The KeyGrabber USB is an advanced USB hardware keylogger with a huge internal flash disk, organized as a file system. Text data typed on the USB keyboard will be captured and stored on the internal flash drive in a special file. This data may be retrieved on any other computer with a USB port and keyboard, by switching to flash drive mode. The keylogger will pop up as a removable drive, giving instant access to all captured data. The KeyGrabber USB is 100% transparent for computer operation and no software or drivers are required.
This section contains concise information on basic keylogger handling. If you need detailed instructions, please refer to sections Recording keystrokes and Viewing recorded data.
To record keystrokes, plug the device in-between the keyboard and USB port.
To view recorded data, plug the device in-between the keyboard and USB port, and press the 3-key combination simultaneously (by default K, B, S)
The keylogger will pop up as a removable drive, containing the file LOG.TXT. This file will contain all recorded keystroke data.
Installation of the KeyGrabber USB is quick and easy. Simply plug it in between the USB keyboard and the USB port. No software or drivers are required. The USB hardware keylogger will start recording all data typed on the keyboard to the internal flash disk. Once recording starts, new data will be appended to the end of the log file. The device is completely transparent for computer operation.
Step 1. Disconnect the USB keyboard from the USB port at the computer or hub. This can be done even with the computer up and running.
Step 2. Connect the hardware USB keylogger between the USB keyboard and the USB port. Keystroke logging will start automatically.
Note: If an external USB hub is being used, connect the keylogger between the hub and the USB keyboard.
Once keystroke data has been recorded, it may be retrieved on any computer with a USB port. This is done by switching to flash drive mode. The KeyGrabber USB and keyboard should be connected in the same way, as during normal recording.
Each device has a built-in 3-key combination (by default K, B, S). Press these 3 magic keys simultaneously to trigger flash drive mode.
After a few seconds, the hardware keylogger will automatically get detected as a mass storage device. The operating system will use the standard built-in mass storage driver (MS Windows 7 in the following examples).
Depending on the drive letters available, the device will be visible as a new drive, for example F:. Use the systems file manager to browse this disk (for example Explorer). The keyboard will be disconnected and unavailable, so the mouse must be used to browse the disk.
The removable disk will contain the file LOG.TXT with a text log of all captured data. Keystroke data is formatted in the same as it would appear on the screen, with special keys in brackets ([Ent], [Esc], [Del] etc.). This file can be viewed and searched with any text editor, such as Notepad or MS Word.
During flash drive mode, the USB keyboard is inaccessible, and usually the mouse is the only operating device. Therefore it is a good idea to copy the file to the hard drive, and restore standard operation. Erasing and editing the file LOG.TXT is obsolete, because the flash disk has a huge memory worth of years of intensive typing.
Switching back to standard mode can be achieved by a safe software removal of the flash disk. Use the systems standard disk removal procedure. For MS Windows, left-click on the Safe Removal icon in the system tray and select the appropriate drive. Some systems will require to unplug the reconnect the keylogger.
Note: During the first switch to flash drive mode, the operating system can ask for drivers. In such case choose automatic driver installation (usually default option).
Note: While in flash drive mode, the USB keyboard is disabled. Use the mouse to operate the system. If mouse operation is dependent on the keyboard (i.e. wireless desktop or USB keyboard with mouse attached to it), connect the keyboard/mouse combo to a different USB port after switching to flash drive mode.
Flash drive mode allows several standard examination and maintenance procedures to be performed through the operation system. The most common operations are described below with MS Windows as an example operating system.
Copy the log file LOG.TXT to the hard drive and restore standard mode, by disconnecting the flash disk. Open LOG.TXT in any text editor, such as Notepad or MS Word. The entire log file may be viewed, or searched using the text editor built-in Find option (CTRL-F). To locate WWW & E-mail addresses, define the search phrase as ‘www’, ‘.com’, ‘@’ etc.
A flash disk capacity of several megabytes makes memory erasing obsolete. This is equivalent to several years’ worth of intensive typing. However, it is possible to keep the log file clean by erasing it occasionally. This can be achieved by the standard system file delete procedure while in flash drive mode. For MS Windows active the context menu for the log file and select Delete. A new log file will be created on the next power-up.
Flash disk formatting will erase all data present, including the log, configuration, and layout files. For MS Windows activate the flash drive context menu and choose Format. Make sure the correct disk is selected and check the option Quick Format.
Disconnect and reconnect the keylogger from the USB port immediately after formatting has finished. Default settings will be restored and a new log file will be created.
The KeyGrabber USB may be configured through the file CONFIG.TXT, placed in the flash drive root folder. Use any text editor to prepare such a configuration file, containing the following text:
Copy this file to the root folder in flash drive mode. The new configuration will be loaded on next power-up.
The following list presents the most common configuration options. All variable and value strings are case insensitive.
Password sets the 3-key combination for triggering flash drive mode. Any three-letter key combination is allowed (sequence is irrelevant). The password setting is national-layout independent. Default value is KBS.
LogSpecialKeys sets the logging level for special keys, such as Enter, Escape, F1...F12 etc. Special keys are logged in brackets, i.e. [Ent]. Allowed values are None (only text is logged), Medium (text with basic function keys are logged), and Full (text with all special keys are logged). Default value is Medium.
DisableLogging allows to disable keystroke logging, however does not affect mode switching. Allowed values are Yes (logging disabled) and No (logging enabled). Default value is No.
DisableLayout allows disabling the currently loaded layout, without having to delete the layout file. Allowed values are Yes (layout disabled) and No (layout enabled, if present). Default is No.
