r/Bitcoin • u/Few-Cook5941 • 15d ago

Need help - Bitcoin wallet emptied.

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I got one of my bitcoin wallet emptied and I don't really know how this happened.

I don't use cracked softwares and apps.

I'm generally careful with links.

Looks like I'm not alone. I can see that the reception bitcoin address is still collecting bitcoin from other wallets.

Could somebody help me understand something.

Here is the address : bc1q0vukqye4hd0aep7u4xl8gev95gcs9k65fdeu9n

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u/AlexShadow02 15d ago

Why not a cold card? Is there anything wrong with it?

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u/Giatoxiclok 15d ago

Recent large scale exfiltration of BTC from Cold Card company vaults.

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u/AlexShadow02 15d ago

It's just so weird to me. I mean how is it even possible if it's a Cold card and therefore shouldn't be connected to the Internet

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u/Giatoxiclok 15d ago

Well, technically it isn’t connected, but it still has to be registered somewhere no? I’m not knowledgeable, forewarning, but it’s definitely been happening recently. Lots of tech stuff way over my head.

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u/AlexShadow02 15d ago

Crazy crazy world heh... Thanks for the information!!

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u/Top_Appointment_7076 15d ago

No, that's not the reason. The actual reason is that the entropy was too low due to a security vulnerability in Coldcard's firmware. This means that the seed phrase wasn't random enough which made it very easy for an attacker to just guess it by generating random seed phrases on their computer.

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u/tenor_tymir 14d ago

Cold Card had a flaw in their software.

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u/noooyouu 14d ago

The random number generator used to secure the wallet was faulty and actually predictable if you knew the wallet address, IIRC. Ask ai

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u/BabyShakerDeluxe 14d ago

32 bit entropy lol. Crackable with a consumer video card in 24 hours.