full-disclosure - Re: Hacked servers mining for bitcoins?

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Date: Tue, 19 Jul 2011 12:20:08 -0700
From: "Zach C." <fxchip@...il.com>
To: Robin <robin@...ec.net>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Hacked servers mining for bitcoins?

Hmm -- that's interesting. I wonder if it would be possible/feasible to
build a botnet in this fashion that would overtake legitimate bitcoin nodes
in terms of CPU power. (You probably know what would happen then)
On Jul 19, 2011 12:11 PM, "Robin" <robin@...ec.net> wrote:
> Had to deal with a server today that had been hacked (still running
> realVNC 4.0, so there's that lovely bypass exploit released 4 years
> ago). This server was an exchange/domain controller for a small business.
>
> Not much seemed to have been done to it. From the looks of it, all the
> attacker had done was make themselves a new account (domain user, local
> admin, username 'sys'), and had then logged into it, downloaded the
> Ufasoft bitcoin miner from a russian file sharing site, and then run it.
> The file was called `mmc.exe`, and was saved in the new account's `My
> Documents`. No other attempts to hide what was being done.
>
> Has anyone seen this before? Can you make more money from generating
> bitcoins on a hacked server than sending spam from it? The value of
> bitcoin is usually offset by the cost of generating it, but if you're
> using other people's resources to do it, it suddenly seems much more
> attractive. This looked like a fairly amateur attempt, so it could be a
> one-off skiddy, but maybe others will follow...
>
> ~Robin
>
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