Trojan.MSIL.Keylogger.B
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: | 10,925 |
| First Seen: | January 7, 2013 |
| Last Seen: | December 12, 2025 |
| OS(es) Affected: | Windows |
The detection of Trojan.MSIL.Keylogger.B indicates that your system has been compromised by a malicious threat. This type of malware is designed to secretly monitor and record user activity, potentially leading to serious security breaches and data theft. It is essential to understand the nature of this threat and take immediate action to remove it and prevent further damage.
Table of Contents
What Is Trojan.MSIL.Keylogger.B?
Trojan.MSIL.Keylogger.B is a type of Trojan horse malware that focuses on keystroke logging, which means it can capture and record every keystroke made on the infected computer. This allows the malware to gather sensitive information such as passwords, credit card numbers, and other personal data. The "MSIL" part of the name suggests that the malware is written in Microsoft Intermediate Language, which is a platform-independent intermediate representation of the .NET Common Intermediate Language.
How Trojan.MSIL.Keylogger.B Operates
Once installed on a system, Trojan.MSIL.Keylogger.B operates stealthily, hiding from the user and security software. It can be distributed through various means, including infected software downloads, phishing emails, or exploited vulnerabilities in operating systems or applications. Upon execution, it may install additional components or connect to command and control servers to receive instructions or send stolen data. The keylogging functionality allows it to monitor and record user input, which can be used for malicious purposes such as identity theft, financial fraud, or unauthorized access to sensitive information.
Symptoms of Infection
Identifying a Trojan.MSIL.Keylogger.B infection can be challenging due to its stealthy nature. However, some common symptoms may include unusual system behavior, slow performance, unexpected pop-ups, or changes in browser settings. Users might also notice that their keyboard or mouse input is being recorded or that certain applications are behaving erratically. In some cases, the malware might cause system crashes or freezes, especially if it is conflicting with other software or if the system is under heavy load.
- Unexplained changes in system or application settings
- Appearance of unwanted or suspicious programs
- Slow system performance or frequent crashes
- Unusual network activity or data usage
How to Remove Trojan.MSIL.Keylogger.B
- Boot your computer in Safe Mode with Networking to limit the malware's ability to interfere with the removal process.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all components of the malware.
- Uninstall any suspicious programs or applications that were installed around the time of the infection.
- Reset your web browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings changes.
- Reboot your computer and perform another full scan to ensure that all remnants of the malware have been removed.
Conclusion
Removing Trojan.MSIL.Keylogger.B requires careful and thorough steps to ensure that all components of the malware are eliminated from the system. It is crucial to act quickly to prevent further data theft and potential damage. After removal, it is recommended to change all passwords, monitor financial and personal accounts for any suspicious activity, and maintain up-to-date antivirus software to protect against future threats. Regular system backups and adherence to safe computing practices can also help in preventing similar infections in the future.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Keylogger.B |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
7d940b57682a7ecb26fef5c2051727bb
SHA1:
f83f7069505598e3f63a706f57e17af925fcfc3f
SHA256:
6668697465B825984AE16D116E20CC3085C59D02019089406D75273428770466
File Size:
7.68 KB, 7680 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have security information
- File is .NET application
- File is 32-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
- File is either console or GUI application
- 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)
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 | 1.0.0.0 |
| File Description | KeyloggerSample |
| File Version | 1.0.0.0 |
| Internal Name | KeyloggerSample.exe |
| Legal Copyright | Copyright © 2022 |
| Original Filename | KeyloggerSample.exe |
| Product Name | KeyloggerSample |
| Product Version | 1.0.0.0 |
File Traits
- .NET
- Run
- 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: | 5 |
|---|---|
| Potentially Malicious Blocks: | 5 |
| Whitelisted Blocks: | 0 |
| Unknown Blocks: | 0 |
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.Keylogger.B
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:\windowsh\f83f7069505598e3f63a706f57e17af925fcfc3f_0000007680 | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
| c:\windowsh\h.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windowsh\h.dat | Generic Write,Read Attributes |
Registry Modifications
Registry Modifications
This section lists registry keys and values that were created, modified and/or deleted by samples in this family. Windows Registry activity can provide valuable insight into malware functionality. Additionally, malware often creates registry values to allow itself to automatically start and indefinitely persist after an initial infection has compromised the system.| Key::Value | Data | API Name |
|---|---|---|
| HKCU\software\microsoft\windows\currentversion\run::f83f7069505598e3f63a706f57e17af925fcfc3f_0000007680 | C:\WindowsH\f83f7069505598e3f63a706f57e17af925fcfc3f_0000007680 | RegNtPreCreateKey |
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 |
|
| Other Suspicious |
|
| Encryption Used |
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