How did you download the SDK? Online or offline installer? Did you verify your download afterwards using the provided checksum?
Maybe redownloading solves the issue?
Virus scanners are not infallible, to the contrary. Maybe it’s helpful to investigate the definition of Variant.Ulise.141564. As the name suggests, merssh.exe contains a SSH (secure shell) tunnel client. This might classify as trojan horse for overzealous scanners.
What does the built-in Windows Defender have to say when you scan the binary file with it?
Sidenote:
I wouldn’t want to tell you to get rid of Bitdefender but in my opinion the included antivirus / defense tools from Microsoft are all you need. They’ve brought them up to par with today’s security demands years ago.
It’s not uncommon that the intrusive methods of (above all free) virus scanners introduce security vulnerabilities by themselves.
(To be taken with a grain of salt, I might be wrong)