**Rhiza - founded on the human being**

The city state of Rhiza is all that is left after a long period of wars and natural disasters. Located in a paradisiac island once known as Fernando de Noronha, the city is organized around the concept of social welfare and uses all of its resources to build a better world. Using their advanced technological knowledge, they work towards a world respectful of all beings and natural resources. Technology and nature complement each other in a perfect world.

Each citizen can choose their profession based on their own abilities. However, one profession is special and its professionals are selected while they are very young through a rigorous process: Artificial Intelligence maintainers. AI is a fundamental piece in this society, taking care of all labor-intensive activities. This means humans only have to work on activities that contribute to society's cultural and intellectual development. Those working on AI receive special training to maintain and create AIs. However, all of them are government officials exclusively and live in a segregated area (this is considered a great privilege). The government has been in full control of AI since Rhiza was founded. According to the historical register, humanity’s collapse was caused by the unchecked development of AI and its use in wars, as well as the mass unemployment caused by the replacement of humans in almost all activities. It’s for these reasons that the activity is so heavily regulated.

The alarm rings. Laura Decker is ready for one more day of studies. She is an applied, hard-working freshman and a proud citizen of Rhiza. Despite her love for her community, she frequently looks at the horizon and thinks about exploring the unknown. Leaving the island is forbidden, supposedly to maintain everyone safe.

Laura is part of Rhiza’s elite. She’s always had access to anything she wanted, and yet she has a little secret: hacking into security systems is her hobby---a very unusual activity in a society that does not think they need security systems at all. She hacked many such systems, but never a government one as it is considered a severe crime. Nevertheless, Laura’s actions are motivated by the search for her elder brother Alan, who was recruited to work on AI when he was still a child.

**Laura uncovers the truth**

Laura finally got the courage to hack into the government’s system. It took a lot of preparation to ensure she would not be tracked and now was the time to find her way to her brother, but what she was about to see would completely change her life and what she believes to be her reality. After getting access to the servers, she believes she will need a long time to find anything of interest, but one machine labeled “monitoring” caught her attention. Thinking it would be a random security camera in the city, Laura accessed the first feed on the list and was immediately flabbergasted. She sees hundreds of people doing manual labor non stop. They wear a gray uniform and are not in good shape. Laura cannot comprehend. To top it off, this was a live feed, not some recording from a long time ago.

Laura now doubts the government is as open as it says to be. She needs to discover who those people are, where that place is and what they are doing. Also, she could not find any trace of the AIs the government claims to use to bring external resources into the island.

After a long study of the government’s secret files, Laura begins to see the truth. There really was a world-wide conflict at the time the city was founded, but it was not driven by the abuse of AI nor a conflict between those in-favor and against AIs. Among superpopulation, climate change and other global challenges, humanity had great hopes that an “advanced AI” would be built and solve all of its problems. The research did not progress as fast as people hoped for, leading to the collapse of the world’s economy and wars. Even today there’s no such a thing as an “advanced AI” as it is told in Rhiza. The manual labor is actually performed by human slaves from poor areas.

To keep a group of people capable of controlling the slave colonies, Rhiza’s government traces the psychological profile of all citizens in their infancy, looking for those that lack empathy. These children are removed from their families and subjected to a rigorous trainament to join the top ranks of the government, under the pretext of being selected to work with the non-existent AIs. For Laura’s dismay, that’s exactly what happened to her brother Alan after he was diagnosed as a psychopath.

Rhiza’s founders were rich eugenists, who managed to keep their belongings through the global crisis. The original inhabitants of the island were chosen among their own families and some others who they considered to belong to a “clean race”. The original goal of this society was indeed to keep researching AI and get to the elusive “advanced AI”. This AI would remove the need for human slaves and would allow them to decimate the poor. Eventually, geneticists realized that the genetic pool of the island would make it impossible to sustain the birth of healthy humans in the long run. Many people on the island are already infertile. In vitro fertilization is available, and sometimes the genetic material comes from the poor zones, where eggs and sperm are forcefully collected, enriching ever so slightly the genetic pool of the island.

**Resistance?**

Laura feels desolated after learning the truth, but she suddenly remembered a curious episode from her childhood. She was playing in the garden next to her home with her brother before he was taken. They found a capsule buried on the ground, but their father, Augusto, quickly intervened and took it away. What could be inside of it?

