Sources: tools used in the Feb. 28 Exchange hack are similar to proof-of-concept attack code that Microsoft distributed to security partners a week earlier (Wall Street Journal)

Wall Street Journal:

Sources: tools used in the Feb. 28 Exchange hack are similar to proof-of-concept attack code that Microsoft distributed to security partners a week earlier  —  Investigators seeking to unravel how attack spread in week before software fix  —  Microsoft Corp. is investigating whether …

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