What is com.onlineapplicationrequest.AppRequest? Along the same lines as this other question, I've found a user agent I don't recognize on my system.  The label is com.onlineapplicationrequest.AppRequest, and the command it's running is:


  "/Users/jstrout/Library/Application Support/AppCommon/AppRequest"
  --protect


The ~/Library/Application Support/AppCommon directory looks like this:

drwxr-xr-x   11 jstrout  staff      374 Dec 27  2016 .
drwxrwxrwx  195 jstrout  staff     6630 Apr 11 09:33 ..
-rw-r--r--    1 jstrout  staff       37 Mar  8  2015 .cid
-rw-r--r--    1 jstrout  staff        6 Jan  7  2016 .cnid
-rw-r--r--    1 jstrout  staff       10 Aug 24  2016 .idate
-rw-r--r--    1 jstrout  staff       37 Mar  8  2015 .isn
-rw-r--r--    1 jstrout  staff        0 Dec 15  2016 .upgrade-ff-1.52.4
-rw-r--r--    1 jstrout  staff        0 Dec 27  2016 .upgrade-ff-1.54.2
-rw-r--r--    1 jstrout  staff        0 Dec 15  2016 .upgrade-gc-1.52.4
-rw-r--r--    1 jstrout  staff        0 Dec 27  2016 .upgrade-gc-1.54.2
-rwxr-xr-x    1 jstrout  wheel  1240620 Dec 27  2016 AppRequest


Again, the googles have completely failed me on this one.  http://onlineapplicationrequest.com/ exists but appears unused.  Is this more malware?
Oops -- I posted too soon.  I have since run Malwarebytes Anti-Malware (thanks to a suggestion on my other post), and this file is identified as an instance of "Adware.Spigot".

I've been laboring under the belief that, as a Mac user who avoids the shady back alleys of the internet, I didn't have to worry about malware.  But apparently that's not quite true!