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Compromised Linode, thousands of BitCoins stolen

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151–160 of 249 posts

Re: Compromised Linode, thousands of BitCoins stolen

#151

For those of us late to the Bitcoin idea, how does one "steal" Bitcoins? Is it the equivalent of copying someones private key and then deleting all their copies of the key?

Generally the thief copies the wallet (private keys) and transfers the BTC to his own account. It's not necessary to delete anything.

Re: Compromised Linode, thousands of BitCoins stolen

#152
post #100

Earlier quoted context omitted.

I disabled root login when I was setting up the server. Could my server be affected too? Also admins that only log with ssh keys and don't use root won't be able to notice that, will they?

Probably. You disabled root login how, via the sshd_config file? If so, you're still screwed. Even if you fully disable root, that's not going to stop the init=/bin/sh script. Even if you fix that (securing grub?) you're still screwed because it's a virtual machine, and they can just mount the partition to another VM, and pull all your data/reset root that way. So, maybe if you have an encrypted partition, no root ac…

Well, having the whole disk dm-crypted is kind of secure I guess. At least I still have no idea how I get at my ssl certification keys from startssl, although I have a dd of that drive in question from the vps provider. I was just too clever thinking of a long passphrase and too stupid to keep at least a hint around somewhere..

Total dataloss for me. But i fyou _do_ remember your dm_crypt password, I think you're safe against these kind of attacks

Re: Compromised Linode, thousands of BitCoins stolen

#153

For those of us late to the Bitcoin idea, how does one "steal" Bitcoins? Is it the equivalent of copying someones private key and then deleting all their copies of the key?

Or just copying the key and "spending" it before anyone else can.

Re: Compromised Linode, thousands of BitCoins stolen

#154
post #3

So, a customer service interface was compromised via stolen credentials and used to access various Linode instances. A couple questions that immediately come to mind: 1. Can this interface be accessed from anywhere on the Internet? If so, why? If not, does that mean other systems owned by Linode were compromised as well? 2. Why can customer service representatives access and update servers without the client being no…

Linode will send you a confirmation email if you access the admin panel from a "new" IP. This guy must have had his email address compromised as well.

Looks like a class spear-attack.

Re: Compromised Linode, thousands of BitCoins stolen

#155
post #93

Earlier quoted context omitted.

where do you keep the key to the crypto fs?

Written on a scrap of paper in your wallet. only the password and no other info should be on the scrap. If you can memorize it, it is a bad password.

Hmm, hope you don't take many vacations

Re: Compromised Linode, thousands of BitCoins stolen

#156
post #105

" As a respected hosting provider, I hope they do the correct thing and refund me for this liability due to their error. Many people trust Linode, and they have proven themselves as a serious contender for hosting critical sensitive operations on the internet. I would hate to not see them live up to that reputation. " "hosting critical sensitive operations" in particular. If you are doing "critical sensitive operatio…

I can put a "not responsible for stolen items" sign in my restaurant, but if the coat check employee bolts out the door when you hand them your coat, I'm buying you a new one.

Re: Compromised Linode, thousands of BitCoins stolen

#157

Please people (not corporations w/ staffs), do not run critical systems in the cloud. Get a dedicated server (not cheapest you can find) and secure it with: (install in this order) APF - http://www.rfxn.com/projects/advanced-policy-firewall/ BFD - http://www.rfxn.com/projects/brute-force-detection/ rkhunter Ideally, install rkhunter on fresh system, right after updates, APF, & BFD. Then update the binary check-sums w…

And, I'd add "if any of this is news to you, you should _seriously_ question whether you're skilled/competent enough to be admin-ing publicly accessable servers with files (like bitcoin wallets) that can be valued in the thousands (or tens or hundreds of thousands or more)".

Re: Compromised Linode, thousands of BitCoins stolen

#158
post #6

Hmm, for a customer of a cloud provider, this sort of thing will be very hard to defend against. Maybe if the customer service system had had two-factor security, this might have been avoided (i.e., customer service can access your account only if you read them your hardware token's code). Requiring SSL/SSH client certificates even for intranet accesses might have deterred this attack. I hope other cloud providers ta…

Yes. Tracing this back to one of their own employees, the company is clearly liable for any resulting loss. If they do not find themselves liable (and a court does not) this will be a big problem for people doing shared or cloud hosting, and traditional, physically secure datacenters will see a resurgence.

Re: Compromised Linode, thousands of BitCoins stolen

#159

For those of us late to the Bitcoin idea, how does one "steal" Bitcoins? Is it the equivalent of copying someones private key and then deleting all their copies of the key?

No, you use a stolen private key to transfer the Bitcoins to a new public key whose private key is only known to the thief.

Re: Compromised Linode, thousands of BitCoins stolen

#160
post #156
post #105

" As a respected hosting provider, I hope they do the correct thing and refund me for this liability due to their error. Many people trust Linode, and they have proven themselves as a serious contender for hosting critical sensitive operations on the internet. I would hate to not see them live up to that reputation. " "hosting critical sensitive operations" in particular. If you are doing "critical sensitive operatio…

I can put a "not responsible for stolen items" sign in my restaurant, but if the coat check employee bolts out the door when you hand them your coat, I'm buying you a new one.

Yeah, but could the (ex) coat owner hold the restaurant's landlord liable? Isn't it the restaurant _managers_ problem?

I think there's a _lot_ of "grey areas" here, and while I feel sympathy for the guy who's out ~$13k worth of bitcoins, I can't help but think he was "doing the wrong thing" relying on the security of an inexpensive vps to keep them safe…

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