact, just a spoiler, as recovery is so difficult.

CrowdStrike's shares are down 20% in pre-market.

I'm seeing people posting scripts for automated recovery.. Scripts don't work if the machine won't boot (it causes instant BSOD) -- you still need to manually boot the system in safe mode, get through BitLocker recovery (needs per system key), then execute anything.

Crowdstrike are huge, at a global scale that's going to take.. some time.

Crowdstrike statement: bbc.co.uk/news/live/cnk4jdwp49

Basically 'it's not a security incident... we just bricked a million systems'

For anybody wondering why Microsoft keep ending up in the frame, they had an Azure outage and- this may be news to some people- a lot of Microsoft support staff are actually external vendors, eg TCS, Mindtree, Accenture etc.

Some of those vendors use Crowdstrike, and so those support staff have no systems.

But MS isn’t the outage cause today.

Crowdstrike publishes updated CIA triad

By far my fave thing with the Crowdstrike thing is Microsoft saying to try turning impacted PCs off and on again in a loop until you get the magic reboot where CrowdStrike updates before it blue screens.

lol Microsoft have put ‘reboot each box 15 times’ on its website

The chuckle brothers at NoName attempting to claim they caused the incident. To be super clear, NoName can barely DDoS a bike shed website, and once asked me to make their logo in Minecraft.

Probably the funniest BBC news update so far (they’ve cleared the airways for this incident).

BBC News at 6 is leading the entire show with this. (They asked me to appear but I was slightly busy).

For the record I spent much of the day trying to tell people it isn’t a Microsoft issue.

When I get successfully DDoS’d it’s both a security incident and I’m not protected…

Billboards in Times Square blue screen of deathing. Nice way to find out which orgs use Crowdstrike, this 🤣

Source is BBC News, if anybody wondering.

KJ6QDT

@GossiTheDog reminds me of the I am PC billboards from the late 2000’s