Tag Archives: WannaCry Attack

Bitcoin’s murkier rivals line up to displace it as cybercriminals’ favourite

FILE PHOTO: A Bitcoin (virtual currency) paper wallet with QR codes and a coin are seen in an illustration picture taken in Paris, France May 27, 2015. REUTERS/Benoit Tessier/File Photo

By Jemima Kelly

LONDON (Reuters) – Bitcoin is well-entrenched as the preferred payment for cybercriminals like the WannaCry hackers who have hit more than 300,000 computers over the past week, but cryptocurrencies offering more anonymity are threatening to displace it.

A key reason for bitcoin’s dominance in the nefarious online underworld, say technologists and cybercrime experts, is its size – the total value of all bitcoins in circulation is more than twice that of the nearest of hundreds of rivals.

That makes it easy for victims to access enough to pay the ransoms demanded, and for hackers to cash out of it via online exchanges to spend money in the real world.

Bitcoin was set up in 2008 by someone – or some group – calling themselves Satoshi Nakamoto, and was the first digital currency to successfully use cryptography to keep transactions secure and hidden, making traditional financial regulation difficult if not impossible.

Money is sent from one anonymous online “wallet” to another with no need for a third party to validate or clear the transactions.

In the WannaCry attack, the addresses of three anonymous bitcoin wallets were given to victims, with a demand for ransom payments from $300 worth of bitcoin, with a promise the affected machines would be decrypted in return, a promise that no evidence has shown will be kept.

But since the way that Bitcoin functions is via the blockchain – a giant, virtually tamper-proof, shared ledger of all bitcoin transactions ever made – payments can be traced, if users do not have the sophistication to take further steps to cloak themselves using digital anonymity tools.

“In the initial days of bitcoin, people…didn’t realise they were recording for posterity on the blockchain every financial transaction that ever took place,” said Emin Gun Sirer, a computer science professor at Cornell University.

Bitcoin addresses are anonymous, but users can be traced through IP addresses or by analysing money flows.

If criminals using bitcoin want to stay truly anonymous, Gun Sirer said, they have to go through a number of additional, complex steps to make sure they do not get caught.

It is not yet clear what level of sophistication the WannaCry hackers have when it comes to laundering their cryptocurrency, as none of the money has yet been moved out of the three bitcoin wallets linked to the ransomware, which have had over $80,000 worth of bitcoin paid into them so far. [http://tmsnrt.rs/2rqaLyz]

But some have suggested that the fact that the WannaCry hackers demanded bitcoin shows how amateur they are.

“If it was me, I would want people to use bitcoin all day, because you can trace it,” said Luke Wilson, vice president for law enforcement at Elliptic, a London-based security firm that tracks illicit bitcoin transactions and that counts the U.S. Federal Bureau for Investigations (FBI) among its clients.

Wilson, who used to work at the FBI, where he set up a taskforce to investigate the use of virtual currencies, did not disclose all the ways that Elliptic and law enforcement agencies find criminals using bitcoin. But sometimes, he said, the offenders make as obvious a mistake as withdrawing money from a bitcoin wallet directly into their bank accounts.

CAT-AND-MOUSE GAME

More sophisticated criminals use obfuscation methods that make it very hard to be tracked down. One of the most basic ones is a technique known as “chain-hopping”, whereby money is moved from one cryptocurrency into another, across digital currency exchanges – the less-regulated the better – to create a money trail that is almost impossible to track.

Newer and more complex money-laundering methods have also emerged in recent years, which make it very difficult for law enforcement and bitcoin security firms such as Elliptic or New-York-based Chainalysis to track down cybercriminals.

“It’s a cat-and-mouse game – as police and companies like Elliptic catch up to criminals’ techniques, they invent new techniques,” said Jerry Brito, executive director of the Washington, D.C.-based Coin Center, a not-for-profit advocacy group focusing on public policy issues around cryptocurrency.

