The hosting company Linode was compromised: someone attacked a web-based customer service portal to specifically take control of machines belonging to customers running Bitcoin-related services. Linode claims that 8 customers were targetted. 4 of them have revealed that a total of 46653 BTC (about $220k) were stolen. The 4 other victims are still unknown.
- 43554 BTC were stolen from the Bitcoinica exchange. This up from the previous estimate of 10000 BTC stolen.
- 3094 BTC were stolen from Marek Palatinus (slush)'s Bitcoin mining pool. He shared quite a few more details in this post.
- 5 BTC were stolen from Gavin Andresen's Bitcoin faucet.
- The TradeHill exchange was compromised, but according to them no bitcoins were stolen, although a more thorough audit is in progress...
This makes it the largest Bitcoin theft ever (in terms of number of bitcoins), eclipsing the unrelated 25k BTC theft of June 2011 in which a single user had his computer compromised. However, if the other Linode victims come forward, they may confirm that today's theft was perhaps even higher than 47k BTC.