Folgendes habe ich gefunden:
"Defacing Tool 2.0 by r3v3ng4ns" is a suite of php based scripts that allows the attacker to send commands to the server primarily with the intent to deface web sites.". In our experience the script is often used to download further malware using wget/curl, or to test for the presence of vulnerable scripts by attempting commands such as 'id' or 'uname'. It seems that the script can also be uploaded to PHP/Apache servers to provide an easily accessible set of utilities for executing commands, searching for files.
Hört sich schon ziemlich schlecht an...
Weitere Informationen:
Know your Enemy: Web Application Threats
Tja, ich zumindest verstehe nichts davon, da ich von Servern etc. keine Ahnung habe, aber vielleicht hilft Dir der Link ja bereits ein wenig weiter.