She searches her basement for it and finds the capsule in a safe she easily cracked open. It was a time capsule, containing reports from three companies worried about the imminent war: Telefónica, BugHunt e PRIDE. The capsule also contains an optical media and instructions on how to read it.

Laura finds an immense library in the media describing in detail the technologies of the year 2020, and instructions on how to access a submarine fiber optic network that connects the island to the mainland. Why did her father hide the capsule? Did he know what was inside? If he did, why didn’t he destroy it, or give it to the government? Would her family be part of a secret movement against the government? Was her brother really a psychopath, or was that retribution?

Laura has many doubts still, but she now has a lot more motives to hack. CTF-BR{join_Lauras_fight_against_opression_and_discover_the_truth!}

Laura found some plaintext/ciphertext pairs. It looks like the AI have modified an old crypto cipher to make it run faster, but used the old one to leave a last warning. Is it possible to recover this warning?

[Files](https://static.pwn2win.party/a2s_696ce43f930ebc1f53f413a7ef972d34155748dacc7a8ca8cdeeab7a50b7f12d.tar.gz)

[Mirror](https://drive.google.com/file/d/1xGy6Z8PZDXr67zzxknqXESVlncPlC9UY/view?usp=drivesdk)


Laura is trying to access the monitoring machine. Will she be able to do what
is needed to see the truth?

[Files](https://static.pwn2win.party/accessing_the_truth_95ea5474ef43eafd13968014187130b4268cc3ab7249f605868a47f0e35569fe.tar.gz)

[Mirror](https://drive.google.com/file/d/1hfKfJve3xv_cb_JfYKcyjm5Z1p_eLCuu/view?usp=drivesdk)


**Server:** nc accessing-the-truth.pwn2win.party 1337


It looks like the leaders of the city-state of Rhiza are using an odd password manager. Laura got access to the machine but hasn't been able to extract the password yet. After running *cpuid*, maybe you're able to *speculate* what the secret is. Obs: There is no need to escalate your privilege. The binary *server* should be running on the machine (check it with ps).

[Files](https://static.pwn2win.party/baby_write_only_password_manag_4a73943583f6b2c8994d8252421c322115705f056e0b69ee61d7dd784102cb5b.tar.gz)

[Mirror](https://drive.google.com/file/d/1FIQjJ3f_DWJCahsDxe5T_Bwp-E9ATy1B/view?usp=drivesdk)


**Server:** nc baby-writeonly-password-manager.pwn2win.party 1337

**Server Backup:** nc baby-writeonly-password-manager-2.pwn2win.party 1337


rafael\_p (aka rafaeleeto) works as Principal Hacker Engineer in a topsecret hacking division of the Government of Rhiza, called HARPA (Highly Advanced Research Projects Agency). Laura got access to a Botnet Project he is working on, called "Butcher Network". It is a "Bot Manager", a new concept in the context of Botnets, where a central bot controls all the others. It has **several protection mechanisms**, to prevent unauthorized access, including a very interesting **dropper**. We were able to get a dump of the machine that rafael\_p uses for his tests. Your **goal** is to be able to extract the bot to try to understand its operation, connect to the network and bypass all its protections to pwn the instance of this bot that is running, to got access to its channel on C2. With that, we will get to know all the other administrators who are also involved in this project. This information will be very useful in the future.

**Flag format:** CTF-BR{admin1,admin2,admin3...} (nicknames in ascending alphabetical order)

[Files](https://static.pwn2win.party/botnet_the_final_bypass_268005c61c39795fcf448483929c5d3cb7aac479694d8d1e21b2df84c42787a1.tar.gz)

[Mirror](https://drive.google.com/file/d/1yH50ZA3Rh3QKDgbzOeo9BuBBGCkHXdzm/view?usp=drivesdk)


Government of Rhiza has been creating some tools to make the slave labor more efficient. Laura scanned all IPs addresses from Rhiza's ASN and found one of these tools. Your goal is to get into the server to be able to collect the IP addresses that connects to it. Once collected, we can find out the approximate location of these machines.

[Files](https://static.pwn2win.party/c_mon_see_my_vulns_70097e678d572b03e8098868191037f5c3518ca4a8d0512573845db8a293a153.tar.gz)

[Mirror](https://drive.google.com/file/d/12AJkithr9pB5Z_W83hQ34IXjRnFmkqpY/view?usp=drivesdk)


**Server:** [http://cmon-see-my-vulns.pwn2win.party:1337](http://cmon-see-my-vulns.pwn2win.party:1337)


The AI created a new hash function to be used in one of their authentication systems. This hash function looks somewhat familiar, but is it possible to forge a valid credential?

