Bash Vulnerability Part 6: YABU - Yet Another Bash Update - Doug Burks - Security Onion
If you run Snort this might be of interest to you.
Shellshock in the Wild - Micheal Lin, James Bennett, and David Bianco - FireEye
FireEye has been keeping an eye (pun intended) on Shellshock activity and has a list of how the exploit is being used.
This post first appeared on Exploring Information Security.