These techniques are not foolproof, however – chain-hopping, for example, relies on unregulated exchanges that do not carry out know-your-customer (KYC) checks, and security firms say they will develop ways to trace such methods.

MONERO HACK

Easier, perhaps, would be for cybercriminals to use next-generation cryptocurrencies that have built-in anonymity from the start, such as Monero, Dash and Z-Cash.

And indeed, experts said late on Tuesday that a computer virus that exploits the same vulnerability as the WannaCry attack had latched on to more than 200,000 computers and begun using them to manufacture – or “mine” – Monero currency.

But with a total value of around $425 million – a little over 1 percent of that of bitcoin – converting that currency into spendable cash might not be so easy, and it is also much harder for victims to access, alternative payments experts said.

That is why the Monero attack did not demand a ransom, but rather used the infected computers’ computing power to create new currency.

“This used to happen in bitcoin before it became big – there were loads of botnets that went into computers that used to mine bitcoin, but you now can’t basically mine bitcoin on normal computers because you need specialist hardware,” said Chainalysis CEO Jonathan Levin.

Levin said such bitcoin-based attacks were carried out several years ago, when mining it was still largely a hobby for tech geeks using their home computers.

As the bitcoin price has risen and as transaction numbers have grown, the computers have become so specialized that only they can only perform the function of bitcoin mining.

“If Monero does become adopted and is as big and liquid (as bitcoin), that means the crime (will) move from using computers to mine to getting to extortion,” Levin said.

French researchers find last-ditch cure to unlock WannaCry files

A hooded man holds a laptop computer as blue screen with an exclamation mark is projected on him in this illustration picture taken on May 13, 2017. REUTERS/Kacper Pempel/Illustration

By Eric Auchard

FRANKFURT (Reuters) – French researchers said on Friday they had found a last-chance way for technicians to save Windows files encrypted by WannaCry, racing against a deadline as the ransomware threatens to start locking up victims’ computers first infected a week ago.

WannaCry, which started to sweep round the globe last Friday and has infected more than 300,000 computers in 150 nations, threatens to lock out victims who have not paid a sum of $300 to $600 within one week of infection.

A loose-knit team of security researchers scattered across the globe said they had collaborated to develop a workaround to unlock the encryption key for files hit in the global attack, which several independent security researchers have confirmed.

The researchers warned that their solution would only work in certain conditions, namely if computers had not been rebooted since becoming infected and if victims applied the fix before WannaCry carried out its threat to lock their files permanently.

The group includes Adrien Guinet, who works as a security expert, Matthieu Suiche, who is an internationally known hacker, and Benjamin Delpy, who helped out by night, in his spare time, outside his day job at the Banque de France.

Suiche has published a blog with technical details summarizing what the group of passing online acquaintances has developed. He links to a tool called Wannakey built by Guinet, the creator of the original concept.

“THE ONLY WORKABLE SOLUTION”

Guinet, a security researcher at Paris-based Quarks Lab, published the basic technique for decrypting WannaCry files on Thursday, which Delpy then figured out how to turn into a practical tool to salvage files.

Suiche, based in the United Arab Emirates and one of the world’s top security researchers, provided advice and testing to ensure the fix worked across all various versions of Windows.

Wannakey was quickly tested and shown to work on Windows 7 and older Windows versions XP and 2003, Suiche said, adding that he believes the hastily developed fix also works with Windows 2008 and Vista.

“(The method) should work with any operating system from XP to Win7,” Suiche told Reuters via direct message on Twitter.

“This is not a perfect solution. But this is so far the only workable solution to help enterprises to recover their files if they have been infected and have no back-ups,” Suiche said of network back-up and retrieval systems which allow users with infected computers to restore them after re-imaging their PCs.

Classic customer help desk procedures typically advise users reporting computer problems to reboot their machines, but fast-acting users who pulled the plug on their PCs or otherwise did not attempt to repair them can benefit, the researchers said.

