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>To ensure the entire network is discovered, we should start the crawler off with multiple supernode IPs and store all IPs found into a database, then each time we restart the crawler we seed it with the list of IPs found during the previous crawler; repeating this process for a couple of hours ensure all online nodes are found.

This would just discover supernodes though right? Or any node at some point broadcasts as a supernode?

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Yes to your first question, no to your second. He goes on to explain that, "In order to map all workers, we’d need to set up multiple supernodes across the botnet which log incoming connections (obviously every worker doesn’t connect to every supernode at the same time, so it’s important that our supernodes have a stronger presence in the botnet)."

From what I understand the process is:

1. Write a program to pretend to be a compromised peer requesting a connection to a Supernode in order to obtain a peer list of other Supernodes.

2. Recursively crawl for existing Supernodes + the list of Supernode IPs. Store all addresses found.

3. Set up one or more Supernodes and 'infiltrate' the peer list of already established Supernodes. Log incoming connections from Workers.

http://whatis.techtarget.com/definition/botnet-sinkhole

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