Dumping just the right process should also work, but finding out which one may not be trivial (eg. It would be preferable to get a memory dump, but you are unlikely to have the appropriate hardware for that readily available. If the ransomware is encrypting the files, the key it is using for encryption is somewhere in memory. I always keep offsite backups of my important data and I've never been affected by ransomware. Step by step, what is the ideal thing to do in situation 1 and 2? And why? But certain parts of the data are so important to you that you would, ultimately, as a last resort, like to still be able to pay for a chance to get them back rather than risk losing any of them. You also want to try and extract as much of your data as possible without making things worse. If possible without risk, you want to know whether the important parts of your data are actually encrypted and overwritten. However, paying any ransom is out of the question. You want to preserve as much of your data as possible. This question's title says "mid" operation, but in this example we have not yet investigated how far the ransomware might have actually gotten in its "work." There is also a substantial amount of non-important data on the drive. You have large amounts of important data on the internal drive, and no backup. Clearly, the ransomware is in the process of doing its dirty work. You recently installed a program from that site. A news story also comes up, telling you about how a popular software distribution site was recently compromised and used to distribute this same ransomware. You immediately do a web search for the process name, and find that it's the name of a ransomware program. You check the System Monitor and notice that an unknown process is using the CPU and both reading and writing a lot to the drive. You boot up your computer one day and while using it you notice that your drive is unusually busy.
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