- If you have none of those patches, download and install the March 2017 Security Only Quality Update for Windows 8.1 (KB4012213) for 32-bit or 64-bit. See the note above about security-only patches.
- Make sure your PC is up to date with the latest version of Windows. Learn more about Windows Update. Turn on Windows Security to help protect you from viruses and malware (or Windows Defender Security Center in previous versions of Windows 10).
- Open the Control Panel or Settings menu, then find the Recovery option (under System and Security in Windows 7, and under 'Update and Security' in Windows 8.1 and 10).
- Windows 8.1 Ransomware
- Windows 8.1 Ransomware Patch Download Windows 10
- Windows 8.1 Ransomware Patch Download Windows 7
- Windows 8.1 Ransomware Patch Download Torrent
- Windows 8.1 Ransomware Patch Download Free
Following the massive Wana Decrypt0r ransomware outbreak from yesterday afternoon, Microsoft has released an out-of-bound patch for older operating systems to protect them against Wana Decrypt0r's self-spreading mechanism.
Microsoft provides an emergency update for unsupported Windows XP and Windows 8 machines in the wake of Friday’s WannaCry ransomware outbreak. Microsoft Releases XP Patch for WannaCry. WannaCry Ransomware Patch Offline Installer. WannaCry ransomware that spreads like a worm worldwide has become a serious issue for individuals as well as organizations running Microsoft Windows on their systems.
The operating systems are Windows XP, Windows 8, and Windows Server 2003. These are old operating systems that Microsoft stopped supporting years before and did not receive a fix for the SMBv1 exploit that the Wana Decrypt0r ransomware used yesterday as a self-spreading mechanism.
That mechanism is a modified version of the ETERNALBLUE exploit, an alleged NSA hacking tool leaked last month by a group known as The Shadow Brokers.
Original MS17-010 patch didn't include XP/Win8 fixes
Microsoft had released a fix for that exploit a month before, in March, in security bulletin MS17-010. That security bulletin only included fixes for Windows Vista, Windows 7, Windows 8.1, Windows 10, Windows Server 2008, Windows Server 2012, and Windows Server 2016.
Windows 8.1 Ransomware
As the SMBv1 is a protocol that comes built-in with all Windows versions, the computers which did not receive MS17-010 remained vulnerable to exploitation via Wana Decrypt0r's self-spreading package.
'Given the potential impact to customers and their businesses, we made the decision to make the Security Update for platforms in custom support only, Windows XP, Windows 8, and Windows Server 2003, broadly available for download,' Microsoft said in a statement. 'This decision was made based on an assessment of this situation, with the principle of protecting our customer ecosystem overall, firmly in mind.'
Researchers believe that Wana Decrypt0r — also referenced online as WCry, WannaCry, WannaCrypt, and WanaCrypt0r — infected over 141,000 computers.
Windows 8.1 Ransomware Patch Download Windows 10
While unconfirmed, many believe older Windows XP and Windows Server versions were the bulk of the infections pool, as they had no way to protect themselves.
Windows 8.1 Ransomware Patch Download Windows 7
Patch systems and disable SMBv1 where possible
Windows 8.1 Ransomware Patch Download Torrent
Besides installing these out-of-band updates — available for download from here — Microsoft also advises companies and users to disable the SMBv1 protocol, as it's an old and outdated protocol, already superseded by newer versions, such as SMBv2 and SMBv3.
Windows 8.1 Ransomware Patch Download Free
The current Wana Decrypt0r outbreak has been stopped last night after a security researcher found a kill switch. This is only temporary, as the attackers could release a new version of this threat. This is why patching the SMBv1 exploit is a better solution.
For those affected, you can discuss this ransomware and receive support in the dedicated WanaCrypt0r & Wana Decrypt0r Help & Support Topic. Bleeping Computer also published a technical analysis of the Wana Decrypt0r ransomware.