Since nothing really was done about the previous attacks (only a band-aid), the attackers now simply use two algos to fork the chain for their own use and are gaining millions:




Both algos, scrypt and lyra2re can be rented easily for a few bucks at nicehash, they simply send one block scrypt, after that a block lyra2re and so on and all with manipulated timestamps thus lowering diff to lowest possible mining several blocks per minute like this