Trojan.MSIL.Krypt.MBCK
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: | 17,561 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 173 |
| First Seen: | January 19, 2022 |
| Last Seen: | September 26, 2026 |
| OS(es) Affected: | Windows |
Trojan.MSIL.Krypt.MBCK is a Trojan horse detection that targets Windows computers. As its name suggests, it is written using the Microsoft .NET framework (MSIL) and relies on encryption, or "crypting," to hide its true code from security scanners. This threat was first identified in January 2022 and has continued to appear on systems through recent detections, indicating it remains active and is still being distributed in the wild. Like most Trojans, it does not announce itself to the user. It installs quietly in the background, often disguised as something harmless, and then carries out malicious instructions without the victim's knowledge or consent.
Table of Contents
What Trojan.MSIL.Krypt.MBCK Does
Once active on a system, a Trojan in this family typically works to establish a foothold and give an attacker varying degrees of control over the infected machine. Because the "Krypt" designation refers to an obfuscation or packing technique rather than a single fixed payload, the exact behavior can vary between infections. However, Trojans of this type commonly engage in activities such as:
- Downloading and installing additional malware onto the compromised computer
- Collecting sensitive information, including saved passwords, browsing history, or system details
- Modifying system or security settings to avoid detection and removal
- Allowing a remote attacker to issue commands or monitor activity on the infected device
- Creating backdoors that can be used to maintain long-term access to the system
Because this is a high-danger threat, users should treat any detection of it seriously and assume that sensitive data on the device may have been exposed.
How It Usually Spreads
Trojans like this one typically do not spread on their own. Instead, they rely on tricking users into installing them. Common infection methods for this category include malicious email attachments disguised as invoices, documents, or other legitimate-looking files, as well as downloads bundled with pirated software, cracked programs, or key generators. Fake software updates, deceptive advertisements, and compromised or untrustworthy download sites can also be used to deliver this type of Trojan onto a victim's computer.
Risks for the User
An active infection from this Trojan family can lead to serious consequences, including theft of personal or financial information, unauthorized access to accounts, installation of further malware such as ransomware or spyware, and a general loss of control over how the computer is used. Given its danger rating, users should not underestimate the potential damage this threat can cause if left unaddressed.
Signs of Infection
Because Trojans are designed to operate covertly, there may be few obvious symptoms. Users should watch for warning signs such as unexpected slowdowns, unfamiliar processes running in the background, programs or files appearing without explanation, unusual network activity, changes to security or browser settings that were not made by the user, or alerts from installed security software.
Staying Protected
To reduce the risk of infection, users should avoid opening email attachments or links from unknown or unexpected senders, refrain from downloading software from unofficial or pirated sources, keep the operating system and installed programs updated, and use reputable security software to scan downloads before opening them. Regularly backing up important files also helps minimize damage in case of infection. If Trojan.MSIL.Krypt.MBCK or similar threats are detected, the affected device should be scanned and cleaned promptly to prevent further compromise.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Krypt.MBCK |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
0dc7e16116415723445623c564bc21ff
SHA1:
4f471f4a8ae1d61fe6485de2e320cee10c67425a
SHA256:
95A19D8C9D57A8B5853A9622F552DABF8DC76995DCD2EBF8AB57A580ACAA5493
File Size:
67.07 KB, 67072 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 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)
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 | WindowsFormsApp17 |
| File Version | 1.0.0.0 |
| Internal Name | WindowsFormsApp17.exe |
| Legal Copyright | Copyright © 2025 |
| Original Filename | WindowsFormsApp17.exe |
| Product Name | WindowsFormsApp17 |
| Product Version | 1.0.0.0 |
File Traits
- .NET
- 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: | 382 |
|---|---|
| Potentially Malicious Blocks: | 27 |
| Whitelisted Blocks: | 339 |
| Unknown Blocks: | 16 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
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 |
Show More
|
| User Data Access |
|
| Anti Debug |
|
