Trojan.MSIL.Blocker.RB
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.
| Threat Level: | 80 % (High) |
| Infected Computers: | 242 |
| First Seen: | August 31, 2023 |
| Last Seen: | October 6, 2025 |
| OS(es) Affected: | Windows |
The detection of Trojan.MSIL.Blocker.RB indicates that your system has been compromised by a potentially malicious program. It is essential to understand the nature of this threat and take immediate action to remove it to prevent further damage. This report provides an overview of the threat, its operational characteristics, symptoms of infection, and steps to remove it from your system.
Table of Contents
What Is Trojan.MSIL.Blocker.RB?
Trojan.MSIL.Blocker.RB is a type of Trojan horse malware that can compromise the security of your computer system. Trojan horses are malicious programs that disguise themselves as legitimate software, allowing them to bypass security measures and gain unauthorized access to your system. The name Trojan.MSIL.Blocker.RB suggests that it may be related to the .NET framework (MSIL stands for Microsoft Intermediate Language) and could have blocking capabilities, but without specific details, it's crucial to focus on general removal and protection strategies.
How Trojan.MSIL.Blocker.RB Operates
Trojan-type malware, including Trojan.MSIL.Blocker.RB, typically operates by exploiting vulnerabilities in software or tricking users into installing it. Once installed, it can perform a variety of malicious actions, such as stealing personal data, installing additional malware, or providing unauthorized access to your system. The specific operations of Trojan.MSIL.Blocker.RB can vary, but the goal is often to compromise your system's security and privacy for the benefit of the malware's creators.
Symptoms of Infection
Symptoms of a Trojan.MSIL.Blocker.RB infection can vary widely depending on its intended purpose. Common signs include unexpected changes to your system settings, unfamiliar programs or icons, slow system performance, frequent crashes, or pop-ups and other unwanted advertisements. If you suspect your system is infected, it's crucial to act quickly to minimize potential damage.
How to Remove Trojan.MSIL.Blocker.RB
- Boot your computer in Safe Mode with Networking. This will help prevent the malware from loading and give you a cleaner environment to work in.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. Ensure the tool is updated with the latest definitions to increase the chances of detecting and removing the malware.
- Uninstall any recently installed programs that you do not recognize or that were installed around the time you noticed the infection. Be cautious and only uninstall programs you are sure are safe to remove.
- Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings. This can help remove any malicious extensions or settings changes made by the malware.
- Reboot your computer and perform another full scan with your anti-malware tool to ensure that the malware has been completely removed.
Conclusion
Removing Trojan.MSIL.Blocker.RB from your system requires careful and immediate action. By understanding the nature of this threat and following the steps outlined above, you can help protect your system and personal data from further compromise. Remember, prevention is key; keeping your operating system, software, and security tools up to date, along with practicing safe computing habits, can significantly reduce the risk of future infections. If you are unsure about any part of the removal process, consider seeking help from a professional to ensure your system is thoroughly cleaned and secured.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Blocker.RB |
|---|---|
| Signature status: | Hash Mismatch |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
218bf9394d4b2227a9a831b82030f276
SHA1:
fc1daca15c6e77bc395ad1624663588815369316
SHA256:
843B46AC6A98353E6012824B5E0328C364545BB2ACA23B63BD16A98E239CD0BE
File Size:
3.88 MB, 3884368 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File doesn't have exports table
- File is .NET application
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
- File is not packed
- IMAGE_FILE_DLL is not set inside PE header (Executable)
- 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.
Windows PE Version Information
Windows PE Version Information
This section displays values and attributes that have been set in the Windows file version information data structure for samples within this family. To mislead users, malware actors often add fake version information mimicking legitimate software.| Name | Value |
|---|---|
| Assembly Version | 12.13.7.1 |
| Comments | iTunes |
| Company Name | Apple Inc. |
| File Description | iTunes |
| File Version | 12.13.7.1 |
| Internal Name | Mgtkewnppw.exe |
| Legal Copyright | © 2000–2025 Apple Inc. All rights reserved. |
| Original Filename | Mgtkewnppw.exe |
| Product Name | iTunes |
| Product Version | 12.13.7.1 |
Digital Signatures
Digital Signatures
This section lists digital signatures that are attached to samples within this family. When analyzing and verifying digital signatures, it is important to confirm that the signature’s root authority is a well-known and trustworthy entity and that the status of the signature is good. Malware is often signed with non-trustworthy “Self Signed” digital signatures (which can be easily created by a malware author with no verification). Malware may also be signed by legitimate signatures that have an invalid status, and by signatures from questionable root authorities with fake or misleading “Signer” names.| Signer | Root | Status |
|---|---|---|
| Apple Inc. | DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1 | Hash Mismatch |
| Apple Inc. | DigiCert Trusted Root G4 | Hash Mismatch |
File Traits
- .NET
- HighEntropy
- RijndaelManaged
- 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: | 6,432 |
|---|---|
| Potentially Malicious Blocks: | 220 |
| Whitelisted Blocks: | 4,835 |
| Unknown Blocks: | 1,377 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
Files Modified
Files Modified
This section lists files that were created, modified, moved and/or deleted by samples in this family. File system activity can provide valuable insight into how malware functions on the operating system.| File | Attributes |
|---|---|
| c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.0.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.1.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.2.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\roaming\microsoft\windows\start menu\programs\startup\smdll.vbs | Generic Write,Read Attributes |
| c:\users\user\appdata\roaming\smdll.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
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 |
|---|---|
| User Data Access |
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| Encryption Used |
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| Anti Debug |
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| Other Suspicious |
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| Process Terminate |
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