The Bitcoin community has been angrily pressing for details on what the Bitcoin exchange Mt. Gox has described as a massive hacker attack that stole hundreds of millions of dollars worth of its users' bitcoins and left the company bankrupt. Mt. Gox's staff isn't talking. So another group of hackers say they've broken into the company's servers to provide answers of their own. 
 
 On Sunday, hackers took over the Reddit account and personal blog of Mark Karpeles, Mt. Gox's CEO, to post an angry screed alleging that the exchange he ran had actually kept at least some of the bitcoins that the company had said were stolen from users. "It’s time that MTGOX got the bitcoin communities wrath instead of [the] Bitcoin Community getting Goxed," wrote the unidentified hackers, referring to the multiple occasions over its three year history when Mt. Gox has gone offline, delayed trades or suspended withdrawals, events so common that Bitcoin users coined the phrase to be "goxed"--to suffer from Mt. Gox's technical glitches. 
 
 The hackers also posted a 716 megabyte file to Karpeles' personal website that they said comprised stolen data from Mt. Gox's servers. It appears to include an Excel spreadsheet of over a million trades, a file that purports to show the company's balances in eighteen difference currencies, the backoffice application for some sort of administrative access to the databases of Mt. Gox's parent company Tibanne Limited, a screenshot of the hackers' access to those databases, a list of Mark Karpeles' home addresses and Karpeles' personal CV. 
 
 Update: Users on Reddit are warning that the hackers’ files may contain malware designed to steal bitcoins. Other Reddit users have confirmed that they found their own account history in the data, indicating that it’s not fake. But for security reasons, I don’t recommend anyone download the collection of hacked files. 
 
 In the hackers' summary of Mt. Gox's balances in various currencies, they point to a claimed balance of 951,116 bitcoins, which they take as evidence that Mark Karpeles' claim to have lost users' digital currency to hackers is fraudulent. "That fat fuck has been lying!!" a note in the file reads. 
 
 I've reached out to Karpeles for comment, but haven't yet heard back from him. Mt. Gox's embattled chief executive has remained almost entirely mum as his company has imploded over the last weeks. 
 
 In a possibly related incident, a user on the BitcoinTalk forum posted a message--since deleted by the forum's moderators--claiming to be offering for sale a 20 gigabyte stolen database from Mt. Gox, including the personal details of all its users and even scans of their passports. "This document will never be elsewhere published by us," wrote the user, who went by the name nanashi____. "Selling it one or two times to make up personal loses from gox closure." The hacker asked for a price of 100 bitcoins for the database, about $63,600 at current exchange rates. ' 
 
 I've reached out to nanashi____ via an email address he or she provided, and I'll update this post if I hear back. 
 
 I couldn't verify that Sunday's database dump was real, or that it showed any of the "lying" that the hackers claimed. In fact, it may simply show how Mt. Gox's accounting mismatched with its actual store of Bitcoins--that it was counting bitcoins as being safe in its coffers when they had already been stolen by thieves. 
 
 But as Bitcoin experts pore over the hacked files, they may yet offer clues to the mystery around Mt. Gox's fate. The Bitcoin community has been puzzled by the apparent lack of movement of Mt. Gox's bitcoins since the company declared bankruptcy last month. Despite stating that it lost 850,000 bitcoins in total in its bankruptcy filing, Bitcoin experts haven't seen the movement of those coins in the Bitcoin blockchain, the public ledger of transactions that prevents fraud and forgery in the Bitcoin economy. 
 
 Moderators on the Bitcoin subforum on Reddit deleted the hackers' post a few hours after it first appeared, stating that posting stolen content violated the forum's etiquette rules. But users on the forum didn't hesitate to draw their own conclusions: the top post on the forum Sunday afternoon read "Mt. Gox scam was just exposed -- MK [Mark Karpeles] officially stole our funds." 
 
 "We've been goxed!" it added. 
 
 With reporting contributed by Kashmir Hill. 
 
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 Follow me on Twitter , email me, anonymously send me sensitive documents or tips , and check out the new paperback edition of my book, This Machine Kills Secrets: Julian Assange, the Cypherpunks, and Their Fight to Empower Whistleblowers. ||||| Hackers claim the data allegedly collected from the exchange's servers shows a disparity in the number of bitcoins deposited versus how many it claims were stolen in a security lapse. 
 
 A screenshot of the data purportedly taken by hackers from Mt. Gox servers. 
 
 Apparently frustrated by a lack of information about how Mt. Gox lost hundreds of millions of dollars in a security lapse, hackers hit the personal blog of Bitcoin exchange's chief executive to level charges of fraud. 
 
 The Reddit account and personal blog of Mt. Gox CEO Mark Karpeles, MagicalTux.net, were hijacked Sunday and defaced with a post that alleged the exchange kept some of the coins allegedly stolen in fraudulent withdrawals. Hackers also posted a 716MB ZIP file that allegedly contained data stolen from Mt. Gox servers on the sites as well as to Pastebin. 
 