[Files](https://static.pwn2win.party/cladorhizidae_50bb826634ab0a20be92c226ae21f530b59818923e3920b5aa4b1a17cae0d69e.tar.gz)

[Mirror](https://drive.google.com/file/d/1XbLme-clChCZhVdoRzDTpB-z3w9Hnz9M/view?usp=drivesdk)


**Server:** nc cladorhizidae.pwn2win.party 1337


**Server:** [https://dots.exposed](https://dots.exposed)

**Author:** geolado


Roaming through the dark alleys of Rhiza's systems Laura found something that resembled to a "Serverless Cloud Computing" system, that she have read about on the files contained inside the capsule.
In a moment of excitement she wonders what secrets could be hidden between its lines.

**Authors**: [feroso](https://github.com/feroso)

[Files](https://static.pwn2win.party/enlighten_me_pt_1_f5a21b07de23d592b1dc9075a403fabc44227b502780c96e5612d3ae425be29c.tar.gz)

[Mirror](https://drive.google.com/file/d/1AGck7VoMzPs2a0V_QwD2MqaW-jSGcH7M/view?usp=drivesdk)


**Server:** nc enlightenme.pwn2win.party 1337


A ray of light seems to lead Laura on the way to find secrets that she could not turn a blind eye.
Will she be able to find enlightenment in such a hard path?

**Authors**: [feroso](https://github.com/feroso)

**Server:** nc enlightenme.pwn2win.party 1337


Last year, while an oblivious supervisor responsible for Rhiza's communication systems drank a Hacker-Pschorr Weissbier, an operation was launched by several insurgent groups to both find vulnerabilities in their systems and intercept Rhiza's communications. Although the operation was very successful, months later all the vulnerabilities were fixed.

We now need you to find a way to hack into their systems again and leak their secret communications.

**Server:** [https://hackus.xyz](https://hackus.xyz)

**The flag is located at:** [https://hackus.xyz/s/secret-note](https://hackus.xyz/s/secret-note)

**You can report URLs at:** [https://report.hackus.xyz/](https://report.hackus.xyz/)

You can test locally by deploying the following docker-compose file (only the CodiMD instance with the respective configurations used in the challenge are available):

[Files](https://static.pwn2win.party/hackus_5903fca1f610c5f3a6740729e17f82040d184f869b4b93cd5529c48b04decdb7.tar.gz)

[Mirror](https://drive.google.com/file/d/1B1IvtZvn2KbyI7R93GQdwl6C6_uAN3ei/view?usp=drivesdk)




Laura is very curious and ended up discovering that the leaders of the city-state of Rhiza share a secret. This secret is only revealed when they are all gathered. Due to the carelessness of one of them, Laura was able to intercept the message with the program to be used at the time of the disclosure and extract it. But, despite all her efforts, Laura was unable to reveal the shared secret. Therefore, she needs help to understand how the program works and finally find out what this secret is!

**NOTE:** The binary was built using the arm toolchain from the Ubuntu 16.04 official repos.

**NOTE:** Not all hosts it tries to connect to should be online. Please try all possible hierarchies.

Authors: [thotypous](https://github.com/thotypous), [n0ps13d](https://github.com/saullocarvalho)

[Files](https://static.pwn2win.party/highest_power_2eb2514185a9e040b2a3004f0edfa8550aaf2fe3de0976cd4600f79ba7499d50.tar.gz)

[Mirror](https://drive.google.com/file/d/1DV71Uru9qy4bG1SgI7Aa3OTsP8wR8-jK/view?usp=drivesdk)


Laura just found a website used for monitoring security mechanisms on Rhiza's state and is planning to hack into it to forge the status of these security services. After that she will desactivate these security resources without alerting government agents. Your goal is to get into the server to change the monitoring service behavior.

[Files](https://static.pwn2win.party/illusion_06437ee23c69c151e8e416c02b82d5b20e145c150c0109960b3b85f8c0f8a210.tar.gz)

[Mirror](https://drive.google.com/file/d/1ufAatmkZsN8aSt-l--CHvZLGTiKbSEKu/view?usp=drivesdk)


**Server:** nc illusion.pwn2win.party 1337


Right after hacking into government, while she was searching for her brother's information, Laura faced a new cryptography scheme called Kangurei which seems pretty odd. Please, help her to break this scheme in order to gather more information.