MacMode allows to enable/disable Mac Mode on devices with the MCP option. Mac Mode is a special mode ensuring full compatibility with all Apple keyboards. Allowed values are Yes (Mac Mode enabled) and No (Mac Mode disabled). Default value is Yes.
Encryption enables flash disk encrypting. Encryption will ensure full confidentiality of the stored data, even if the device is physically tampered with. Allowed values are Yes (encryption enabled) and No (encryption disabled). Default is No.
Important: toggling the encryption setting will format the entire flash disk. All data will be lost, including the configuration and layout files!
An example configuration file contents is shown below:
The Mac Compatibility Pack (MCP) is a hardware enhancement ensuring full compatibility with Apple Mac computers and keyboards. Several Apple keyboards are USB High-Speed and Low-Speed combos, creating a challenge for all types of USB keyloggers. The aluminum Apple A1243 and A1242 are typical examples:
The KeyGrabber USB with the Mac Compatibility Pack features a special Mac Mode (enabled by default), which will convert the keystroke data stream to USB Full-Speed, ensuring proper operation of the keyboard and logging of all keystrokes. Mac Mode is compatible with standard keyboards too, so the KeyGrabber does not have to be reconfigured.
When enabled, Mac Mode will add an additional pass-through USB hub to the system. If this is undesired, Mac Mode can always be disabled, restoring normal operation. To disable Mac Mode, open the configuration file CONFIG.TXT (see section Configuration options) and add the following entry:
It is possible to enable a national layout for language-adapted keyboards, such as French, German etc. This will allow national characters to get logged properly (including those with Alt Gr), such as ö, æ, ß, ó etc. The following example demonstrates the advantages of applying the German national layout.
Text logged without layout
Kezlogger )PS-2 / USB=
Text logged with layout
KeyLogger (PS/2 & USB)
To enable a keyboard layout, the appropriate layout file named LAYOUT.USB must be placed on the flash disks root folder. The file must be copied in flash drive mode. Layout files may be obtained from the CD-ROM attached with the device.
To enable the layout, safely remove the flash disk. On power-up, the layout file will be loaded automatically.
4.5 V – 5.5 V DC (drawn from the USB port)
Max. power consumption
65 mA (0.33 W)
Maximum burst log speed (approx.)
Maximum continuous log speed (approx.)
USB HID-compatible keyboard (Low-speed, Full-speed, High-speed)
Maximum log read speed
Dimensions inc. connectors (L x W x H)
53 mm x 20 mm x 12 mm (2.1" x 0.8" x 0.5")
The KeyGrabber USB will not work with the following hardware configurations:
The keyboard is not responding
The keyboard connector or the keylogger connector is not inserted firmly. Please check the connection with the USB keyboard and port.
The keylogger does not switch to flash drive mode
Please check the following:
Problems with logging national characters
Please check if you have downloaded the correct layout file and copied it to the flash disk root directory? If not, please check the National keyboard layouts section.
The keyboard doesn’t work in flash drive mode
This is normal behavior. In flash drive mode, the keylogger will install the removable disk instead of the keyboard. Use the mouse to copy the log file to the hard drive, then restore normal operation. Alternatively, you may connect the keyboard to a different USB port after switching to flash drive mode.
The mouse and keyboard don’t work in flash drive mode
This can happen on wireless keyboards and keyboard/mouse combos. In flash drive mode, the keylogger will install the removable disk instead of the keyboard/mouse combo. To get around this, connect the keyboard/mouse to a different USB port after switching to flash drive mode.
I’ve checked everything, nothing helps!
If you are still experiencing problems, please do the following:
[Esc] - Escape
[F1] - F1
[F2] - F2
[F3] - F3
[F4] - F4
[F5] - F5
[F6] - F6
[F7] - F7
[F8] - F8
[F9] - F9
[F10] - F10
[F11] - F11
[F12] - F12
[Ctl] - Control
[Alt] - Alt
[Ins] - Insert
[Hom] - Home
[PUp] - Page Up
[PDn] - Page Down
[Del] - Delete
[Win] - Win
[Aps] - Apps
[Cap] - Caps Lock
[Ent] - Enter
[Bck] - Backspace
[Tab] - Tab
[Prn] - Print Screen
[End] - End
[Scr] - Scroll Lock
[Up] - Up
[Dwn] - Down
[Lft] - Left
[Rgh] - Right
[Num] - Num Lock
[-N] - - (num)
[+N] - + (num)
[.N] - . / Delete (num)
[/N] - / (num)
[*N] - * (num)
[0N] - 0 / Insert (num)
[1N] - 1 / End (num)
[2N] - 2 / Down (num)
[3N] - 3 / Page Down (num)
[4N] - 4 / Left(num)
[5N] - 5 (num)
[6N] - 6 / Right (num)
[7N] - 7 / Home (num)
[8N] - 8 / Up (num)
[9N] - 9 / Page Up (num)
[Pwr] - Power
[Slp] - Sleep
[Wke] - Wake
No responsibility is taken for any damage, harm or legal actions caused by misuse of this product. The user should follow the guidelines contained in this document, otherwise no liability will be assumed. It is the user's responsibility to obey all effective laws in his/her country, which may prohibit usage of this product.
In most countries the usage of a keylogger is fully legal as long as a clear notice is displayed, informing the user of the monitored equipment about the presence of a keystroke logger. We encourage the use of this equipment only for the purpose of monitoring your own computer, especially for protecting children against online hazards. It is NOT LEGAL to use a keylogger for the purpose of intercepting third party data, especially passwords, banking data, confidential correspondence, etc. If in doubt, please seek legal advice before using a keystroke logger. A good starting point is the U.S. Department of Justice Letter on Keystroke Monitoring and Login Banners, according to which a clear notice should be displayed, warning that user keystrokes may be logged.