Bart

You wanted an example of working x86 knowledge and making bad crypto mistake. I gave you one. Petya v1 truncated 32 bit ints to 16 bit ints.

yes, it is very unlikely that they were so incredibly stupid to not understand this much basic things. those that Janus did were non trivial

in addition, there was enough material online about Petya and how it's Salsa key is preserved

yet, we cannot exclude the option that they did it for money. they may not have cared for a sustainable business model

maybe it was just their one time stand - to release once, collect as much money as possible and get away with it

but this is just one of the hypothesis, others (like disruption) are also possible

another possibility: the recent outbreak can be an attempt of a competitive gang to destroy the reputation of #Petya