Концептуальный похоже пакер
ANDpakk2 (apk2) v0.18 - Build Mon Jul 16 00:52:28 2007
.state of the art EXEcutable compression tool

.copyright (c) 2006,2007 Dmitry "AND" Andreev
.http://and.intercon.ru

----introduction--------------------------------------------

ANDpakk2 is an EXEcutable compression tool allowing
you to get better compression ratios of your intros,
demos or any other kind of software.
This project is a part of research work of the author
for internal usage and 64k intro experiments.

ANDpakk2 is based on idea of adaptive statistical data
compression based on context modeling and prediction by
model mixing and prediction by partial matching on
neural networks.
All the data is getting processed by filters,
predicted in different context models (by neural
networks) which are getting mixed and predicted by
another neural networks again. Prediction is done
per bit with four-byte context history and coded by
arithmetic coder at the final stage.

I've got very impressive compression ratios making
Zoom3 64k intro compressed down to 45760 bytes after
some specific optimizations of the data structures.
It also shows much much better compression ratios than
any other general purpose EXE/data compressor.

----usage---------------------------------------------------

Just pass your file as the first parameter like this
apk2.exe yourfilename.exe

And two files (yourfilename_apk2.exe and
yourfilename.exe.apk) will be generated. Where file with
.apk extension is just a pure compressed data to have an
idea about compression ratio. So you can remove it.

Also during compression you will get information about
compression ratio of each 1024-byte block.

----limitations---------------------------------------------

This is SPECIALIZED compressor and it was designed to
get as higher compression ratio as possible for
64k intros or files bigger than 32k and less than 256k.
As long as compressor/decompressor are not using any
kind of dictionaries, minimal file size should be
at least 8k or something like that. So neural networks
will be trained enough to build and predict any kind
of data model.
As long as decompressor has linear performance the
bigger file you have the longer it will take to
decompress it.
Only code, data and resource sections of EXE/PE file
are supported and tested mostly on internal test suit.
So if your compressed EXE doesn't work then something is
wrong with your original EXE file and I didn't test/had
the same case. Sorry for that.
To get better compression ratios your data should be
optimized for PPM (Prediction by Partial Match) kind of
algorithm in general. For instance, in intro directory
you will find zoom3 v1.03 which was optimized for apk2
and it is 6k smaller than not optimized version.
DO NOT DELTA COMPRESS your data, DO NOT SEPARATE data
into different streams and DO NOT DO the same as you did
to get better compression ratio for UPX or any other
kind of compressor which is not based on PPM or PPM
related compression algorithm.
v0.06 supports only 16mb of BSS, so allocate your
memory dynamically.
Decompressor by itself takes 3-4k of code, so do not
expect to pack 4k intros or something very small.
Only 0 (Zero) gaps are handled quickly. So if you have
very long sequence of non-zero bytes it will not be
effectively compressed and will take quite some time.

----what's new----------------------------------------------

v0.18

- Increased compression ratios
There is two main features that increase compression
ratios. Optimized context models and x86 code reslicing.
Whereas first feature increases overall compression,
second one gives much better ratios on x86 code.
Basically, it disassembles the code and puts different
opcode components into separate streams of data. After
decompression a little piece of code assembles all
together.

- Increased compression speed
Due to special kind of optimizations on context models
some of them were merged. But that's not all. There is
a new option called "fast zero-gaps" compression.
By enabling this option model analyzer will be disabled
in case of very long empty blocks.

- Improved compatibility
The way PE file created is quite different now. There
is no more input file size restrictions. Decompressor
has been rewritten in address independent way such that
it can be placed at any place in memory. DLL importer
is also quite different now. After all it even works
under Wine in Linux and on Windows Vista 64.

- Configurable stub
Now you can disable progress window (if you are ok
with decompression speed of your app) or enable some
extra compression options. In every case there are
pre-compiled stub wich is as small as possible for each
case.

| v0.06 | v0.18
---------------------+---------+---------
squish_apk2.exe | 52496 | 50576
zoom3_v1_03_apk2.exe | 48000 | 45760

----package-------------------------------------------------

.this package includes:

apk2.exe - packer by itself
file_id.diz - short package description
readme.txt - this file
intros/squish_apk2.exe - Squish 64k intro
intros/zoom3_v1_03_apk2.exe - Optimized Zoom3 64k intro

.ATTENTION

ANDpakk2 IS DISTRIBUTED "AS IS". NO WARRANTY OF ANY KIND
IS EXPRESSED OR IMPLIED. YOU USE AT YOUR OWN RISK.
THE AUTHOR WILL NOT BE LIABLE FOR DATA LOSS, DAMAGES,
LOSS OF PROFITS OR ANY OTHER KIND OF LOSS WHILE USING OR
MISUSING THIS SOFTWARE.

This program may be used FREEly, and you are welcome
to redistribute it under certain conditions.

STRICTLY FORBIDDEN to modify or redistribute MODIFIED
version of this package.

STRICTLY FORBIDDEN to redistribute any file of this
package separately.

STRICTLY FORBIDDEN to modify any file generated by
apk2.exe tool, modify EXE/PE binary header
of generated/compressed file(s).
and.intercon.ru/downloads/apk2_v0_18.zip
В арихеве распакованый семпл был с макером и скрипт для оеп

c0a2_08.08.2007_CRACKLAB.rU.tgz - zoom3_.rar

| Сообщение посчитали полезным:

pavka пишет:
Концептуальный похоже пакер
PPM давно не новость. Необычно, что он используется для упаковки именно относительно небольших по размеру файлов - 'статистика' слишком мала для эффективного предсказания 'длинных' последовательностей - какой бы метод 'обучения' не использовался.

| Сообщение посчитали полезным:

pavka, i like all new stuff you post
Thanks

| Сообщение посчитали полезным:

Он всё-таки больше на демки/интро расчитан. Интры мелкие, вот он под них и затачивался.

STRICTLY FORBIDDEN to modify any file generated by
apk2.exe tool, modify EXE/PE binary header
of generated/compressed file(s).

Интересное требование у разрабочика. Вроде бы пакуешь свои файлы, следовательно твоя собственность А что это получается чужой программой обработал, и уже не можешь модифицировать хидер, а ведь помогло бы в будущем, вдруг автораспаковщики появились бы, ибо ручной метод уже в инете валяется. От простых автораспаковщиков модифицировать можно было бы.

| Сообщение посчитали полезным:

Жмет покруче WinUpack и аверы его еще не знают.

-----
Nulla aetas ad discendum sera

| Сообщение посчитали полезным:

ANDpakk2 0.18 (Unpacking)

--> Download <-- http://www.tuts4you.com/request.php?1895

| Сообщение посчитали полезным:

p0n4ik пишет:
ибо ручной метод уже в инете валяется

centner пишет:
ANDpakk2 0.18 (Unpacking)

--> Download <--

Угу, именно эта фигня

| Сообщение посчитали полезным:

И всё-таки приложения им обрабатывать - мясо. Ладно ещё интры, там привычно видеть прогресс-бары декомпрессинга А вот для приложений время декомпрессинга высокое, если и убрать окошко опцией -p0, дабы не портить внешний вид, всё равно ведь долго ждать загрузки.

| Сообщение посчитали полезным:

К сожалению далеко не всегда жмёт лучше Upack'a, да и слишком часто экзешники после упаковки не работают. На данный момент "upx --ultra-brute" и Upack - лучшие.

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