In this comprehensive article, we’ll try to answer are fully undetectable crypter still in use? Then we try to exploring the demand for FUD crypters, the validity of their “Fully undetectable” claims, and the potential use cases among different types of cybercriminals.

We’ll also examine the legal status of FUD crypters and the ongoing efforts by security researchers and authorities to combat their misuse. By the end of this article, you’ll have a deeper understanding of the realities and misconceptions surrounding these elusive tools. If you don’t know what is crypter software read our posts.

The Demand for Fully Undetectable Crypters

Are fully undetectable crypters still in use? To answer this, we should examine market demand. High demand would suggest hackers still use these tools. We need to check if crypters remain popular for bypassing antiviruses. It’s also important to see if new tools have replaced crypters. Market analysis can reveal current hacker preferences.
In short, FUD crypters are in demand for various reasons. Some are legitimate, while others are not. Software developers may use them to protect their work. These tools can hide proprietary code from prying eyes. They prevent reverse engineering and unauthorized use. FUD crypters obfuscate sensitive software parts. This is similar to how encryption protects data.
However, malicious actors, such as hackers, malware authors, and ransomware operators, are constantly seeking ways to evade detection and bypass security measures. FUD crypters hide malicious payloads. This concealment makes it harder for victims to identify threats. Crypters disguise harmful code. As a result, users may not recognize potential dangers in files or programs. Watch the video of how make fud file with a crypter.

So, cybercriminals want to create malware that bypasses security measures. This allows them to carry out their illegal activities more easily. They aim for greater success in their attacks. Reliable malware distribution is their goal. They seek ways to avoid detection by security systems.
In short, most of malware developer don’t focus on FUD and suggest buy FUD malware encryptor. Also, Fully undetectable crypter (FUD) developers often use platforms like Telegram and dark web forums to advertise and sell their services.

The Data Encoder Crypter team’s investigation shows that the demand for FUD encoders is very high in 2024, but in the coming years, the combined versions of this software with Quantum encryption algorithms and artificial intelligence will attract the attention of more users.
The sales of encryption sellers in underground markets and social and private networks, as well as the high number of encrypted files (a small part of which are uploaded to websites such as VirusTotal) show the high level of use of this encryption tool.
Also, the huge statistics of daily cyber attacks published by antiviruses show that common tools such as Fully Undetectable Crypter are the main means of bypassing antiviruses.

Are claims of being “fully undetectable” often exaggerated?

In 2024, as we write this article, most crypter sellers who claim to provide FUD results are scammers. These individuals either use free FUD crypter cores, which we’ve previously explained why they don’t bypass antivirus software, or they use existing crypters with Shared STUB products and offer per-crypt services.

Briefly, per-crypt means that for a fee ranging from $15 to $150, they only receive one payload from the customer and deliver it back in encrypted form. Therefore, the customer doesn’t have access to the software and only receives the encrypted malware.

Crypter sellers make claims about being “fully undetectable.” However, these claims are often exaggerated. To answer this question accurately, we must consider several key points. These points directly affect the results of FUD (fully undetectable) testing.
  • Use updated and maintained apps:

Malware that isn’t updated will have its core and modules immediately detected by antivirus software and security firewalls. Therefore, using up-to-date tools is one of the main points. Note the most updated ransomware needs to be FUD too. Remember that fully undetectable crypters only encrypt the payload and cannot edit or change malicious codes. For more information, study process hollowing and PE injection.

  • Private STUB and Shared STUB of fully undetectable crypter :

Another important point is the type of STUB used in the software. Most FUD crypter sellers use Shared STUB, meaning the STUB is encrypting files for many customers. As a result, malicious files are quickly detected, and the results are no longer FUD.

If you search forums and Telegram groups, you’ll notice that most crypter buyers complain about FUD results. The reason for this dissatisfaction among cybercriminals and hackers is poor FUD results in Scantime and Runtime. However, due to the economical price of these crypters, ranging from $50 to $150, they still purchase them. We recommend reading the article “FUD Runtime Crypter” to become more familiar with this concept.

So, Sellers of “fully undetectable crypter” often use shared STUB files. This is because creating a custom STUB requires specialized expertise. It also takes significant time for each individual customer. Shared STUB crypter sellers update their STUB in two global time zones, Asia and America, to partially fix FUD results and address customer dissatisfaction.

