SckTool was designed to allow you to easily send text and binary data to a server for testing/debugging purposes. Several features it includes are: Multiple clipboards The current contents of the send buffer data window can be swapped down to 2 other text pads for quickly cycling between payloads. This feature is implemented as the 1 and 2 buttons next to the port textbox. Data buffer expansion The send buffer supports the use of the [DATA] tag which can be used to expand out the sent data buffer with a predefined length of bytes. This buffer transformation can take place either OnSend, with the check box option, or immediately in the textbox by the use of the now button. This feature is included so you can easily add an exact number of known bytes. Binary data sending The send buffer textbox supports %xx hex character encoding to send non-printable characters. The % escape character can be specified by the user in case they want more readable output such as by using the _ or . characters. Data File sending Instead of sending a databuffer, analysts can send binary files. Simply drag and drop the file into the send file textbox and click the Load file button to load it into memory. You can optionally also reset the send buffer size to a specific value in case data packets must match a specific size. Tmp dir file listing If exploring file upload features of backdoors, they will often create the file uploads in %TEMP%. This file listbox can be manually refreshed to watch for such file creation, and can display the filesize of selected files. This application was first developed while analyzing MyDoom.A, B and C backdoors and has proven useful throughout a series of other analysis.