 The data dump claims that 951,116.21905382 bitcoins were deposited into Mt. Gox. The embattled exchange filed for bankruptcy last month, saying that Mt. Gox lost nearly 750,000 customer bitcoins, as well as 100,000 of the exchange's own bitcoins. 
 
 "First and foremost, this is not Mark Karpeles," hackers wrote. "It's time that MTGOX got the bitcoin communities wrath instead of [the] Bitcoin Community getting Goxed." The phrase "getting Goxed" has become synonymous with the frustration felt by many Mt. Gox investors, who have suffered frequent outages, delayed trading, and suspended withdrawals. 
 
 "Included in this download you will find relevant database dumps, csv exports, specialized tools, and some highlighted summaries compiled from data," the hackers wrote their profanity-laced diatribe. "No user database dumps have been included." 
 
 CNET could not independently confirm the veracity of the claims, but some Reddit users said they were able to confirm that their personal account balances matched the data in the posting, which was posted in the form of an Excel spreadsheet. 
 
 CNET has contacted Mt. Gox for comment and will update this report when we learn more. 
 
 At its height, Mt. Gox was one of the largest and most popular Bitcoin exchanges. However, the troubled exchange suspended customer withdrawals on February 7, claiming a fundamental flaw existed in Bitcoin that affected all transactions. Mt. Gox later apologized for the issue and said it had developed a workaround that would allow it to resume service, but that has not yet happened. 
 
 Due to the currency's encryption technology, it might be difficult, if not impossible, for the stolen bitcoins to be restored to their owners' accounts, leaving people across the globe with significant losses. ||||| Tokyo-based Bitcoin exchange Mt. Gox lost $400 million worth of bitcoins in February. Its management said the amount was stolen after hackers exploited a transaction bug to divert the funds, but some of Mt. Gox's users are not so sure, suggesting instead that the exchange's owners pocketed the cash. Now, facing silence from those owners about the fate of the money and the methods by which 6 percent of all of the Bitcoin in the world could have been stolen, a group of hackers claims it has broken into the bankrupted Bitcoin exchange's network to get answers. 
 
 Forbes reports that the group gained access to the personal blog and Reddit account of Mark Karpeles, Mt. Gox's CEO. The hackers used the platforms to post a message that claimed Karpeles still had access to some of the bitcoins that he'd reported stolen. In support of the claim, they uploaded a series of files that included a spreadsheet of more than a million trades, Karpeles' home addresses, and a screenshot purportedly confirming the hackers' access to the data. 
 
 The hackers claim that Mt. Gox still has access to 951,116 bitcoins 
 
 Also included as part of the 716MB file was a file that appears to show the exchange's balances in 18 currencies. The hackers point to this file — which reportedly shows a balance of 951,116 bitcoins — as evidence that Mt. Gox is misrepresenting the current situation. A note in the file from the hackers reportedly reads "That fat fuck has been lying!!" 
 
 The files could simply show poor accounting practices 
 
 Forbes says the veracity of the file has yet to be confirmed. It could simply highlight the kind of poor accounting practices that allowed hackers to steal the money in the first place, showing money in Mt. Gox's balances that has long since made its way to hacker hands; or it could be evidence to support the theory that the company used the cover of a transaction exploit to steal its customers' money. The exchange claimed it had lost 750,000 of its customers' bitcoins in its bankruptcy protection filing — in addition to 100,000 of its own bitcoins — but users of the cryptocurrency are yet to see that money appear on the log of public Bitcoin transactions known as the blockchain. That would suggest whoever does have the money isn't spending it at the moment. 
 
 Forbes suggests the hack may be related to another supposed breach in which a user on BitcoinTalk's forums offered a 20GB file that they said was also stolen from Mt. Gox. The user claims the file is full of Mt. Gox users' personal details and passport scans, and that they were planning to sell it for 100 bitcoins "one or two times to make up personal losses from Mt. Gox closure."
– Hackers say the now-bankrupt Bitcoin exchange Mt. Gox has been less than honest about money lost in a major security lapse. Yesterday, they hacked into CEO Mark Karpeles' blog and Reddit account, announcing that the company had kept currency it claimed was stolen, Forbes reports. They said they'd hacked Mt. Gox's servers, and posted a file full of data suggesting the exchange had a balance of 951,116 bitcoins. Hackers say that points to fraud after the company claimed it lost 750,000 of users' bitcoins. The authenticity of the document isn't entirely clear, though some Reddit posters noted that personal account information revealed in the file appeared accurate, CNET notes. Still, it's possible that the balance shows money that was already lost in the security breach, reflecting bad accounting rather than theft, the Verge reports. Meanwhile, a bitcoin forum user said he or she was trying to sell 20 gigabytes of stolen information from Mt. Gox—a database that holds user details, including passport scans. "Selling it one or two times to make up personal loses (sic) from gox closure," the user said. The price: 100 bitcoins, or some $63,000, Forbes notes.