18 May, 2017
As a ransomware program, WannaCry itself is not that special or sophisticated.
"This number does not include infections inside corporate networks where a proxy server is required for connecting to the internet, meaning that the real number of victims might easily be larger", he said. The hacking tool spreads silently between computers, shutting them down by encrypting data and then demanding a ransom of $300 to unlock them.
Theft of the software was reported in April, when it was published by the Shadow Brokers, a group that has been linked to Russian Federation.
According to Kaspersky, there were around 500 new attempted WannaCry attacks sighted across Kaspersky Labs' customer base on Monday morning when organisations in Europe opened for business. Microsoft has tried to convince companies to stop using SMBv1 for some time, as it has other problems aside from this flaw.
After the WannaCry attack, Microsoft went out of its way to ensure the safety of users. The company rates the update as "critical" for supported Windows releases. Organizations still using any of the unsupported platforms will get regular security updates only if they pay enormous fees for "custom support". Windows 10, the latest version, was free for the first year to encourage users to upgrade.
You may want to consider turning on automatic updates from Microsoft Windows.
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"Really the lesson here is that for individuals, at least, if they didn't turn off the automatic update feature - so a Windows update in this case - they would've gotten the patch and they'd be fine", said Troy Hunt, a security trainer and a Microsoft regional director. Users of Windows 7, Windows 8.1 and Windows Vista can protect themselves by updating the software by running Windows Update on their computer. But the success of the attack shows that not enough people took advantage of the patch. He adds: "The Ransomware starts with an unsolicited email typically created to trick the victim into clicking on an attachment or visiting a webpage". Be wary of malicious email attachments and links. WannaCry appears to travel across corporate networks, spreading quickly through file-sharing systems.
However, it seems that those with Windows XP are most largely hit by the ransomware. But since newer variants of WannaCry are emerging rapidly, one or more of them could break past defenses.
An equally important thing is to back up all the important data on your computer. They are told that, if they don't pay a specific ransom amount by a given date, all the contents of their computer will be deleted.
He believes that state-sponsored cyberespionage groups could also take advantage of the SMB flaw to plant stealthy backdoors on computers while defenders are busy dealing with the much more visible ransomware attack. To get the decryption key, you must pay a ransom in the form of Bitcoin, which provides the threat actors some minor level of anonymity.
They exploited a ideal storm of factors - the Windows hole, the ability to get ransom paid in digital currency, poor security practices - but it's unclear if the payoff, at least so far, was worth the trouble.
Responding to the incident, the company's president and chief legal officer, Brad Smith, criticized the US government's weaponizing of computer vulnerabilities, the leak of which enabled this attack, and the dangers of not informing tech companies about them.