Resolved w7bren.oneproxifier.com to 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11
Resolved extradq.oneproxifier.com to 18.104.22.168, 22.214.171.124
Here are two samples of what appears to be reverse proxy malware. It connects back to the indicated servers and maintains a connection, waiting to relay connections through the infected computer. It appears to only use windows servers for the back connect software.
Samples are located here.