How UK Spies Hacked a European Ally and Got Away with It 8 years ago
Hmm seems like Belgacom has had several visits from the NSA and/or GHCQ. The most likely reason for these friendly visits is that Belgacom manged(manages?) a couple of submarine cables in the middle east and north Africa. It's public knowledge that either the NSA or GCHQ had infected their core routers/switches.
When that story first came to light, what they didn't tell you is that the NSA was also in Deutsche bank and several other financial institutions. Perhaps they still are.