In an impressive operation, a Russian APT reportedly targeted a Washington, DC network after daisy chaining through a sequence of neighbouring networks and devices in 2022. The trick: they may have done so without ever using any local operatives.
This is a movie-like kind of operation and speaks to the immense challenges in defending against very well resourced, motivated, and entrepreneurial adversaries.
Wired has a good and accessible article on the cyber activity. The full report is available at Volexity’s website; it’s well worth the read, if only to appreciate the tradecraft of the adversaries as well as Veloxity’s own acumen.