[Files](https://static.pwn2win.party/kangurei_518e213acfecfc9bf8ee04e89af27b9db4c831e1be9f7877cee42bad4b2bb357.tar.gz)


While Laura was looking for her brother, she found a program that seems to scramble a password and save the result. Could you help her find the original password so that she can find and save her brother before it's too late?

**Author**: [andre\_smaira](https://github.com/afsmaira)

[Files](https://static.pwn2win.party/lost_exponent_2184dc532e4aec92252b9ae6a53058930e750abcbe6b33b70a9ac2fafae6449d.tar.gz)

[Mirror](https://drive.google.com/file/d/1JUmZxfB5InabwfWTkRpBUyhxsFUH1JCi/view?usp=drivesdk)


Laura suspects that information regarding her brother's whereabouts can be found on the MessageKeeper™ application, which is currently being used by Rhiza's elite to store sensitive intel that could jeopardize their national security.

Can you help her hack into their service and extract the message?

**Server:** [https://messagekeeper.xyz/](https://messagekeeper.xyz/)


Anna Julia is a childhood friend of Laura. In hiding, they spent years studying
hacking and technology together. In order to communicate in secret, Julia developed a
programming language and invented an encryption scheme. Now Laura needs to know
if this scheme really protects them from government spies.

[Files](https://static.pwn2win.party/oh_anna_julia_7450e56b01c39d3359bef3c2de4b942db078a1e79eebe275fa2bd1af3d5fc8c3.tar.gz)

[Mirror](https://drive.google.com/file/d/19BNNFmUly6z3gnAufQU2UMCX-x8g64Z1/view?usp=drivesdk)


**Server:** nc oh-anna-julia.pwn2win.party 1337


We found this Rhiza's Government Server, and we need to access it! It runs an Apple II emulator and accepts codes in Applesoft BASIC. If the result of your code generates a valid QR Code standard (not micro QR), it will be read and the content will be executed as a shell command on the Linux system. A very interesting way to interact with a server, don't you think?

Follow the directives below:

* Maximum size of the payload: 268 chars (it will be truncated at this point)
* Send the entire payload in one line (only printable chars), replacing line-break with the symbol § (only 1 allowed)
* Only QR Codes are accepted (**not micro QR**)
* Your code can take up to 50 seconds to be drawn, before the QR Code verification occurs
* If you have any questions, take a look at the source code of the server inside the container

We are releasing two options for you to run the environment and **do your tests locally**.

**Docker:**
    
    $ docker-compose up
    $ nc localhost 1337

[Docker Files](https://static.pwn2win.party/oldschool_adventures_appleii_0cd428eea828e4712ef92a1075a2c6718b6032f75bb0ce0fcaa514049fcb1b57_docker.tar.gz)

[Docker Mirror](https://drive.google.com/file/d/1iKnsbnNPkrgWl9MikjqJ-IgHK6-Tgoz0/view?usp=sharing)
   
**LXC Container:**

    $ lxd init and some <Enters> (if you've never used it before)
    $ lxc image import <name>.tar.gz --alias oldschool
    $ lxc launch oldschool oldschool
    $ lxc list (to get the IP)
    $ nc IP 1337
    
[LXC Files](https://static.pwn2win.party/oldschool_adventures_appleii_079445b87c7d73778b8c149d5ecf16aea09b3cd0282ce0dbc91ab3dd1891771a_lxc.tar.gz)

[LXC Mirror](https://drive.google.com/file/d/1kIRwf_H6d9eKZ7pwvVjl5ThK9mt4xUYG/view?usp=drivesdk)

**Server:** nc oldschool.pwn2win.party 1337



While searching for more information hidden by the government, Laura intercepted communication between a member of the Development team and a member of the Operation team. In summary, meeting the demand of the Security team, a Web application was developed to provide a program used for the analysis of PE binaries. Laura found the files used on that Web application and was able to reproduce its environment using VMware as virtualizer. She suspects that the program may be vulnerable, but she doesn't master binary exploitation. Therefore, she needs your help exploiting it.

Credentials:

* Administrator:Pwn2Win
* Player:Pwn2Win

Log in as Player in order to start the vulnerable service.

