Botnet / malicious IP list

[nav1406 () rediffmail com]

Hello Group,

We are implementing new rules in SIEM tool where we would like to know if any file is getting uploaded to suspected 
botnet IP by analyzing web proxy logs. We are using dump of IPs from ET (emerging threats).
Question is how updated the list on ET is and how often should we check for any changes to this IP list. Do we have 
similar sites that can rely on for similar information.

Thanks in advance.

Navin.
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