On the other hand, private STUB crypter create a STUB exclusively for one customer. Professional sellers may even write a crypter specifically for a particular antivirus at the customer’s request, allowing the hacker to target their goal with high precision. Therefore, for these types of crypters, claims of being “fully undetectable aren’t exaggerated”. These custom crypters cost between $150 and $6000 and are usually purchased by cybercrime groups rather than beginners.

Briefly, polymorphic crypters have good FUD results. But you shouldn’t look for them in the 2024 market because all sellers claiming to offer polymorphic crypters are fraudulent. To keep this article from getting too long, make sure to read about polymorphic crypter.

  • Use clean and proper spreading methods:

The methods of spreading malware directly affect file detection. We’ll try to address this in a separate article.

  • Use hosts that do not distribute samples:

Antivirus software lists free hosts that novice criminals use. Security systems, such as Windows Defender SmartScreen, check file sources. Popular browsers like Chrome also compare downloads against their lists. These measures help protect users from potentially harmful files.

Do certain types of cybercriminals use fully undetectable crypter?

The use of FUD Crypters extends beyond individual hackers. Organized cybercrime groups also employ these tools in their operations. They may use crypter features as part of larger malware campaigns or targeted attacks, increasing the overall threat landscape. They may also target specific industries or organizations, making their attacks more targeted and effective.

Challenges for Traditional Security Solutions
Traditional security solutions struggle against fully undetectable crypter. Signature-based detection methods often fail to identify newly encrypted malware variants. This limitation has pushed the cybersecurity industry to develop more advanced detection techniques.
Advanced Detection Techniques
It’s important to note that the effectiveness of FUD crypters can also be influenced by factors such as the specific malware being concealed, the quality of the crypter itself, and the resources and expertise of the security teams tasked with detecting and mitigating the threats. In some cases, a FUD crypter may be effective for a limited time, but eventually, it will be detected and neutralized by the security community.
Behavioral Analysis: Security solutions now focus on identifying suspicious activities rather than relying solely on known malware signatures. This approach helps detect crypted malware that may appear benign at first glance.
Machine Learning and AI: These technologies can analyze patterns and behaviors to identify potential threats, even if they’re encrypted or obfuscated. As crypters evolve, so do the AI-powered detection methods.

What is the legal status of fully undetectable crypter?

The legal status of FUD Crypters is somewhat ambiguous. While the tools themselves may not be illegal, using them to create and distribute malware is often a crime. Some argue that crypters have legitimate uses, such as protecting intellectual property, but their primary use remains malicious.
The development and sale of FUD Crypters also raise ethical concerns. Some vendors claim their tools have legitimate uses. However, these tools are mainly for malicious purposes. Criminals often use such tools to cause harm. Users should be cautious when downloading tools from unknown sources. This gray area complicates enforcement efforts and highlights the need for clear legal frameworks to address the threat of FUD Crypters.


In conclusion, fully undetectable (FUD) crypters remain a significant and evolving component of the cybersecurity landscape in 2024. Despite the challenges in achieving true undetectability, the demand for these tools persists, driven by both legitimate software protection needs and malicious intent.
Key Takeaways:

  • Persistent Demand: The market for FUD crypters continues to thrive, particularly in underground forums and dark web marketplaces, indicating their ongoing use and relevance.
  • Evolving Technology: The future of FUD crypters is likely to involve integration with quantum encryption algorithms and artificial intelligence, potentially increasing their effectiveness.
  • Varied Effectiveness: While many claims of “fully undetectable” are exaggerated, especially among cheaper, shared STUB options, high-end private STUB crypters can still achieve significant levels of evasion.
  • Cybercriminal Usage: FUD crypters remain a tool of choice for various cybercriminals, from individual hackers to organized crime groups, for evading detection in malware campaigns.
  • Security against Fully undetectable crypter: The persistent use of FUD crypters has spurred the development of more advanced detection techniques, including behavioral analysis and AI-powered solutions.
  • Legal Gray Area: While the creation and sale of crypters exist in a legal gray area, their use in malicious activities is clearly illegal in most jurisdictions.

Cybersecurity measures are advancing. This challenges the techniques used by those trying to evade detection. However, increasingly sophisticated detection methods and proactive security measures will continue to counter these evasion techniques. Security teams constantly work to stay ahead of evolving threats.