Escaping a virtual machine isn't unheard of. If I were a betting man then I would place good money that this, being a data dump of a state, could contain state-sponsored 0-days designed to escape such things.
> Users are advised to be extra careful as some directories, like ПОЧТА Приемная, appear to contain large numbers of email attachments. Email attachments are often a vector of malware and phishing attempts, so use caution and tools like Dangerzone (https://dangerzone.rocks/) and others.
> This dataset was released in the buildup to, in the midst of, or in the aftermath of a cyberwar or hybrid war. Therefore, there is an increased chance of malware, ulterior motives and altered or implanted data, or false flags/fake personas. As a result, we encourage readers, researchers and journalists to take additional care with the data.