Fusion's swap wallet (0x8e6bDa71f3f0F49dDD29969De79aFCFac4457379) was compromised on September 28, 2019, with attackers stealing 10M native FSN and 3.5M ERC20 FSN tokens (~$6.4M total). Investigation determined the private key was stolen and suggested potential inside involvement. Some stolen tokens were wash-traded across exchanges before being frozen, causing FSN price to crash 50% within hours.