Found the NujoSystemsBot/2.2 in my logs today:
GET / HTTP/1.1" 200 1707 "-" "NujoSystemsBot/2.2" "example.com"
Only one request. No robots.txt. Google does not know the UA.
IP: 179.36.0.0 - 179.39.255.255
Host: Telefonica de Argentina
Country: Argentina
[edited by: keyplyr at 2:22 am (utc) on Mar 18, 2016]
[edit reason] exemplified referrer & depersonalized IP address [/edit]