Bitcoin Forum

I need a 8 BTC loan.
I can pay back 10 BTC in 5 days.

my bitcoin address is : 1KRESt175G6Ny13bH6A5g21vKLHcCdsfpG

Loan sent. Return to 14cJemNEQh7sj7PKndqRxsiuFCPVcuUkfx

just like that :)

holy crap I did not make this post, who has been hijacking my account damnit.

I'll just send you 8 btc back now so my forum credit isnt ruined.
fuck I changed my password too. 175836c669c44941ca47d71dcbec6d6e536a60db58c017d14656109712b87e5f

Something odd going on - obviously someone or ones is targeting lending.  Confirmations by pm's recommended.  Nice that you were able to cover the debt, but yu shouldn't have had to.

I agree with Patrick, I took the risk here. Sending PM.

well this has taught me to start using a pgp key or something.

How does Pm's help ?  If the fake user answers the pm its the same shit...
unless you know some secret information of his ( grandmas maiden name...) and ask him

I guess the  5% a day interest should have been a big warning...

Even a five-minute delay could prevent the kind of fraud which occurred in the OP. Most users have PMs sent to their email account. If user is online, and is notified of emails, it's possible he could intervene to prevent similar fraud. It's unlikely to help, but it's a very easy way to help prevent similar problems.

Though, I'm curious as to how the OP had his account hijacked.

ETA: Also worth noting many loans aren't funded for a good few hours, sometimes days. Real owner may have control of the account again, perhaps've contacted the admin. However, it appears this situation was due to poor password management.... we're over-reacting a bit, I think, unless something like what happened in OP becomes more frequent.

Maybe this thread should be stickied as a warning to lenders ( and lendees....)

Would be a good idea to sticky something.

If an account is hacked, any of the info or settings could be changed so I'll definitely tread a little more carefully in the future. Lesson learned, thankfully a small one.

well you can check my signature line now. If you go to that link in it to my external site that has my btc address signed via gpg. So if any more loan requests come from me only send it to that address or to an address signed by me.

That's no use. If someone can post under your name, they can change your signature. We should ask theymos what's going on here.

Yup, sig thing won't be much good either like copumpkin mentioned.

Would be a pain, but maybe you should reformat your computer, install an anti-virus on it right away, then sign in and change your password and stuff up.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

May I suggest signing your requests with a gpg signature. Then at least they will need to steal your forum password, your computer, your passphrase, and understand how to use gpg.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG/MacGPG2 v2.0.17 (Darwin)
Comment: GPGTools - http://gpgtools.org
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=2AV+
-----END PGP SIGNATURE-----

but the link in my sig points to an external site which the hijacker does not have control over. Plus the address is crypto signed by me which you can verify via open pgp http://www.slideshare.net/poustchi/how-to-use-openpgp-for-email-encryption-signing

exactly

Well, the issue there is that there's no strong connection between someone's GPG identity and their forum identity. A scammer could easily generate a new key and sign messages with that. There need to be write-once fields in one's forum profile to set a key identity so nobody can change it after taking control of your account :) Of course, depending on how badly compromised the forum gets, they could just change the field in the database and we'd be screwed either way. This is why we need a strong crypto-based decentralized loan/reputation system :)

My point is that the attacker can change your sig to point to another key on the same external site that's under his control, instead of yours. Or he could just change your sig to not point to a key at, and I doubt anyone would notice.

For an example loan request:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I need a loan for 8 btc
send to: 1QFgyRpGW2oX1JJHZvuaigW4ByDDVSbZVp
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.17 (MingW32)

iQEcBAEBAgAGBQJPIx0fAAoJEKHSMtujN58ELa4H/2oiIfvKLB7s/huM6/PsU8SR
PA86AWofv52xMb6L3iFnvEF+iaotmL43M8Py1FnJPHIQeA6q1xJFHBKVQzR3c1rJ
n2JiuyeZ6h9qtJg5WYeyhpuWZCxbOjyO/fmmhdCzF0pQoHHjKcwtqaR3HqDeYMnP
YK82bNXSMbl2BzHymDdC3Uymu/6/mPd6kcwkvk6E+548WPf2zadlvKvFaeffBJtJ
srxDoXv8fYmT+9pmAmbKVrwQqpMEAPkSmRhJwcLDpOs9Z0Cq2bPiHXFWiAZezB9U
+0cVAU5i2VPzcJrS6hMGM54iEjFaXU30rjKYqqV5PImSfMw11vhEM5BzT4Iwmhg=
=IFlf
-----END PGP SIGNATURE-----

How was your account compromised? Did you have a very weak password?

A few other users claim to have had their accounts compromised today, though these users were just posting useless garbage, not scamming. The attacker seems to come from 83.167.240.*.

I'm not sure if this is legit or not, but this guy also hadn't posted in ages and then suddenly asked for a loan (and got one, sadly, and doesn't seem to have bothered giving any responses to questions after the loan request):

https://bitcointalk.org/index.php?action=profile;u=7110;sa=showPosts

Copumpkin,

 Correct, I falsely assumed they would have a WoT correlation. Which if they didn't, I wouldn't 'loan' to them.

I'm pretty sure these accounts were compromised, so I've marked them all as scammers:
bitbetter
Gluskab
brunoshady
killer2021
kuba_10
Sjalq
madload

It looks like the attacker is just trying a few super common passwords on a bunch of user accounts.


He's using very different IP ranges, at least.

...further 'revenge' of the Mt.Gox email/password list again/still ?

My password was probably medium strength but I haven't changed it since I registered on the forum. So its possible one of the forum leaks had compromised it.

Just gonna leave this here.
https://lastpass.com/

My password is NTFS encryped and stored on my HD, only accessed when I need to log in. I don't see how LastPass will make this any better.

Then you aren't the target audience for the post   ;) 

You were right about epii. I found another IP and set of users taken by the attacker:
50.30.33.111
darvil, epii, Clarithium, borito4, tachi641, pharno, Iyeman

Thanks Theymos.

Two of the people with compromised accounts report that they were using the same password they used on MtGox, so it seems likely that the MtGox list is the source.

That's an awsome job sieving out the compromised accounts, Theymos. Thumbs up!
Do you think we can we make a warning sticky out of this thread in a more visible place than Meta?


All I can say is, don't re-purpose passwords, damn it! ::)
At the very least add a pseudo-random suffix to the "core password" if you really can do no better:
This approach will save you against a leaked password list being tested across multiple servers. Only three additional characters to remember in this example.

Also, it's not prudent to use the same username everywhere. Not only does this greatly simplify password attacks but it is also a hazard to your internet privacy.
Try adding some variation here as well, k? E.g.
That significantly raises the bar for any attacker trying to track you across different servers.