(Editing by Maria Sheahan and Gareth Jones)

U.S. cyber bill would shift power away from spy agency

An undated aerial handout photo shows the National Security Agency (NSA) headquarters building in Fort Meade, Maryland. NSA/Handout via REUTERS

By Joel Schectman

WASHINGTON (Reuters) – A bill proposed in Congress on Wednesday would require the U.S. National Security Agency to inform representatives of other government agencies about security holes it finds in software like the one that allowed last week’s “ransomware” attacks.

Under former President Barack Obama, the government created a similar inter-agency review, but it was not required by law and was administered by the NSA itself.

The new bill would mandate a review when a government agency discovers a security hole in a computer product and does not want to alert the manufacturer because it hopes to use the flaw to spy on rivals. It also calls for the review process to be chaired by the defense-oriented Department of Homeland Security rather than the NSA, which spends 90 percent of its budget on offensive capabilities and spying.

Republican Senator Ron Johnson of Wisconsin and Democratic Senator Brian Schatz of Hawaii introduced the legislation in the U.S. Senate Homeland Security and Governmental Affairs Committee.

“Striking the balance between U.S. national security and general cyber security is critical, but it’s not easy,” said Senator Schatz in a statement. “This bill strikes that balance.”

Tech companies have long criticized the practice of withholding information about software flaws so they can be used by government intelligence agencies for attacks.

Hackers attacked 200,000 in more than 150 countries last week using a Microsoft Windows software vulnerability that had been developed by the NSA and later leaked online.

Microsoft President Brad Smith harshly criticized government practices on security flaws in the wake of the ransomware attacks. “Repeatedly, exploits in the hands of governments have leaked into the public domain and caused widespread damage,” Smith wrote in a blog post.

Agencies like the NSA often have greater incentives to exploit any security holes they find for spying, instead of helping companies protect customers, cyber security experts say.

“Do you get to listen to the Chinese politburo chatting and get credit from the president?” said Richard Clayton a cyber-security researcher at the University of Cambridge. “Or do you notify the public to help defend everyone else and get less kudos?”

Susan Landau, a cyber security policy expert at Worcester Polytechnic Institute, said that in putting DHS in charge of the process, the new bill was an effort to put the process “into civilian control.”

The new committee’s meetings would still be secret. But once a year it would issue a public version of a secret annual report.

The NSA did not immediately respond to a request for comment.

(Reporting by Joel Schectman; Editing by Jonathan Weber and David Gregorio)

Cyber attack eases, hacking group threatens to sell code

Hardwares used for Cybersecurity are displayed at the desk of Security Platform during the TechCrunch Disrupt event in Manhattan, in New York City, NY, U.S. May 15, 2017. REUTERS/Eduardo Munoz

By Dustin Volz

WASHINGTON (Reuters) – Governments turned their attention to a possible new wave of cyber threats on Tuesday after the group that leaked U.S. hacking tools used to launch the global WannaCry “ransomware” attack warned it would release more malicious code.

The fast-spreading cyber extortion campaign, which has infected more than 300,000 computers worldwide since Friday, eased for second day on Tuesday, but the identity and motive of its creators remain unknown.

The attack includes elements that belong to the U.S. National Security Agency and were leaked online last month.

Shadow Brokers, the group that has taken credit for that leak, threatened on Tuesday to release more recent code to enable hackers to break into the world’s most widely used computers, software and phones.

A blog post written by the group promised from June to release tools every month to anyone willing to pay for access to some of the tech world’s biggest commercial secrets.

It also threatened to dump data from banks using the SWIFT international money transfer network and from Russian, Chinese, Iranian or North Korean nuclear and missile programs. “More details in June,” it promised.

The spread of the WannaCry attack – which encrypts a user’s data and demands a “ransom” be paid electronically to free it up again – slowed to a trickle on Tuesday, with few, isolated examples being reported.

In Canada, the Universite de Montreal was hit, with 120 of the French-language university’s 8,300 computers affected, according to a university spokeswoman.

There were no new, major incidents in the United States. Fewer than 10 U.S. organizations have reported attacks to the Department of Homeland Security since Friday, a U.S. official told reporters on Tuesday.

