Help about keylogger.

Question

Hi, does anyone know how to create an application using C# that can't be detected by a keylogger. Any kind of help would be appreciated. Thank You

Danatas Gervi · Answer

As you can see in article, .NET (managed code) cannot be used for "GLOBAL" hook for all programs in Windows. :-( Lets wait for reliase of managed OS. :-)

Kiko De leon · Answer

Hi! Thank You so much for your reply.. :)

Danatas Gervi · Answer

May be you need a message hook? here is example. Normal 0 false false false EN-US X-NONE HE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; text-align:right; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} This is the simplest way to get global hook in your own form: namespace FormGlobalHook { public partial class Form1 : Form { public Form1 () { InitializeComponent (); Application . AddMessageFilter ( new GlobalHook ()); } } public class GlobalHook : IMessageFilter { public bool PreFilterMessage ( ref Message msg ) { const int WM_KEYDOWN = 0x100 ; const int WM_SYSKEYDOWN = 0x104 ; //const int WM_KEYUP = 0x101; //const int WM_SYSKEYUP = 0x105; if (( msg . Msg == WM_KEYDOWN ) || ( msg . Msg == WM_SYSKEYDOWN )) { char pressedKey = ( char ) msg . WParam ; File . AppendAllText ( @"c:\spy.txt" , pressedKey . ToString ()); } return false ; } } }

Help about keylogger.

Answers (3)