Detection URL:Blacklist

This will ONLY appear when a network connection is enabled otherwise its not found by avast.

Threat name: URL:Blacklist
URL: hxtp://104.155.207.188/win.pac
Process: C:\Program Files\Avast Software\Avast\AvastUI.exe
Detected by: Web Shield
Status: Connection Aborted

&

Threat name: URL:Blacklist
URL: hxtp://104.155.207.188/win.pac
Process: C:\Windows\System32\svchost.exe
Detected by: Web Shield
Status: Connection Aborted

ive ran scan after scan, used Avast, spybot, malwarebytes, booted to a linux partition and scanned with ClamAV and it finds nothing but it still remains. how do I find this and remove it to stop this message once and for all outside of removing the windows virus and going back to linux?

This is happening to me as well. The exact same thing.

RTB trojan-backdoor, read here: https://www.bleepingcomputer.com/forums/t/771229/rtp-detection-on-malwarebytestrojanbackdoor/ as MBAM also detects this malware.
Did not you notice that -http:// and not -https:// is an insecure connection?

9 security vendors detect: https://www.virustotal.com/gui/url/47ba015d9b7b182c540052fe7f40cfcbb42c9cdad850939cb9dfc738ba8a1da4

and

Joe Sandbox Analysis:

Verdict: MAL
Score: 56/100
Classification: -mal56.win@35/183@3/8
Domains: -accounts.google.com -clients.l.google.com -googlehosted.l.googleusercontent.com
-clients2.googleusercontent.com -clients2.google.com
Hosts: 142.250.185.206 192.168.2.1 104.155.207.188 142.250.185.193 239.255.255.250 192.168.2.23 142.250.186.77 127.0.0.1

HTML Report: https://www.joesandbox.com/analysis/624161/0/html
PDF Report: https://www.joesandbox.com/analysis/624161/0/pdf
Executive Report: https://www.joesandbox.com/analysis/624161/0/executive
Incident Report: https://www.joesandbox.com/analysis/624161/0/irxml
IOCs: https://www.joesandbox.com/analysis/624161?idtype=analysisid

polonus (volunteer 3rd party cold recon website security-analyst and website error-hunter)

The same thing happened to me.
Fortunately, managed to removed.
Rom the settings level I enter the network and the Internet. I removed the URL from the automatic proxy configuration. :wink: