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hak5
GitHub Repository: hak5/usbrubberducky-payloads
 Path: blob/master/payloads/extensions/exfil_auto_eof_detect.txt
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EXTENSION EXFIL_AUTO_EOF_DETECT

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    REM VERSION 1.1

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    REM AUTHOR: Korben

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    REM_BLOCK DOCUMENTATION

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        USAGE:

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            Call WAIT_FOR_EOF() after starting Keystroke Reflection / HID Exfil

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        TARGETS:

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            Requires reflection of at least 2 lock keys.

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            Intended for use on systems that dont reflect more than 2 lock keys.

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    END_REM

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    REM CONFIGURATION

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    DEFINE #INACTIVTY_TARGET 10

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    FUNCTION WAIT_FOR_EOF()

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        VAR $CURRENT_CAPSLOCK_STATE = $_CAPSLOCK_ON

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        VAR $CURRENT_NUMLOCK_STATE = $_NUMLOCK_ON

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        VAR $PROCESSING = TRUE

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        VAR $INACTIVITY_COUNT = 0

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        WHILE ($PROCESSING)

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            DELAY 20 

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            IF($CURRENT_CAPSLOCK_STATE != $_CAPSLOCK_ON) THEN

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                $CURRENT_CAPSLOCK_STATE  = $_CAPSLOCK_ON

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                $PROCESSING = TRUE

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                LED_G

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            ELSE IF($CURRENT_NUMLOCK_STATE != $_NUMLOCK_ON) THEN

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                $CURRENT_NUMLOCK_STATE  = $_NUMLOCK_ON

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                $PROCESSING = TRUE

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                LED_R

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            ELSE 

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                $INACTIVTY_COUNT = ($INACTIVTY_COUNT + 1)

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                IF ($INACTIVTY_COUNT >= #INACTIVTY_TARGET) THEN

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                    $PROCESSING = FALSE

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                END_IF

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                LED_OFF

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            END_IF

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        END_WHILE

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        LED_G

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    END_FUNCTION

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END_EXTENSION

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