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29 October, 2008

The Zip oF DeATh

this is a exploit of the compression algorithms to make a small zip that will extract into extream amounts

their are more ways and better ones than this one but i will only show how to make a simple 1k = 1m ratio





make a.txt file

open and type the null character (alt + 255)

press ctrl + a then ctrl + v a couple times to make some null bytes

if u have a hexeditor make the hex 00 for about 50 kilobytes

now make several copies of a.txt and name accordinly

open cmd.exe

type copy /b *.txt b.txt

now every copy is made into a super copy and repeat

once u have a nice empty big text file like 1gb

put it in a zip archive

because of the simple construction of the file

1gb of null bytes

the zip is only 1 mb in size and can really annoy freinds

for added fun hex edit the zip and u will see a bunch of hex 5555

just add some more and the file will expand amazingly

make sure to not open this after




You can always create your zip of death from the command line in linux

dd if=/dev/zero bs=1000 count=1000000 | gzip > test.gz



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