One of the runners of the world's largest known botnet was captured in Singapore. Be careful with the freeware, especially if you don't have a lot of experience in these things.
U.S., allies arrest Chinese national behind global 911 S5 botnet (msn.com) (https://www.msn.com/en-us/news/world/u-s-allies-arrest-chinese-national-behind-global-911-s5-botnet/ar-BB1nibDh?ocid=msedgdhp&pc=DCTS&cvid=485ebc5581014699b38d4609426c9c5a&ei=37)