Complex sentence: The purported infection vector, EternalBlue, was initially revealed as a part of the United States National Security Agency (NSA) Equation group toolkit by the hacker group, The Shadow Brokers released the code for ETERNALBLUE on April 14,2017.
Split into simpler sentences: The purported infection vector, EternalBlue, was initially revealed by the hacker ground The Shadow Brokers as a part of the United States National Security Agency Equation Group toolkit. The hacker group released the code for ETERNALBLUE on April 14,2017.