RarVault Ransomware
Threat Scorecard
EnigmaSoft Threat Scorecard
EnigmaSoft Threat Scorecards are assessment reports for different malware threats which have been collected and analyzed by our research team. EnigmaSoft Threat Scorecards evaluate and rank threats using several metrics including real-world and potential risk factors, trends, frequency, prevalence, and persistence. EnigmaSoft Threat Scorecards are updated regularly based on our research data and metrics and are useful for a wide range of computer users, from end users seeking solutions to remove malware from their systems to security experts analyzing threats.
EnigmaSoft Threat Scorecards display a variety of useful information, including:
Popularity Rank: The ranking of a particular threat in EnigmaSoft’s Threat Database.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Infected Computers: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
See also Threat Assessment Criteria.
| Popularity Rank: | 15,031 |
| Threat Level: | 10 % (Normal) |
| Infected Computers: | 6,316 |
| First Seen: | September 7, 2016 |
| Last Seen: | November 16, 2025 |
| OS(es) Affected: | Windows |
The RarVault Ransomware was discovered by the researcher Michael Gillespie who uses the alias Demonslay356 and is responsible for cracking threats like CryptoHost and several other. The RarVault Ransomware is a Trojan that may be delivered to users via spam mail and corrupted links. The RarVault Ransomware is found in spam emails written in Russian, which suggest that the RarVault Ransomware is used against Russian-speaking users predominantly. The RarVault Ransomware is part of the CryptoHost family and behaves identically to the Bart Ransomware.
As you may know, the Bart Ransomware does not encrypt data and is programmed to transfer the user's files into a password protected archive and demand ransom to release the correct password. The RarVault Ransomware is identical and can transfer text documents, presentations, photos, spreadsheets, databases, and videos up to 50 MB to a secure archive. The vault used by the ransomware at hand is locked with a 128-bit long password and is virtually impossible to unlock through brute force attacks. While the RarVault Ransomware is working, users might notice an increased load on their CPU and read/write alerts from Windows. The RarVault Ransomware is programmed to scan the infected PC for a list of connected drives and will choose the drive with most free space to host the vault with your files.
The transfer of the data is followed by the display of the ransom note which is an HTA file named 'RarVault.' RarVault.hta might run from the hidden Temp folder and will show the ransom message as an interactive program window saying:
'Ваши документы и файлы были перемещены в архив
Для их восстановить их необходимо Ваш получить пароль
Перейдите на наш сайт:
hXXp://RarVault.myfreesites(dot)net/
Напишете нам писмо:
RarVault@ruggedinbox.com'
Translated version:
'Your documents and files have been moved to an archive
To recover them you will need to receive your password
Visit our site:
hXXp://RarVault.myfreesites(dot)net/
Write us an email:
RarVault@ruggedinbox.com'
The site RarVault.myfreesites.net will present the visitor with the following text:
'Как я могу восстановить мои файлы?
Для восстановления файлов, Вам необходимо выслать на адрес: RarVault@ruggedinbox.com письмо и приложить к нему файлы "Rar_Vault_User.txt" и "Rar_Vault_User.rar" (находиться или в "корне" диска С:\ или C:\RarVault\), в которых содержится Ваш уникальный идентификационный номер, после этого пополнить свой личный кошелек (номер кошелька мы вышлем Вам на почту) на сумму - 1 Биткоин (около 250 USD, сумма может меняться, в зависимости от важности информации и составлять от 1 Биткоина до 50).
До полного восстановления Ваших файлов, ни в коем случае нельзя удалять или перемещать файл "Rar_Vault_User.txt", для предотвращения смены Вашего уникального идентификационного номера.
После пополнения Вашего кошелька, когда стоимость будет полностью погашена - Вам автоматически будет выслан пароль для разархивации.