The attack has caused most damage in Russia, Taiwan, Ukraine and India, according to Czech security firm Avast.

The United States likely avoided greater harm as the attack targeted older versions of Microsoft Corp’s <MSFT.O> Windows operating system, and more U.S. users have licensed, up-to-date, patched versions of the software, compared to other regions of the world.

The Department of Homeland Security began an “aggressive awareness campaign” to alert the tech industry to the importance of installing the patch that Microsoft issued in March that protected users from the vulnerability exploited by the attack, a U.S. official working on the attack told Reuters.

Microsoft said on Tuesday it was aware of Shadow Brokers’ most recent claim and that its security teams monitor potential threats in order to “help us prioritize and take appropriate action.”

Microsoft President and Chief Legal Officer Brad Smith said earlier this week the WannaCry attack used elements stolen from the NSA. The U.S. government has not commented directly on the matter.

NORTH KOREA LINK PROBED

Cyber security researchers around the world have said they have found evidence that could link North Korea with the WannaCry cyber attack.

A researcher from South Korea’s Hauri Labs said on Tuesday their own findings matched those of Symantec <SYMC.O> and Kaspersky Lab, who said on Monday that some code in an earlier version of the WannaCry software had also appeared in programs used by the Lazarus Group, identified by some researchers as a North Korea-run hacking operation.

“It is similar to North Korea’s backdoor malicious codes,” said Simon Choi, a senior researcher with Hauri who has done extensive research into North Korea’s hacking capabilities and advises South Korean police and National Intelligence Service.

Both Symantec and Kaspersky said it was too early to tell whether North Korea was involved in the attacks, based on the evidence that was published on Twitter by Google security researcher Neel Mehta.

FireEye Inc <FEYE.O>, another large cyber security firm, said it was also investigating, but it was cautious about drawing a link to North Korea.

“The similarities we see between malware linked to that group and WannaCry are not unique enough to be strongly suggestive of a common operator,” FireEye researcher John Miller said.

U.S. and European security officials told Reuters on condition of anonymity that it was too early to say who might be behind the attacks, but they did not rule out North Korea as a suspect.

The Lazarus hackers, acting for impoverished North Korea, have been more brazen in their pursuit of financial gain than others, and have been blamed for the theft of $81 million from the Bangladesh central bank, according to some cyber security firms. The United States accused it of being behind a cyber attack on Sony Pictures in 2014.

North Korea has denied being behind the Sony and banking attacks. North Korean officials were not immediately available for comment and its state media has been quiet about the matter.

NO INFORMATION TO SHARE

In China, foreign ministry spokeswoman Hua Chunying said she had no information to share, when asked about the origin of the attack and whether North Korea might be connected.

Several Asian countries have been affected by the malware, although the impact has not been as widespread as some had feared.

In Malaysia, cyber security firm LE Global Services said it identified 12 cases so far, including a large government-linked corporation, a government-linked investment firm and an insurance company. It did not name any of the entities.

“We may not see the real picture yet, as companies are not mandated to disclose security breaches to authorities in Malaysia,” said LE Global CEO Fong Choong Fook.

“The real situation may be serious. In one of the cases, the attack was traced back to early April.”

Vietnam’s state media said on Tuesday more than 200 computers had been affected, but one of the country’s leading anti virus companies, Bkav, later put the figure at 1,900.

Taiwan Power Co. <TAIWP.UL> said that nearly 800 of its computers were affected, although these were used for administration, not for systems involved in electricity generation.

(Additional reporting by Eric Auchard in Frankfurt, Julia Edwards Ainsley in Washington, Jim Finkle in Toronto, Allison Lampert in Montreal, Jess Macy Yu in Taipei, My Pham and Mai Nguyen in Hanoi, Ju-min Park in Seoul, Michael Martina in Beijing and Liz Lee in Kuala Lumpur,; Writing by Jeremy Wagstaff in Singapore and Bill Rigby in New York; Editing by Sam Holmes)