How does memory work? - Simple question.

[goldenix]

Okey, So I decided to hack firefox.

There is some annoying javascript counting down & I constantly miss the time frame Im given after the countdown. So I thought why not give me msbox after countdown is finished.

So I read this nice guide about memory.

After some struggle I even found a script that can read memory.

$Mem_Read     = _MemoryRead('07F3CE0D', 'Firefox.exe') ; Results 785 

Problem1: The address is changing every time I reload the page or open new tab. But this script only gets value from 1 address. This means I need to scan whole memory.

Problem 2:



How will the memory address look like if I want to read data from first cluster? Then second one? then 45 clusters ahead? Do I just take hex value of 0,1,2,3,45 & vuala I have a memory address of first 4 Bytes?

[MaximilianMayrhofer]

You should probably stop downloading warez.

And the use of the word hack in your post automatically disqualified you from any replies that are not:

1. Mocking of your lack of competence in doing it yourself.
2. Snide... Like mine...
3. Completely irrelevant to the topic of your thread <-- Most common.

[mendhak]

Not sure what you're trying to do, but reading 0,1,2,3 gives you the first 4 bytes, as it says right in the image. Is this a trick question?

[goldenix]

Not sure what you're trying to do, but reading 0,1,2,3 gives you the first 4 bytes, as it says right in the image. Is this a trick question?

No, im not trying to trick anyone, Im just trying to understand how are the memory addresses created or I cant scan for that javascript countdown value in the memory.

so will this work or I still dont understand how to create a memory address?
Will this loop 1 byte at the time through all my memory?

$Total_Memory = '299845504760742' all available psychical memory in bytes.

for $i=0 to $Total_Memory
    
    $Mem_Read     = _MemoryRead($i, 'Firefox.exe')
    
    MsgBox('value',$Mem_Read)
next 

In this image, let say I want to find that value 83. will the memory address look like this?

$Mem_Read     = _MemoryRead('5678', 'Firefox.exe') 

[kleinma]

firefox is open source isn't it? Why don't you just compile your own version with the desired functionality built in???

[goldenix]

firefox is open source isn't it? Why don't you just compile your own version with the desired functionality built in???

Im beginner dude, I dont even understand how most of the programming work. And you want me to rewrite firefox that is written in hell knows in what language just so I get a popup message once the countdown finishes?

Okey lets say, I do it. now I will need to alter the javascript functions I get from the server before displaying it. How do you imagine doing that?

I did some searching & it seems you cant alter javascript functions to begin with.


Anyway, please explain how to create a list of memory addresses in my computer?

[kregg]

Im beginner dude, I dont even understand how most of the programming work...

...Anyway, please explain how to create a list of memory addresses in my computer?

[Shaggy Hiker]

That's hardly a simple question. For one thing, there are LOTS of memory addresses. For another thing, the OS will be creating virtual memory addresses within a process, which will not be the same as physical memory addresses.

You'd have to know the offset of the counter into the address space of the process...if it even exists. Depending on how the counter actually works, it could even reside only in a register and not in memory at all. Not likely, though.

[DeanMc]

Memory is a hard thing to parse, the reason being that it is contextual, unless you know what to look for your just getting random bytes. For instance reading 8 bytes in will give you 8 byte values. There not going to do you any good if you don't know what to convert the value into.

[goldenix]

I know what im looking for, I found this with cheat engine 4 bit, default scan. Since its a countdown I searched for decreasing value & it turns out it starts from 1000 and it takes around 10 minutes to get to 1

virtual memory addresses within a process, sounds darn complicated, hmm cant I I just simplify it by searching whole used memory in my Win XP?

When I did CE scan it took really long. But if I tried to search values between 500 - 999 it was almost instant. So i could try same thing when i code & 10 min. should be plenty of time to find that decreasing value.

Values in memory are stored in Binary right? so I just convert it to decimal & put it into an array & then just see if it has decreased until only 1 value remains. this I can do.

But I dont understand how do memory addresses look like. The guide says I need to search "0x0000000" to "0x7FFFFFFF" But what the hell does it mean? if first address is 0x0000000 then what is next & next after that. How do I determine that?


PS: If you have any reference that may help me to understand this Id appreciate it.

[minitech]

You could take the source HTML and take out the countdown JavaScript. If you don't know JavaScript and HTML, you could just disable JavaScript altogether when you reach the countdown page.

[JuggaloBrotha]

What web site is this for? It sounds like RapidShare's free user's download countdown

[goldenix]

Its easyshare. with its 500 sec cool down. It took me a day once to download 1 file & in the end I still forgot to check back when the countdown finished & was not able to download anything.

