Too many address in /ip dns static

RouterOS Beginner Basics
1

H!
I exported the configuration of a routeboard in an rsc file, and i verified there are many mappings created in /ip dns static option:

add address=185.205.209.114 name=asia1.ethermine.org
add address=185.205.209.114 name=asia1.ethpool.org
add address=185.205.209.114 name=asia1.fullhashed.com
add address=185.205.209.114 name=asia2.ethermine.org
add address=185.205.209.114 name=cn.sparkpool.com
add address=185.205.209.114 name=aurorapool.net
add address=185.205.209.114 name=daggerhashimoto.br.nicehash.com
add address=185.205.209.114 name=daggerhashimoto.eu.nicehash.com
add address=185.205.209.114 name=daggerhashimoto.hk.nicehash.com
add address=185.205.209.114 name=daggerhashimoto.in.nicehash.com
add address=185.205.209.114 name=daggerhashimoto.jp.nicehash.com
add address=185.205.209.114 name=daggerhashimoto.usa.nicehash.com
add address=185.205.209.114 name=coinotron.com
add address=185.205.209.114 name=eth.1stpool.com
…

Above is only a part of the addresses, always pointing to the same ip.
These records were included automatically, can I delete this? Is there any impact of this on RB’s performance?

2

Default configuration has none static DNS entries. So you’ll have to find out how these landed on your mikrotik to decide whether it’s OK to delete them or not.

3

I would go one step further, and presume that the router was compromised and do a net install process.
@mkx please email me. PS answered your question in the other thread!

4

Rings a bell, or is unknown ???
..
..
Klembord-2.jpg

5

I did a factory reset and reconfigured the router

6

You should do a netinstall. A simple reset may not remove all compromising components.