Loss of bots since may 15, anyone else?

[netix]

Since 15. may I got loss of around 10k bots from total peak.

I was thinking all the time about possible reasons.

Till now may 19. they did not return. What can be the reason? There was no holidays or anything. Can it be windows 11 upgrade? Still very strange, can't be true I guess.

It is a worldmix botnet, normaly such things happens only if they are holidays. Can it be some internet problems?

Someone else got same problem?

 

[yslvintage]

Maybe you got signature from Windows Defender?

 

[dunkel]

dns sinkhole maybe. If you dont use dga or alternative communication channels you can lose all bots

 

[black3508]

What method do you use to keep the bot
Don't you have any backup method?
Like a script that automatically downloads the file every time restart computer?