[Xylitol]

Collections of various backdoors (ASP/ASPX) found on compromised servers.
http://en.wikipedia.org/wiki/Backdoor_Shell
----
asp shell
https://www.virustotal.com/file/a516bc5 ... 359447416/

[bsteo]

asp shell
https://www.virustotal.com/file/a516bc5 ... 359447416/

Is ASPX (.NET)

[Xylitol]

aspx:
https://www.virustotal.com/en/file/1b9b ... 370432441/
https://www.virustotal.com/en/file/e7c0 ... 370432443/
https://www.virustotal.com/en/file/abb3 ... 370432443/
https://www.virustotal.com/en/file/c15f ... 370432445/
asp:
https://www.virustotal.com/en/file/eb03 ... 370432445/
https://www.virustotal.com/en/file/3fe4 ... 370432474/
https://www.virustotal.com/en/file/7af5 ... 370432476/
https://www.virustotal.com/en/file/4c56 ... 370432477/
https://www.virustotal.com/en/file/e1d5 ... 370432478/

[kekieres]

It seems it was published quite time ago, around 2010, in a brasilian hacking forum:
hXXp://forum.guiadohacker.com.br/showthread.php?t=7967