https://www.whois.com/whois/poloniex.comDunno if this info will help at all
DOMAIN INFORMATION
Domain:poloniex.com
Registrar:NetEarth One Inc. d/b/a NetEarth
Registration Date:2014-01-10
Expiration Date:2019-01-10
Updated Date:2015-12-13
Status:clientTransferProhibited
Name Servers:chuck.ns.cloudflare.com
uma.ns.cloudflare.com
REGISTRANT CONTACT
Name:Tristan D'Agosta
Organization:Poloniex, Inc.
Street:5 Middlesex Ave, 4th Floor, Suite 400
City:Somerville
State:Massachusetts
Postal Code:02145
Country:US
Phone:+1.3025186536
Email:email@poloniex.com
ADMINISTRATIVE CONTACT
Name:Tristan D'Agosta
Organization:Poloniex, Inc.
Street:5 Middlesex Ave, 4th Floor, Suite 400
City:Somerville
State:Massachusetts
Postal Code:02145
Country:US
Phone:+1.3025186536
Email:email@poloniex.com
TECHNICAL CONTACT
Name:
Tristan D'AgostaOrganization:Poloniex, Inc.
Street:5 Middlesex Ave, 4th Floor, Suite 400
City:Somerville
State:Massachusetts
Postal Code:02145
Country:US
Phone:+1.3025186536
Email:email@poloniex.com
Other emails they have:
marketing@poloniex.comsupport@poloniex.comadmin@poloniex.comemail@poloniex.comtristan@poloniex.com Yes that actually may be quite useful.
I bet gleb could trace that rat to his current hiding hole.