Hello,
there was “litoralnorte.com.ar/dl/87845682-75e5/nai%2b3.3.exe” have you cleaned it? I suggest to change all passwords and update all systems. Also using afraid.org as DNS may easily cause DNS hijack, because it allows creation of subdomains for other persons. I suggest to change DNS hosting.
IP Block is not usefull here.
IP 200.58.111.40 and others in same CIDR are used by a major argentinian webhosting company (formerly Donweb- Dattatec.com ). This company is used for a very high argentinian websites (majority smallest presence pages) since this is very cheap.
I have accessed to manage files and currently there is not present the file indicated by Milos
I have ordered a change in DNS – will see in the next hours.