Увы, Вы не сможете разархивировать Ваши файлы без Вашего уникального пароля. Ни системные администраторы, ни программисты, ни антивирусные компании и даже разработчики программ-архиваторов не смогут Вам помочь. Учитывайте, что Ваши файлы в архиве защищены при помощи криптостойкого алгоритма шифрования AES-256 с функцией деривации ключа основанной на PBKDF2 с использованием HMAC-SHA256.'
Translated in English:
'How can I restore my files?
To restore files, you should be sent an email to: RarVault@ruggedinbox.com and attach the file "Rar_Vault_User.txt" and "Rar_Vault_User.rar" (they will be in the "root" of drive C:\ or C:\RarVault\), which contains your unique ID number. Then fill up your personal account (account number will send to your email) the sum of - 1 Bitcoins (about 250 USD, the amount may vary, depending on the importance of the information, and may be from 1 Bitcoins to 50).
Prior to the full recovery of your files, in any case you can not delete or move the file "Rar_Vault_User.txt", to prevent the change of your unique identification number.
After your wallet is charged, and the cost is fully paid - you will automatically be sent a password to unzip.
Alas, you will not be able to unzip your files without your unique password. Neither system administrators or programmers or even anti-virus companies and software developers, will not be able to help you. Keep in mind that your files in the archive are protected by means of cryptographically strong AES-256 encryption algorithm with a key derivation function based on PBKDF2 using HMAC-SHA256.'
The payment of the ransom shouldn't be made because the malware actors behind the RarVault Ransomware may not send out the correct password for 'Rar_Vault_User.rar'. The payment required is small compared to threats like the Flyper Ransomware and the NullByte Ransomware, but you need not lose your files and money on the same day. Security experts advise computer users to incorporate a backup solution into their OSes and take advantage of the Shadow Volume Copies by Windows to restore their data. You should not comply with the terms of the RarVault Ransomware and save your money. It is a good measure to install a reputable anti-malware suite to delete the RarVault Ransomware and improve your cyber defense.
Table of Contents
Analysis Report
General information
| Family Name: | PUP.InstallUnion.A |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
ff699c1757f9c0f08f92140e1471d63c
SHA1:
a2fe201d0a474e9fef70feec62f3da760711287a
SHA256:
8162F515BF3A15E50893868213246A0E7579CA74B5DBC63300F463BB8104DB61
File Size:
5.00 MB, 4996339 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have security information
- File has TLS information
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
- File is Native application (NOT .NET application)
- File is not packed
- IMAGE_FILE_DLL is not set inside PE header (Executable)
Show More
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Icons
File Icons
This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.
File Traits
- HighEntropy
- imgui
- No Version Info
- x86
Block Information
Block Information
During analysis, EnigmaSoft breaks file samples into logical blocks for classification and comparison with other samples. Blocks can be used to generate malware detection rules and to group file samples into families based on shared source code, functionality and other distinguishing attributes and characteristics. This section lists a summary of this block data, as well as its classification by EnigmaSoft. A visual representation of the block data is also displayed, where available.| Total Blocks: | 13,606 |
|---|---|
| Potentially Malicious Blocks: | 2,829 |
| Whitelisted Blocks: | 10,776 |
| Unknown Blocks: | 1 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
Similar Families
Similar Families
This section lists other families that share similarities with this family, based on EnigmaSoft’s analysis. Many malware families are created from the same malware toolkits and use the same packing and encryption techniques but uniquely extend functionality. Similar families may also share source code, attributes, icons, subcomponents, compromised and/or invalid digital signatures, and network characteristics. Researchers leverage these similarities to rapidly and effectively triage file samples and extend malware detection rules.- InstallUnion.A
Windows API Usage
Windows API Usage
This section lists Windows API calls that are used by the samples in this family. Windows API usage analysis is a valuable tool that can help identify malicious activity, such as keylogging, security privilege escalation, data encryption, data exfiltration, interference with antivirus software, and network request manipulation.| Category | API |
|---|---|
| Network Winsock2 |
|
| Network Winsock |
|
| Anti Debug |
|
| User Data Access |
|
| Network Wininet |
|
| Network Winhttp |
|
