Update ua.txt
Update ua.txt

```
2850613 - ETPRO TROJAN Win32/Lmbmiad CnC User-Agent (ve3xtest) (trojan.rules)
2850616 - ETPRO TROJAN Win32/Lmbmiad CnC User-Agent (noandk) (trojan.rules)
```
stamparm/maltrail,stamparm/maltrail,stamparm/maltrail,stamparm/maltrail