Updating the Firmware

The Key Croc ships with a basic key-logging firmware. Unlock additional features like Cloud C2, advanced keystroke injection and payloads by following this guide.

STEP 1: DOWNLOAD THE LATEST FIRMWARE

Download the latest Key Croc firmware from downloads.hak5.org. Do not extract the .tar.gz archive (Safari users: disable automatic unzipping). Do not proceed until the file checksum has been verified against the SHA256 listed from the download site as a damaged file will corrupt the device.

STEP 2: CONNECT THE KEY CROC IN ARMING MODE

Plug the Key Croc into your computer. After 30 seconds, press the arming button with a paperclip or similar. The LED will blink blue, and a KeyCroc USB flash drive will appear on your computer.

STEP 3: COPY THE FIRMWARE TO THE KEY CROC

Copy the downloaded .tar.gz upgrade file to the root of the KeyCroc drive. When the firmware file copy is complete, safely eject the KeyCroc drive.

STEP 4: UNPLUG AND REPLUG THE KEY CROC

Unplug and replug Key Croc. The LED will show a red/blue pattern for about 10 minutes. DO NOT unplug the Key Croc during this process as doing so irreparably damages the device.

When the firmware upgrade is complete the device will reboot, indicated by a green LED. Your Key Croc is now up to date. If the Key Croc does not automatically reboot, wait 5 minutes after the LED has turned off, then unplug and replug. Version may be verify form version.txt on the root of the KeyCroc flash disk.