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Ask HN: How did my LastPass master password get leaked?

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Re: Ask HN: How did my LastPass master password get leaked?

#31

Just checking the absolutely obvious, because I had a similar thing ... and then it turned out I had my VPN on. Thought I'd double check, in case someone was a silly as I am.

Thanks -- the original login attempt wasn't mine, so yeah. Not in this case.

Re: Ask HN: How did my LastPass master password get leaked?

#32
post #4

Since your master password is stored in another password manager, would it be accurate to say you copy/paste it into LastPass? If so, something running on your machine could be scraping your clipboard. This of course assumes that it wasn’t really you from an IP that was just misidentified as being from Brazil. For what it’s worth, I stopped using LastPass after they sold out to LogMeIn and would recommend others stop…

Why do you recommend others to stop using LastPass?

From my interaction with LastPass support (I'm a premium user), they've outsourced to some cheap company where agents have no clue how anything works. It took weeks to get through to somebody who even understands the problem and their reply was essentially "yeah we know it's broken, it's broken because of security".

Left a really bad taste in my mouth. I wouldn't be using them at all if I didn't have to for a client.

Re: Ask HN: How did my LastPass master password get leaked?

#33

Earlier quoted context omitted.

Yes, I do copy/paste from my local password manager. A clipboard scraper is a possibility, yes. I hadn't logged into that LastPass account for years, so it's definitely not me who attempted to login earlier. Re: LastPass, is there another cloud-based tool that's generally considered as more trustworthy? Bitwarden? Thanks

Bitwarden is great, highly recommend, it's open-source which adds to its trustworthiness and has a good track record of respecting users.

+1, you can host your own server as well https://github.com/dani-garcia/vaultwarden

Re: Ask HN: How did my LastPass master password get leaked?

#34
This also happened to me back on Nov 10, 2021. I had an old LastPass account, wasn't using it, when all of a sudden i get an email:

-- Login attempt blocked Hello,

Someone just used your master password to try to log in to your account from a device or location we didn't recognize. LastPass blocked this attempt, but you should take a closer look. ---

Like you, it told me that the attempt came from Brazil, using an IP address starting with 160. I have no idea how they would've gotten that password. Made me wonder if LastPass had some issue, but nothing was in haveibeenpwned

Re: Ask HN: How did my LastPass master password get leaked?

#35
post #16

Earlier quoted context omitted.

Sorry, what do you mean by "to log in to their bbuletin or whatever php forum"? According to LastPass, they don't have access to the master password // presumably it's not stored on their side. Is that accurate..? Thanks

I don’t use Lastpass, but if what you are saying is correct, they could not have sent the OP an e-mail (assuming it’s legit) informing them of the attempt to sign in using the master pass from Brazil, right?

Cryptography means lastpass doesn't need the master password to verify the password.

Re: Ask HN: How did my LastPass master password get leaked?

#36
post #27

Earlier quoted context omitted.

Yes, I do copy/paste from my local password manager. A clipboard scraper is a possibility, yes. I hadn't logged into that LastPass account for years, so it's definitely not me who attempted to login earlier. Re: LastPass, is there another cloud-based tool that's generally considered as more trustworthy? Bitwarden? Thanks

Personally I just stick to local Keepass database files. I’ve never ventured into the cloud based services. If you are really worried about it, do you really need to use a cloud based password service? Sure, managing the KeePass files by hand is certainly more cumbersome, but to me it’s worth it for the security/ peace of mind gains. I have never put my DB or key files in the cloud. And when I need to sync them up ov…

TIL about the merge functionality! You can also use Syncthing to synchronise the databases between your devices; if you don't have public IPs for your devices, this essentially means that you can only synchronise when two devices are on the same network -- but this might not be a problem for you.

Re: Ask HN: How did my LastPass master password get leaked?

#37
Master passwords are static passwords by definition. It could have been an old fashioned keylogger for example. It could also be a phishing email attempt.

Disclaimer: I worked on the 2FA part of the saas pass password manager which never has a master password and always uses passwordless MFA like scanning an encrypted barcode for unlocking the browser extension.

Re: Ask HN: How did my LastPass master password get leaked?

#38

This also happened to me back on Nov 10, 2021. I had an old LastPass account, wasn't using it, when all of a sudden i get an email: -- Login attempt blocked Hello, Someone just used your master password to try to log in to your account from a device or location we didn't recognize. LastPass blocked this attempt, but you should take a closer look. --- Like you, it told me that the attempt came from Brazil, using an IP…

What, really??

This is too crazy of a coincidence to be a coincidence.

This is exactly what's happening to me, and same IP prefix.

What does it mean?

---

How old of account was this? Can you contact me by email (email in my profile)?

---

Two theories:

- there is a problem with LastPass

- you and I both had the same Chrome extension installed that was actually compromised, and that extension was listening to/sending passwords typed into lastpass.com

I last used this account/master password back in 2017. Is that similar-ish to when you used your account?

Re: Ask HN: How did my LastPass master password get leaked?

#39
Hey, this _just_ happened to me too....my password would be near impossible to guess and is not used elsewhere...

Just deleted my last pass account!

here's the info that came with the email

Time Monday, December 27, 2021 at 1:41 PM EST Location São Paulo, SP 01323, BRAZIL IP address 160.116.88.235

Re: Ask HN: How did my LastPass master password get leaked?

#40
post #2

I'd get in touch with LastPass support asap to see if they have a digital trail to help you figure out what happened. I'd also guess the most plausible situation would be malware on your computer that managed to sniff your credentials in-transit/clipboard/memory/browser/keyboard and exfiltrate it to some shady folks.

Thanks Sending emails to support@lastpass.com doesn't work ("This inbox is not monitored") and I have to upgrade my account to contact their support, which I'll do right away. EDIT: after checking, the login attempt does appear in my Account History (my original email said it didn't -- I wasn't looking in the right place)

Heh, I reached out to that same email literally earlier today to complain about their abysmal Android support, and I'm already a paying customer. I'm not happy with their non-response automated email and will be looking for a good alternative.
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