missing documentation

I'm using bro version 07a90 .I have read the documentation to know how
the scripts work, and make some change to adapt the analyzers to the net
configuration.But the documentation is missing for 4 script:
code-red,backdoor,stepping and intercon.
The first and the second are enough easy to understand,for the third i
found in internet a your documet "Detecting Stepping Stones" i think may
help me. The problem is the fourth, what does what it serve? and how

Pierfrancesco Porcu.