Backdoor.MSIL.DllInject.XSC
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: | 20,107 |
| Threat Level: | 60 % (Medium) |
| Infected Computers: | 6 |
| First Seen: | October 19, 2025 |
| Last Seen: | June 19, 2026 |
| OS(es) Affected: | Windows |
The detection of Backdoor.MSIL.DllInject.XSC on your system indicates a potential security threat that requires immediate attention. This backdoor threat is designed to allow unauthorized access to your computer, which can lead to a range of serious consequences, including data theft, system compromise, and further malware infections. It is essential to understand the nature of this threat and take prompt action to remove it and secure your system.
Table of Contents
What Is Backdoor.MSIL.DllInject.XSC?
Backdoor.MSIL.DllInject.XSC is a type of backdoor malware that uses dynamic-link library (DLL) injection techniques to evade detection and gain unauthorized access to a compromised system. The name suggests it is written in MSIL (Microsoft Intermediate Language), which is a platform-agnostic, object-oriented programming language used for building .NET applications. This backdoor is designed to bypass traditional security measures, allowing attackers to remotely control the infected system, steal sensitive information, or use the system as a launch point for further malicious activities.
How Backdoor.MSIL.DllInject.XSC Operates
The operation of Backdoor.MSIL.DllInject.XSC involves several steps, starting with the initial infection, which can occur through various means such as exploiting vulnerabilities, phishing attacks, or drive-by downloads. Once inside the system, the malware injects its DLL into a legitimate process to hide its presence and avoid detection by security software. From this position, it can communicate with its command and control (C2) servers to receive instructions, which might include downloading additional malware, stealing data, or creating a botnet. The use of DLL injection makes it challenging for traditional antivirus programs to detect this malware, as it does not write its malicious code directly to the disk but instead resides in memory.
Symptoms of Infection
Symptoms of a Backdoor.MSIL.DllInject.XSC infection can be subtle and may not always be immediately apparent. However, signs that your system might be compromised include unusual network activity, slower system performance, unexpected changes to system settings, or the appearance of unfamiliar programs. Additionally, if your antivirus software is disabled or certain security features are turned off without your knowledge, it could indicate the presence of malware. Given the stealthy nature of backdoors, it's crucial to rely on comprehensive security scans and monitoring tools to detect such threats.
How to Remove Backdoor.MSIL.DllInject.XSC
- Enter Safe Mode with Networking to prevent the malware from loading and to gain better control over your system for the removal process.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, which is capable of detecting and removing complex threats like backdoors.
- Uninstall any suspicious programs or applications that were installed around the time of the suspected infection. Be cautious and only remove programs you are certain are malicious or unnecessary.
- Reset your web browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings changes made by the malware.
- Reboot your system and perform another full scan with your anti-malware tool to ensure that the threat has been completely removed. Repeat this process until no more threats are detected.
Conclusion
The removal of Backdoor.MSIL.DllInject.XSC requires careful and thorough action to ensure that all components of the malware are eliminated from your system. After removal, it's essential to take preventive measures to avoid future infections, including keeping your operating system and software up to date, using strong antivirus protection, and practicing safe computing habits such as avoiding suspicious downloads and links. By understanding the nature of backdoor threats and taking proactive steps to secure your system, you can significantly reduce the risk of falling victim to these and other types of malware.
Analysis Report
General information
| Family Name: | Backdoor.MSIL.DllInject.XSC |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
d02a3c5a0c2c88728e215831fe5f014f
SHA1:
e4eb80e4d89ef98ee4468b815b4e7eaeebde975f
SHA256:
E5D8A5964F23D808C8E6E64DEC279C54F2ED7F0D053CB0DE06EF0AF1E39BCFA3
File Size:
5.38 MB, 5381632 bytes
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MD5:
877af60059f7c1d0be4202b71abb4cc9
SHA1:
c72405275f8ec4aeb46456ea64690a4b5a0a0634
SHA256:
5087F183B761E396D616DB0EEF9DE60FB91492622A44576BF1C8414DD0637560
File Size:
4.07 MB, 4072960 bytes
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MD5:
3c7c7af46e87484b978390630d91b2cb
SHA1:
9cfc567650a2efc5f8ba9d21c3d315700ab2b1be
SHA256:
175314F18D497FF293E59937B5247F70B727A96787F8EF476FC385281AC7818E
File Size:
3.49 MB, 3488256 bytes
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MD5:
c50da9cac8b2741cb40a4b3c281d11b1
SHA1:
675c3efffa588530cd99ac904a586b751c98ad37
SHA256:
A8049503B14698E9299506763061868235D1A1BE8E15163F1CFA2A54B708F047
File Size:
6.23 MB, 6231040 bytes
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MD5:
46c53950b677ed1b4b91c46188636535
SHA1:
42b94adb712ff0611d8ec4dbefa36ff9fcee7dc8
SHA256:
84DC6340E687F2E05B3671650C123A724825627EC4854FD55C13BD88721163A1
File Size:
2.73 MB, 2728960 bytes
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Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File doesn't have exports table
- File doesn't have relocations information
- File doesn't have security information
- File is .NET application
- File is 32-bit executable
- File is 64-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
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- 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 |
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| Assembly Version |
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| Comments | IMMORTAL |
| Company Name | IMMORTAL |
| File Description |
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| File Version |
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| Internal Name |
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| Legal Copyright |
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| Original Filename |
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File Traits
- .NET
- Agile.net
- Confuser
- CreateThread
- Fody
- HighEntropy
- ntdll
- VirtualQueryEx
- WriteProcessMemory
- x64
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- 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: | 785 |
|---|---|
| Potentially Malicious Blocks: | 150 |
| Whitelisted Blocks: | 368 |
| Unknown Blocks: | 267 |
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.- MSIL.DllInject.XSC
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 |
|---|---|
| Syscall Use |
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| User Data Access |
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| Anti Debug |
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| Encryption Used |
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