A vigilante hacker has been sabotaging the Emotet malware botnet, replacing a quarter of daily payloads with animated GIFs, stopping victims from being infected (Catalin Cimpanu/ZDNet)

Catalin Cimpanu / ZDNet:
A vigilante hacker has been sabotaging the Emotet malware botnet, replacing a quarter of daily payloads with animated GIFs, stopping victims from being infected  —  Emotet botnet activity goes down as Emotet admins are wrestling with a vigilante for control over parts of their infrastructure.