I found this topic when I googled "trojan horse lxducoms.exe" because I too had this infection. It is a locked topic on this website but I am thankful it googled.
My computer had unexplained performance issues where the fan would run at high speed for about 15 minutes with high CPU usage, a nd my mouse would go haywire and close open programs.
I ran Process Explorer to see what was using so much memory. I clicked Process>Check VirusTotal.com, and next to Printer Communication Monitor (lxducoms.com) was a red 1/56 and when I clicked that, it showed Trojan Horse Agent2.guf.
When I uninstalled and reinstalled my Lexmark printer, it disappeared, and I am now able to print, and copious amount of CPU has stopped. When I reinstalled my printer 3 mos ago is when it started.
In reading the original post from sunsetrendeznous on this site, and doing a regular search, it is pretty apparent that this, and other trojans affecting lxducoms.exe,are specific to Lexmark products. I have a 5600-6600 printer.
So anyone with a Lexmark printer, be aware.