Snake, also known as Turla and Uroburos, is backdoor malware that has been around and infecting Windows systems since at least 2008. It is thought to be Russian governmental malware and on Windows is highly-sophisticated. It was even seen infecting Linux systems in 2014. Now, it appears to have been ported to Mac.
On Friday a sophisticated Mac Trojan was discovered, called OSX.Dok, which installs malware designed to intercept all HTTP and HTTPS traffic. This morning, Adam Thomas, a Malwarebytes researcher, found a variant of the OSX.Dok dropper that behaves altogether differently and installs a completely different payload.