As you see I cant simply get the source & replace javascript. & I already tried this btw, it did not work. & I cant use greasemonkey cuz it wont let me modify javascript functions.

So the memory reading is the only solution I came up with.

[si_the_geek]

Why not simply create a separate countdown alarm program, which allows you to input the amount of time?

[goldenix]

hmm, I dont know how exact will this be. I gotta look in to this.

[baja_yu]

Its easyshare. with its 500 sec cool down. It took me a day once to download 1 file & in the end I still forgot to check back when the countdown finished & was not able to download anything.

As you see I cant simply get the source & replace javascript. & I already tried this btw, it did not work. & I cant use greasemonkey cuz it wont let me modify javascript functions.

So the memory reading is the only solution I came up with.

Do you know that there are download managers for those kind of things so you can add a list of files and it will download one at a time as soon as it can? I know there are for rapidshare, and I guess there are for easyshare too (not sure, I dont use either).

[goldenix]

Yes I know, like cryp.tload, but I did not find anything for easyshare.

That external program idea was good, & it gave me even more wonderful idea. Instead of making it external I just made a monkey script with 1 line of code.

setTimeout("alert('Countdown Finish!')",1000*500); 

Now each time I open the page, the countdown will count down & display alert. & I wont need to start any external programs.

Well see how it goes. it seems the script continues to run if I restart the fox or close this tab & open new one, while countdown has not finished & then it simply wont work.

[Shaggy Hiker]

Just for your information, those memory addresses are hexadecimal numbers (base 16). They are distinguished by starting with either 0x or &H, depending on the representation. Decimal numbers (base 10) have 10 distinct digits with which we are all familiar. Hexadecimal has to have 16 distinct digits. Since we have 10 already, there just has to be 6 more, and for those we use A-F. Therefore, the digits in decimal are:

0, 1, 2, 3, 4, 5, 6, 7 , 8, 9

while in hex, the digits are:

0, 1, 2, 3, 4, 5, 6, 7 , 8, 9, A, B, C, D, E, F

The advantage of hex is that modern computer code is based on 8 bit bytes. Therefore, the maximum value in a byte is 2^8 - 1, which is an awkward 255 in decimal. The value is awkward because you can't really string together the value of multiple bytes very well. However, if you use hexadecimal, then every four bits is one digit, such that the maximum value for a byte is FF. This means that you can show four byte integers as 8 digits. If you were to use decimal, the number of digits would be between four and twelve, and you would need something extra to separate them (hence the way IP addresses look, with a dot separator).

All memory addresses in 32 bit systems are four bytes, which means 8 hex digits. If you look at your example, you will see that all of those addresses are 8 digits long.

[baja_yu]

How about this, I found it by Googling "easyshare downloader"

http://www.megaleecher.net/taxonomy/term/6892

[minitech]

As you see I cant simply get the source & replace javascript. & I already tried this btw, it did not work. & I cant use greasemonkey cuz it wont let me modify javascript functions.

You know, that means you did it wrong.

[DeanMc]

You could also just pay for the account......

[Maven]

You could also just pay for the account......

There's that.

[mar_zim]

You could also just pay for the account......

Why pay if you can have it free.

[visualAd]

If you want to know how memory works, then learn C or even better and assembly language. Trying

to find out how to write to an arbitary location containing a countdown vlaue is a little pointless and won't be of any use in showning you how objects are stored in memory. Anyhow, the timeout value is most probably stored as a date / time in memory, not an integer.

[goldenix]

In any case I figured out how to make me scanner work. It can scan whole memory now. But its even slower than hell. If i use CE it takes around 1-2 seconds. with this 140+ HOURS. this is crazy lol.

Well im going to try to make it in C now. Maybe Ill find more guides for C.

If you want to try it out or just for fun, go ahead:

NomadMemory.au3

#cs ----------------------------------------------------------------------------
 AutoIt Version: 3.3.6.0
 Author:         goldenix

    Script Function:     Scan Memory
    Remarks:            Hit ALT+ ESC to abort scan, show array & exit

                        Total Memory in Bytes 3144108000
#ce ----------------------------------------------------------------------------
#include <NomadMemory.au3>
#include <Array.au3>

HotKeySet("!{esc}", "_exit")     ; Alt ESC to exit
;~ ------------------------------------------------------------

;## Create 2 Arrays
Dim $avArray_1[2][2] ;2 Rows & 2 columns at the beginning
;~ ------------------------------------------------------------
Global $iv_Pid          = ProcessExists ( "firefox.exe" )
Global $MemoryOpen    = _MemoryOpen($iv_Pid)

Global $mem         = MemGetStats()
Global $Bytes         = stringreplace($mem[1]*1000,'.','')

ConsoleWrite('Total Memory in Bytes: ' & $Bytes & @CRLF)

Global $xxx = 1
Global $i
;~ ------------------------------------------------------------


For $i = 1 to $Bytes ; until total memory is scanned probably....

