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E_D_D_R_W t1_j5zxxv3 wrote

If the other commentor is correct and you're thinking about WannaCry, that's kind of the gist of it. The malware was hard-coded to only do its thing if it couldn't connect to a particular (previously unregistered) DNS domain. Thus registering that domain "triggered" the kill-switch and stopped any future infections of that version of WannaCry. Per wikipedia, later versions didn't have that vulnerability.


L00pback t1_j606gpu wrote

Oh god I hated wannacry. Self-replicating shit was a pain in the ass because lab owners don’t patch shit.