I write for the finance and investment website ValueWalk. My post entitled WannaCry, Mixers, And Bitcoin Wallets is now online. Here is an excerpt:
Amid the furor of the August 1 Bitcoin Fork, another interesting thing happened. The individual(s) behind the WannaCry ransomware attack started to empty their bitcoin wallets. The $140,000 worth of bitcoin they originally collected gained about 20% more in value during the split, and it was around that time that the virtual money started to move.
The activity was detected by Keith Collins of Quartz, who used a bot to watch for movement in the accounts. The bot observed the initial withdrawal of $70,000, which was then followed by additional amounts from other bitcoin wallets until all the money was gone.