Section-0.A: Requirements
This is going to be a brief
tutorial over hacking In-game
values of Java Games. I
personally follow this method
to hack my favourite java
games and my success rate is
90%.
Noob abbreviations: RSK-
Right Soft Key, LSK- Left Soft
Key.
Requirements:
1. Java enabled mobile device
(s40/s60/Generic).
2. JBE or Java Byte-Code
Editor v1.40 App (Bugless; Link
Below).
3. Blue FTP/ MiniCommander/
File Explorer App (Search On
Internet).
4. Common-sense*.
5. Patience*.
6. Basic knowledge of mobile
apps & files (Renaming,
Extracting, Repacking,
Copying, Pasting .jar .jad .zip
files & granting permissions
to apps).
Note: You can do this over
computer or smartphone but I
am limiting this tutorial within
java phones. If you find any
error like Out Of Memory/
Not Enough Memory/ Can't
Run On This Device then it
means your device lacks
enough RAM and necessary
JSR Libs to run the required
apps.
***Don't Quote any of the
posts. If u don't understand
anything post quick reply or
PM me***
Section-0.B: File Types
To be a successful hacker you
will need some knowledge
about java games, game file
contents and game vendors.
Java games are supplied in a
.jar archive which is actually
a .zip archive format. This
archive contains the compiled
binary files and game
resources. In a .jar Java
game, you will see a META-
INF folder containing a
MANIFEST.MF descriptor file.
It's simply a text file renamed
as .MF rather than .txt and
uses UTF-8 encoding. You can
edit this file using any Text
Editors or File Manager App to
change the game name,
description, vendor name etc.
In .jar you will see some files
with .class extension. These
are the compiled CLASS files
which contain the binary
codes to run a java game. To
hack In-game values & strings
we usually modify these
CLASS files.
There are some other files in
the .jar archive named as:
a.png, b.mid, c.lang, d.gif,
e.bmp, f.dat, g.db, h.bin etc.
PNG files are image files, MID
files are audio files, LANG/LNG
files are compiled language
files which contain the
language strings, GIF files are
graphics files ect. (to learn
more search on internet).
Vendors like Baltoro Games,
Fishlabs etc. keep these files
with extensions. But Gameloft
removes extension from all
other files except CLASS files
to shrink the size of the
entire game archive. This
sometimes becomes tricky to
identify the audio/ image/
language files of GameLoft
games. To identify these files
we use HEX Editors or similar
apps along with the
knowledge of file signatures
or mime types.
Section-1: Strategy Games/
Single Level Games
1. Using File Explorer, navigate
to your game.jar file. Select
it. Extract it in a Folder. Go into
the folder and recheck if all
files are properly extracted.
Close the app.
2. Open JBE v1.4 app. Navigate
to the same above Folder. You
will see CLASS files like:
a.class, b.class, c.class etc. Now
you have to learn some
commands. (A)Search-
Commands: iconst for value
0-5, bipush for value
6-127, sipush for value
greater than 127. (B)Replace-
Command: ldc-w for the hack
value.
3. Open a CLASS file and you
will get 4 options: 'Constant
pool', 'Field', 'Methods',
'Search'. We need to work with
only 4th option 'Search'. Select
'Search' and type the above
search-commands according to
your desired values (Example:
sipushspace2500 for
searching value 2500). If app
finds similar values according
to your command then it will
show the 'methods'.
Otherwise the value that you
are looking for is not in the
current CLASS file. In this case
search in another CLASS file. If
app finds and shows one or
more methods like: a, b, c, A, B,
C, ae, ax, az, init, clinit etc
open each of them one by
one.
4. For practical knowledge, I'll
be hacking Kingdoms &
Lords by GameLoft
(download from dedomil). Play
the game for a bit and you will
see the game starts with
1500 coins, 3 diamonds, 25
woods, 25 metals, 25 cloths,
200 population limitation, 10
energy points and 0 friendly
stars. Exit the game. Follow
step 1 & 2. Then come back to
step 5.
5. Any of these CLASS files
may contain the above In-
game values. Open each of
them Select 'Search' option
Type sipush 1500 (targeting
the coin's value) Ok. You will
find only searching in the
j.class file shows a valid
result which is clinit
method. Open it. There are
many lines containing codes,
some similar to our search-
commands and some
unknown. DON'T PRESS ANY
WRONG KEY NOW OR THE GAME
WILL CRASH. Press RSK titled
'Fast' Select 'Edit' Select
'Search' Type sipush 1500
Ok.
