Cha Cha Chopping Down The China Chopper Webshell is a malware analysis report for BackDoor.Chopper.1 aka caidao.exe.
You can download it from the following link: https://packetstormsecurity.com/files/download/122855/china-chopper.pdf
Source: https://packetstormsecurity.com/files/122855/Cha-Cha -Choppin-Down-The-China-Chopper-Webshell.html