This ruleset takes a daily list of the known CnC? Servers as researched by Shadowserver.org and converts them into Snort signatures, Bro Signatures, and Firewall rules.
Rules are available here:
Shadowserver Botnet Command and Control Server Rules (ShadowServerCC):
Sid Range info:
2404000-2404999 Shadowserver.org Bot C&C List — Updated Daily
2405000-2405999 Shadowserver.org Bot C&C List with fwsam Drop Statements– Updated Daily
Firewall Ruleshttp://www.emergingthreats.net/fwrules