6. The app will take you to
the line containing value 1500
(line 2571). Now, how can you
be sure that it is the exact
value that you are looking
for? Look at the codes
carefully. The codes present a
list of In-game values. The
codes:
iconst_0
sipush 1500
iastore
dup
iconst_1
iconst_3
iastore
dup
iconst_2
bipush 10
iastore
dup
iconst_3
iconst_0
iastore
dup
iconst_4
sipush 200
iastore
dup
iconst_5
bipush 25
iastore
dup
bipush 6
bipush 25
iastore
dup
bipush 7
bipush 25
iastore
dup
bipush 8
iconst_1
iastore
dup
bipush 9
iconst_0
iastore
dup
bipush 10
iconst_0
iastore
putstatic j/x[I
....and a new syntax pattern
will start. It indicates our last
range for searching our
desired values. So, we won't
look any further below. I'm
typing them in an arranged
format for better
understanding:
iconst_0, sipush 1500, iastore,
dup
iconst_1, iconst_3, iastore, dup
iconst_2, bipush 10, iastore,
dup
iconst_3, iconst_0, iastore, dup
iconst_4, sipush 200, iastore,
dup
iconst_5, bipush 25, iastore,
dup
bipush 6, bipush 25, iastore,
dup
bipush 7, bipush 25, iastore,
dup
bipush 8, iconst_1, iastore, dup
bipush 9, iconst_0, iastore, dup
bipush 10,iconst_0, iastore,
...Look at the above codes
again. Can you imagine a
sequence like below?
0. 1500
1. 3
2. 10
3. 0
4. 200
5. 25
6. 25
7. 25
8. 1
9. 0
10. 0
....Excited Huh?! Yeah, now we
are Damn sure this is the
CLASS file which stores the In-
game values and these are
the values that we are
looking for; where 1500 is
coins, 3 is diamonds, 10 is
energy points, 200 is
population limitation, 25 is
woods metals cloths and any
of the 0 can be friendly stars.
7. Now select each line and
click RSK titled 'Fast' Select
'Edit' Select 'Edit the line'
Type ldc_w 999999 [Note:
there are two spaces at the
beginning of each line. Don't
mess them while editing. Just
erase each letter from end
one by one and type replace-
command with hack value]
LSK titled 'Menu' Ok. Change
all values similarly. After
finished your codes will look
like this:
iconst_0
ldc_w 999999
iastore
dup
iconst_1
ldc_w 999999
iastore
dup
iconst_2
ldc_w 999999
iastore
dup
iconst_3
iconst_0
iastore
dup
iconst_4
ldc_w 999999
iastore
dup
iconst_5
ldc_w 999999
iastore
dup
bipush 6
ldc_w 999999
iastore
dup
bipush 7
ldc_w 999999
iastore
dup
bipush 8
iconst_1
iastore
dup
bipush 9
ldc_w 999999
iastore
dup
bipush 10
iconst_0
...Now click RSK titled 'Fast'
Select 'Save' Select 'Menu'
Select 'Save' 'Dismiss'.
You are done! You
successfully hacked the game!
Now repack all the files of the
Folder in a JAR archive using a
File Explorer app. Install the
game and Whalla! You got a
hack game of your own.
I have hacked Kingdoms &
Lords, Total Conquest, Ice
Age Village, Little Big City 1
& 2, Green Farm 1 & 2. All
were successful.
Note: After hacking and
running game if you get error
MIDlet is Corrupted it means
you have messed up the
CLASS file while hacking. Or, if
you see no change in the
hacked game then it means
you have not changed the
exact value of the game. Try
Again From Beginning with
more Focus.
Tips: For some games it will be
tricky to identify the exact
value. If you are not sure
which value may be the one
that you are looking for, you
should edit every possible
value one by one and save
the CLASS file for each
changes you make. Then
repack and run the game for
every single change and
notice the In-game changes.
At last..hacking is not that
easy readers. Cheers!!!
Next post is going to be on
Hacking Multi level Games. Till
then, Good Luck.
Download JBE In my channels to hack the game