So, I'm only just stumbling upon this thread because someone shared it over in the Apple forums. Admittedly, I never remember to conduct scans on my MacBook Pro and the other morning I got an alert that Avast blocked this very threat.
That prompted me to do a scan and I found this same Bitcoin Miner infection in Skype and here >> /System/Library/CoreServices/MRT.app/Contents/Frameworks/libswiftDispatch.dylib. Someone else posted finding it here as well.
Figuring the next move was to delete it, that's what I did. Skype stopped working and needed to be reinstalled. However, I haven't noticed any adverse effects from deleting that one mentioned above. Is there any concern in deleting it? Should I restore the file? I have no clue what it is! But obviously, I don't want to discover some sort of issue down the road...