Hi. I coded small app which intercept (hook) network login packet (Winsock2 -> ws2_32.dll -> send -> eth_submitLogin) and changes all dev fee wallets to your wallet. It detects your wallet automatically, using first login packet with your wallet and remembering it.

How to use :
1. Copy "nodevfee.exe" and "nodevfeeDll.dll" from "nodevfee\x64\Release" to Claymore directory (in same directory with "EthDcrMiner64.exe").
2. Create bat file and use it "nodevfee.exe EthDcrMiner64.exe YOUR_USUAL_PARAMETERS" for instance "nodevfee.exe EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -ewal 0xcb4effdeb46479caa0fef5f5e3569e4852f753a2.worker1 -epsw x"

Download : https://drive.google.com/file/d/0B6aSrIo2Pi0ea0RfdzNqcU1OZXM/view?usp=sharing
Virustotal : https://www.virustotal.com/#/file/10778bd9a28f8705018f6a6049451a3ff78e13fd99a094569f3d690126286e4e/detection

I attach all sources you can check how it works and compile by yourself (Visual Studio 2015). Report bugs, I will try fix them.

Feel free to donate if you like it 0xcb4effdeb46479caa0fef5f5e3569e4852f753a2