$begin = TimerInit(); check how long will it take to scan memory
;~     ---------------------------------------------------------------------
    $Address = _DecimalToHex($i,8)

    $Value = _MemoryRead('0x' & $Address, $MemoryOpen)

    $filter = _Flter($Value) ; 1=put to array, 0 Skip $Mem_Read value

    If $filter = 1 Then __ArrayAdd($Address, $Value)
;~     ---------------------------------------------------------------------
$dif = TimerDiff($begin)
ConsoleWrite('Time to scan memory in Hours:' & $dif/1000*$Bytes/60/60 & @CRLF)
_exit()

Next
_ArrayDisplay($avArray_1, "$avArray")


;~ ==================================
;## First scan
;~ ==================================
Func __ArrayAdd($Address, $Value)

    $iRow = UBound($avArray_1)        ;Get array lenght
    $iCol = UBound($avArray_1, 2)    ;Need this line to redim the colums

    $avArray_1[$xxx][0] = $Address
    $avArray_1[$xxx][1] = $Value

;~     ConsoleWrite($Address & ' ' & $Value & @CRLF)
    ReDim $avArray_1[$iRow + 1][$iCol]    ; add more rows +1

    $xxx = $xxx +1
EndFunc


;~ ==================================
;## Filter out values we are looking for
;~ ==================================
Func _Flter($Value)
    If $Value > 1 And $Value < 300    Then
        Return 1
    Else
        Return 0
    EndIf
EndFunc


Func _exit()
    _MemoryClose($MemoryOpen)
     _ArrayDisplay($avArray_1, "$avArray")
    Exit
EndFunc


; #FUNCTION# ==============================================================
; Function Name..: _DecToHex ( expression [, length] )
; Description ...: Returns a string representation of an integer converted to hexadecimal.
; Parameters ....: expression   - The integer to be converted to hexadecimal.
;                               - [optional] Number of characters to be returned (no limit).
;                                 If no length specified, leading zeros will be stripped from result.
; Return values .: Success      - Returns a string of length characters representing a hexadecimal expression, zero-padded if necessary.
;                  Failure      - Returns "" (blank string) and sets @error to 1 if expression is not an integer.
; Author ........: jennico (jennicoattminusonlinedotde)
; Remarks .......: Output format "FFFF".
;               The function will also set @error to 1 if requested length is not sufficient - the returned string will be left truncated.
;               Be free to modify the function to be working with binary type input - I did not try it though.
;               current AutoIt Hex() limitation: 0xFFFFFFFF (4294967295).
; Related .......: Hex(), Dec(), _HexToDec()
; =======================================================================
Func _DecimalToHex($hx_dec, $hx_length = 21)

    Local $HX_REF="0123456789ABCDEF"

    If IsInt($hx_dec) = 0 Then
        SetError(1)
        MsgBox(0,"Error","Wrong input, try again ...")
        Return ""
    EndIf
    Local $ret = "", $Ii, $hx_tmp, $hx_max
    If $hx_dec < 4294967296 Then
        If $hx_length < 9 Then Return Hex($hx_dec, $hx_length)
        If $hx_length = 21 Then
            $ret = Hex($hx_dec)
            While StringLeft($ret, 1) = "0"
                $ret = StringMid($ret, 2)
            WEnd
            Return $ret
        EndIf
    EndIf
    For $Ii = $hx_length - 1 To 0 Step -1
        $hx_max = 16 ^ $Ii - 1
        If $ret = "" And $hx_length = 21 And $hx_max > $hx_dec Then ContinueLoop
        $hx_tmp = Int($hx_dec/($hx_max+1))
        If $ret = "" And $hx_length = 21 And $Ii > 0 And $hx_tmp = 0 Then ContinueLoop
        $ret &= StringMid($HX_REF, $hx_tmp+1, 1)
        $hx_dec -= $hx_tmp * ($hx_max + 1)
    Next
    $ret=String($ret)
    If $hx_length < 21 And StringLen($ret) < $hx_length Then SetError(1)
    Return $ret
EndFunc  ;==>_DecToHex() 

[EntityX]

How does memory work? It works very well.