DDoS でぃうどすこ攻撃 うげきではありませんでした
diudosu kōgekidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of DDoS攻撃

1. It was not a DDoS attack.

Past/Perfective
Negative
Polite
Formal Register
Computing