Christo Grozev on Twitter: "We first noticed her thanks to a super useful database shared with us by @cpartisans: the border crossing records of Belarus. We knew the passport ranges of GRU and FSB spies, so we decided to search in that data-set by partial matches, leaving the last 3 digits out as wildcards." / Twitter
https://twitter.com/christogrozev/status/1563184319350591490