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A day after a ransomware worm infected 75,000 machines in 100 countries, Microsoft is taking the highly unusual step of issuing patches that immunize Windows XP, 8, and Server 2003. Microsoft also rolled out a signature that allows its Windows Defender antivirus engine to provide "defense-in-depth" protection. The moves came after attackers on Friday used a recently leaked attack tool developed by the National Security Agency to virally spread ransomware known as "WCry" or "WannaCrypt." Within hours, computer systems around the world were crippled, prompting hospitals to turn away patients while telecoms, banks, and companies such as FedEx were forced to turn off computers for the weekend. The chaos surprised many security watchers because Microsoft issued an update in March that patched the underlying vulnerability in Windows 7 and most other supported versions of Windows
 
None of the articles tell how the computers were infected. Did some idiot in each of these computer systems click on a junk mail reading "I am a Prince from Nigeria and wish to give you $3 million dollars" ?
 
The patch was released in March, namely http://redirect.viglink.com/?format...ting&txt=Microsoft Security Bulletin MS17-010 which addresses the vulnerability that these attacks are exploiting. Basically, you can get your computer patched up through either Windows Update or install manually through http://redirect.viglink.com/?format...artest Computing&txt=Microsoft Update Catalog. Microsoft also made an exception and released security patches for their legacy operating systems such as Windows XP, Vista, and Windows Server 2003. You can find all individual patches and download them from Microsoft Update Catalog website.

http://redirect.viglink.com/?format...omputing&txt=Microsoft Update Catalog website

If you have Windows Update set up to install updates automatically, your computer is most likely already patched up. But how do I now if that’s the case?

You can go to “View update history” in Windows Update in Control Panel to find out. Here are the list of KB numbers for this patch on various Windows systems.

Windows Vista & Windows Server 2008: KB4012598
Windows 7 & Windows Server 2008 R2: KB4012212 (Security Only) or KB4012215 (Monthly Rollup)
Windows 8.1: KB4012213 (Security Only) or KB4012216 (Monthly Rollup)
Windows Server 2012: KB4012214 (Security Only) or KB4012217 (Monthly Rollup)
Windows Server 2012 R2: KB4012213 (Security Only) or KB4012216 (Monthly Rollup)
Windows 10
First release: KB4012606
Version 1511: KB4013198
Version 1607: KB4013429
Windows 2016: KB4013429

http://redirect.viglink.com/?format...eral Security - Smartest Computing&txt=SOURCE
 

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