Just so long as you didn't reboot. https://www.bit-tech.net/news/bits/2017/05/22/wanakiwi-decrypts-wannacry/1
Not much hope for other OSes, though. https://www.bit-tech.net/news/bits/2017/05/19/wannacry-key-recovery-tool/1
Microsoft displeased with the NSA. https://www.bit-tech.net/news/bits/2017/05/15/wannacry-malware/1
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