* **Server:** [http://pe-analysis-1.pwn2win.party:1337](http://pe-analysis-1.pwn2win.party:1337)
* **Server Backup:** [http://pe-analysis-2.pwn2win.party:1337](http://pe-analysis-2.pwn2win.party:1337)

**Author:** [n0ps13d](https://github.com/saullocarvalho)

[Files](https://static.pwn2win.party/pe_analysis_0dc26833115790aa8136b398c989b30ab7c4f9de688d17a0171ecb0321df86cd.tar.gz)

[Mirror](https://drive.google.com/file/d/1Y6ki3IhxOYet-jvzi4VaCFKRpPnhn-z6/view?usp=drivesdk)




Please, help me! The bad guys are using this server to send secret evil files.
Could you intercept one of these files to me?

Ps: The servers are rebooted every N minutes
Ps2: The bad guys send the file every 15 seconds.

[Files](https://static.pwn2win.party/ruthless_monster_8729385d83a2eca8551193f73bc617cbdb942d96ef5a50b513182595bf9c2d78.tar.gz)

[Mirror](https://drive.google.com/file/d/1JXKUiGk7gDs7ExLzBrdR2X1U9Fr17vh3/view?usp=drivesdk)

**Server:** [https://ruthless.monster](https://ruthless.monster)

**Server Backup:** [https://second.ruthless.monster/](https://second.ruthless.monster/)

**Author:** geolado


Take a little break in your journey, read some of our extravagant knowledgement to become your best version...

...and, of course, share your sentences with us.

**Server:** [https://small-talk.coach:1337](https://small-talk.coach:1337)

**Author**: [@vrechson](https://twitter.com/vrechson)


In Rhiza, professionals specializing in Artificial Intelligence are chosen
through a careful selection process. In this way, each professional carries a
digital signature on which the government can differentiates them from the rest
of the population. During her investigations, Laura found the system responsible
for signing and verifying such signatures. Will she be able to bypass this
system?

[Files](https://static.pwn2win.party/t00_rare_bc55b7a1f21286e3f9061cd6d66a24156ba053775571688c9e53626ad3649247.tar.gz)

[Mirror](https://drive.google.com/file/d/1vJjJUnJtvQA6hitNFKK2iSMzi_n2mHnL/view?usp=drivesdk)


**Server:** nc t00-rare.pwn2win.party 1337


Most of the obscure activities conducted by the Rhiza government are carried out on the continent to stay out of the Island's commoners' eyes and prevent information leakage. However, buildings on the Island storing potentially compromising material, such as the human genetics centre, have a rigid access control system.

Laura managed to compromise some computers in the government lab that develops this system. When analyzing the project, she found that the weakest point seems to be the electronic board that checks whether the access code to enter the buildings is correct. There is nothing special about the board itself: it is a Colorlight 5A-75B V7.0 board that, apparently, could be found very easily before the war. What is interesting is the bitfile programmed to the board, which is developed by the government lab.

Laura got access to the bitfile that the lab is testing. The specifications accompanying the bitfile state that the board can be accessed at 200.18.104.100 on UDP port 6000 after being connected to the network. Upon receiving the correct access code, it returns a datagram beginning with `OK`. Otherwise, it returns `NOK`. The project is apparently based on a customized version of LiteEth. Still, Laura was unable to gain access to the complete source code.

Reverse engineer the bitfile to find out which access code is accepted by the board.

**Curiosity**: If you don't have a Colorlight and want to see the bitfile working, you can submit it to [Rhiza's test infrastructure](https://fpga.pwn2.win). But it probably won't help you to solve the challenge. You really need to reverse engineer the bitfile.

**Authors**: [racerxdl](https://github.com/racerxdl), [thotypous](https://github.com/thotypous)

[Files](https://static.pwn2win.party/the_ethernet_from_above_2d0cc1b5cf46f22db915d2cd11107f44b1914b5b598516a58ece25c97fcdc916.tar.gz)

[Mirror](https://drive.google.com/file/d/1SL62dGFCpsZ8vP-kVa-rVbSOrXYuke2F/view?usp=drivesdk)


Shortly after Laura managed to reverse engineer the first version of the access control system, the government lab released a second version! The requirements document now contains the following specification: "the bitfile should work correctly only when programmed to official government boards".

Laura recalled the report of a similar mechanism described in the time capsule files. In 2018, Brazil, the country to which the island belonged, implemented a similar mechanism in the DREs they used to elect their politicians.

Knowing the [Rhiza test infrastructure](https://fpga.pwn2.win) programs the bitfile provided by the user to an official government board, find out which access code is accepted by this new version of the bitfile.

