Reverse engineer an algorithm

$30-250 USD

Completed

Posted

about 10 years ago

$30-250 USD

Paid on delivery

I will send you a program, and tell you what to search for. I want you to tell me how this program generates a certain checksum, so that I can also generate valid checksums myself. The relevant code in the program is very short so I'm assuming it's a very simple algorithm (I'm just not very fluent with understanding ASM). The program is not protected in any way. If you can read a short segment of ASM/understand the pseudocode that Hopper gives, this should be a pretty quick job. As long as your description of this checksum lets me generate valid checksums, that's all that I need.

Assembly

Software Architecture

Project ID: 5825750

About the project

9 proposals

Remote project

Active 10 yrs ago

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Awarded to:

@RolandasLanteka

So, we have a working solution. It will be the C# source code (function) to use in your code as you wish.

$250 USD in 1 day

5.0

(5 reviews)

3.6

9 freelancers are bidding on average $280 USD for this job

@vietitdotinfo

Hi. I have exp in reverse engineering and algorithm. I can read asm and create a generator for you. Please send program to check. Thanks!

$200 USD in 1 day

4.5

(58 reviews)

6.3

@SUog

Hello, I'm interested in your project. Please send me the file you want to disassemble. Regards, Serge

$222 USD in 5 days

5.0

(148 reviews)

6.0

@dragomirvw

Hello, Please, send me the target executable. I will check it and let you know. Kind regards, Dragomir

$30 USD in 5 days

4.9

(134 reviews)

5.6

@GreenPanda

Hi, I have an experience in reverse code engineering. I do malware research, vulnerability research and reversing for the purpose of decompilation. If you hired me, I want first to know the purpose of the project to make sure that I am not supporting any illegal actions. Thank you.

$222 USD in 2 days

5.0

(6 reviews)

4.5

@BestDev007

Hi, I have to see in the file. After that I can modify my bid to real price. If the job is simple as you said I can bid the lowest price.

$1,111 USD in 100 days

5.0

(5 reviews)

3.7

@DeadC0der

Hi there I'm delphi coder and as you know each coder should know at least Assembly language so he will figure out what is going around him ^^ I used to debug my own applications using professional debuggers,reconstructors and so forth , to get pieces of the code also to check for bugs anyway just provide me with exe u want to debug and I'll do my best after all it s your verdict ^^ Best Regards

$155 USD in 5 days

5.0

(8 reviews)

3.9

@OpenPhantom

Hi I am an electronics engineer from pune ,India. Have assembler and c / c++ coding experience on linux and windows platforms. Am more versed with the linux env. and can use the GCC toolchain for reversing. Thanks.

$222 USD in 3 days

0.0

(0 reviews)

0.0

@DemonHunt

I have 5 year exp in Reverse tool, Virus.... i will send to you source in C of your program if it short. if not you will get C source of checksum algorithm.

$112 USD in 1 day