Trojan.MSIL.Krypt.YDAG
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: | 434 |
| First Seen: | June 28, 2021 |
| Last Seen: | April 14, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.MSIL.Krypt.YDAG on a computer system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the integrity of a system, often leading to unauthorized access, data theft, or other malicious activities. It is essential to understand the nature of this threat and take appropriate measures to remove it and prevent future infections.
Table of Contents
What Is Trojan.MSIL.Krypt.YDAG?
Trojan.MSIL.Krypt.YDAG is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate programs. The name suggests it may be related to MSIL (Microsoft Intermediate Language), which is a part of the .NET Framework, but without more specific information, it's challenging to determine its exact origins or the specific family it belongs to. Trojans are known for their ability to bypass security mechanisms and cause harm to infected systems, making them a significant concern for computer users.
How Trojan.MSIL.Krypt.YDAG Operates
Malware like Trojan.MSIL.Krypt.YDAG typically operates by exploiting vulnerabilities in software or tricking users into installing it. Once installed, it can perform a variety of malicious actions, including but not limited to, stealing personal data, installing additional malware, or providing unauthorized access to the infected system. The exact operation can vary widely depending on the intentions of the malware creators. Understanding how such malware operates is crucial for developing effective removal and prevention strategies.
Symptoms of Infection
Symptoms of a Trojan.MSIL.Krypt.YDAG infection can be varied and subtle, making it difficult for users to detect the malware without proper scanning tools. Common signs include unexpected changes in system performance, such as slow downs or crashes, appearance of unfamiliar programs or icons, and unexpected network activity. In some cases, the malware may not exhibit noticeable symptoms, emphasizing the importance of regular system scans and updates.
How to Remove Trojan.MSIL.Krypt.YDAG
- Enter Safe Mode with Networking to limit the malware's ability to interfere with the removal process. This mode allows you to use the internet to download removal tools while minimizing system activity.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. Ensure the tool is updated to the latest version to increase the chances of detecting and removing the malware.
- Uninstall suspicious programs that you do not recognize or that were installed around the time the malware was detected. Be cautious and only uninstall programs you are certain are not needed by your system.
- Reset your browsers (Chrome, Firefox, Edge, etc.) to their default settings. This can help remove any malicious extensions or settings that the malware may have altered.
- After completing the above steps, reboot your system and perform another full scan to ensure that the malware has been completely removed.
Conclusion
The removal of Trojan.MSIL.Krypt.YDAG requires careful and systematic steps to ensure the malware is completely eradicated from the system. It's also crucial to adopt preventive measures, such as keeping software up to date, using strong antivirus programs, and being cautious with email attachments and downloads from the internet. By understanding the nature of this threat and how to remove it, users can protect their systems and data from similar threats in the future. Regular maintenance and vigilance are key to maintaining a secure computing environment.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Krypt.YDAG |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
b5bc465434febde0104390f558685bff
SHA1:
76e80c85acc95fdd66fdc5434a86726c3ebf1ec5
SHA256:
A6E45522118DEDA688BF11DA7DD6765495960822BE5D433682C86374D1E5F709
File Size:
693.76 KB, 693760 bytes
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MD5:
e9aed501a999b71ece211131b61e7a6d
SHA1:
62eedb0370c184ea10f12209f4fca4f7783da882
SHA256:
202F9715AD5C4AADE1CFE0ECD7E9396D72381CE5A7F3E4662563F0EBEC745B33
File Size:
2.13 MB, 2131456 bytes
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MD5:
8a324e45de05ec09e89e698768898dbe
SHA1:
f16105ca0da5f625e1462fa1d1088a42a1eb30fc
SHA256:
A6DD268F6E0EFD64D976AA70F4C8E57C38560ED56C99B836CE9224BC15D3A353
File Size:
1.65 MB, 1650176 bytes
|
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 security information
- 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)
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- 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 |
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| File Description | csrss |
| File Version |
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| Internal Name |
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| Legal Copyright |
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| Original Filename |
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| Product Name | csrss |
| Product Version | 1.0.0.0 |
File Traits
- .NET
- CryptUnprotectData
- GenKrypt
- HighEntropy
- No CryptProtectData
- ntdll
- Reactor
- Reflective
- RijndaelManaged
- WriteProcessMemory
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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: | 400 |
|---|---|
| Potentially Malicious Blocks: | 4 |
| Whitelisted Blocks: | 348 |
| Unknown Blocks: | 48 |
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.Agent.AKM
- MSIL.AgentTesla.PH
- MSIL.Mardom.S
- MSIL.Mardom.SA
- MSIL.Mardom.SB
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- MSIL.Mardom.SE
- MSIL.Stealer.RACC
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\froorbnzjifojri::froorbnzjifojri | fRooRBNzjiFOJrI | RegNtPreCreateKey |
| HKLM\software\microsoft\tracing\rasapi32::enablefiletracing | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasapi32::enableautofiletracing | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasapi32::enableconsoletracing | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasapi32::filetracingmask | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasapi32::consoletracingmask | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasapi32::maxfilesize | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasapi32::filedirectory | %windir%\tracing | RegNtPreCreateKey |
| HKLM\software\microsoft\tracing\rasmancs::enablefiletracing | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasmancs::enableautofiletracing | RegNtPreCreateKey |
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| HKLM\software\microsoft\tracing\rasmancs::enableconsoletracing | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasmancs::filetracingmask | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasmancs::consoletracingmask | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasmancs::maxfilesize | RegNtPreCreateKey | |
| HKLM\software\microsoft\tracing\rasmancs::filedirectory | %windir%\tracing | 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 |
|---|---|
| Syscall Use |
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10 additional items are not displayed above. |
| User Data Access |
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| Encryption Used |
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| Other Suspicious |
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| Anti Debug |
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| Network Winsock2 |
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| Network Winsock |
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| Network Winhttp |
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| Network Info Queried |
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