**Note**: You still need to reverse engineer the bitfile. But now, besides that, you also need to interact with the test infrastructure.

**Important**: The switch port to which the board is connected is filtered. Only packets coming from the 200.18.104.100 address are able to reach the internet.

**Authors**: [racerxdl](https://github.com/racerxdl), [thotypous](https://github.com/thotypous)

[Files](https://static.pwn2win.party/the_real_ethernet_from_above_8080da024d72ae77606a8db66fceb24d9496abf0193c9bbed828f7250e863036.tar.gz)

[Mirror](https://drive.google.com/file/d/1WX_4IRLEK-jSmAbWdwbau4jh2huPIHHB/view?usp=drivesdk)


A computer manufactured in the 1980s is on display in the Rhiza museum. That computer is never turned off and is kept running some MS-DOS software. It is said to contain one of the first advanced AI algorithms produced by mankind, which was programmed to answer the problem of faster-than-light space travel. The government keeps the computer running in the hope that someday the program will complete and show the result of its execution. Colonization of other planets would be the only means for humanity to expand again now that, according to the government, humans can't inhabit large regions outside Rhiza.

Laura knows that this is obviously nonsense. She suspects the program does something very straightforward, but that could not be implemented efficiently with the computers at the time. Are you able to unveil what this program is computing? Can you get the answer the program would show on screen, but much faster than it does?

**Authors**: [andre\_smaira](https://github.com/afsmaira), [thotypous](https://github.com/thotypous)

[Files](https://static.pwn2win.party/the_return_of_too_slow_ab535592439dc08deedc1c29e3c21659704f3357615f11737c938b7ca64ac8d0.tar.gz)

[Mirror](https://drive.google.com/file/d/1uDQlH-YTSWtouVxwMKBQ1EfEdOLJd7Pr/view?usp=drivesdk)


Now get the second password!

**Server:** nc baby-writeonly-password-manager.pwn2win.party 1337

**Server Backup:** nc baby-writeonly-password-manager-2.pwn2win.party 1337


In the years leading up to the war, radio amateurs built extraordinarily reliable and durable beacon transmitters. These transmitters can still be heard today on the radio waves that reach Rhiza and are even documented in high school textbooks!

Studying the files contained in the time capsule placed on the island by Telefonica and other companies in the 2020s, Laura recently came across a somewhat curious implementation of a WSPR transmitter.

This transmitter inserts a secondary modulation over WSPR, almost imperceptible to the naked eye. The call sign of the code's author corresponds precisely to one of the beacon stations that can be heard till today. This station is in the area where the Federal University of São Carlos was once located.

Can these transmitters reveal something that is not told by official government accounts? Perhaps they are linked to some resistance movement by the people overseas!

Unfortunately, the time capsule contains only the encoder's source code. Can you implement the corresponding decoder? Record the beacons transmitted every 10 min and feed them to your decoder, retrieving the contents of the transmitter's `flag.txt` file.

**Important note to 2021 competitors**

Use to your advantage that the planet has not yet been devastated! There are many public KiwiSDR, OpenWebRX and WebSDR receivers on the internet. Use these receivers to record the audio from the transmitter. You can also look at the [WSPRNet history](https://wsprnet.org/olddb?mode=html&band=all&limit=10000&findcall=PU2UID&findreporter=&sort=date) to observe which regions of the planet are receiving the signal at any given time. Schedule future recordings based on the knowledge of which areas usually receive the beacons at a particular time of the day.

Or just use a nearby receiver, that should be able to receive the signal at **all times**: [https://pu2uid.duckdns.org](https://pu2uid.duckdns.org).

We recommend that you record, as soon as possible, **at least** 4 broadcasts of the signal with a good signal-to-noise ratio (SNR) and without significant fading. Start recording the broadcasts even before implementing your decoder.

**Authors**: [thotypous](https://github.com/thotypous), [racerxdl](https://github.com/racerxdl)

**Special thanks to**: [marcoslaerte](https://github.com/marcoslaerte), [nutc4k3](https://github.com/nutc4k3)

[Files](https://static.pwn2win.party/wspr_decoy_0cb92fe3e0a9c2ad6686a06064ceaaacf8884c117ca9d75462f76cb5c0208c6b.tar.gz)

[Mirror](https://drive.google.com/file/d/1mfwQ-grs9AVSQpepBl21Y3EOdb-7fpMC/view?usp=drivesdk)
