Trojan.Ursu.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.
| Popularity Rank: | 17,309 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 7 |
| First Seen: | November 19, 2025 |
| Last Seen: | July 17, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Ursu.B on your system indicates a potential security threat that requires immediate attention. This detection name suggests a type of malicious software, but without more specific information, it's crucial to understand the general characteristics of such threats and how to mitigate them. In this report, we will guide you through the nature of Trojan.Ursu.B, its operational methods, symptoms of infection, removal procedures, and preventive measures to ensure your system's security.
Table of Contents
What Is Trojan.Ursu.B?
Trojan.Ursu.B, as indicated by its name, falls under the category of Trojan horses, which are malicious programs that disguise themselves as legitimate software. These types of malware can allow unauthorized access to a computer system, enabling the perpetrator to steal sensitive information, install additional malware, or disrupt system operations. The name Trojan.Ursu.B itself does not specify a known malware family but suggests a variant or specific strain of Trojan horse malware.
How Trojan.Ursu.B Operates
Trojan horses like Trojan.Ursu.B typically operate by deceiving users into installing them, often by masquerading as useful applications or piggybacking on legitimate software downloads. Once installed, they can create backdoors for remote access, allowing attackers to execute commands, steal data, or install more malware. The specific operations of Trojan.Ursu.B can vary, but the general goal is to compromise system security and exploit user data without detection.
Symptoms of Infection
Symptoms of a Trojan.Ursu.B infection can be subtle and may include unusual system behavior such as slow performance, frequent crashes, or pop-ups and unwanted software installations. Users may also notice unauthorized changes to their system settings or suspicious network activity. However, some Trojans are designed to operate stealthily, making them difficult to detect without proper security software.
How to Remove Trojan.Ursu.B
- 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 processes.
- Conduct a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all traces of Trojan.Ursu.B and any related malware.
- Uninstall suspicious programs that you do not recognize or that were installed around the time the malware was detected. Be cautious and ensure you are removing the correct programs to avoid disrupting your system's functionality.
- Reset your browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or settings changes made by the Trojan.
- Reboot your system and perform another scan with your anti-malware tool to ensure that all components of the Trojan have been removed and that your system is clean.
Conclusion
The detection and removal of Trojan.Ursu.B require careful attention to detail and a systematic approach to ensure that all traces of the malware are eliminated. By understanding the nature of Trojan horses and following the steps outlined in this report, you can effectively remove Trojan.Ursu.B from your system and take proactive measures to prevent future infections. Regularly updating your security software, being cautious with downloads, and maintaining good browsing habits are key to protecting your system against evolving malware threats.
Analysis Report
General information
| Family Name: | Trojan.Ursu.B |
|---|---|
| Signature status: | Hash Mismatch |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
807d442e33cd5ec3e504c33c9652fe95
SHA1:
a7306e88d7b5da1385a455edec4eef1f4869e34d
SHA256:
87FFA9F8593F8BCA690AA33C3AE9382E23940B1B35B8483D2EA8333DDF2034BE
File Size:
827.10 KB, 827096 bytes
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|
MD5:
55bb029fb7339540a0f58d1c8d8a42a5
SHA1:
009054214f8d7e81f584d0eb634e61cbdae536bf
SHA256:
ADA60B4B171ED5DE5B8C75B2FB2D29E72EB9C037ECE7CF45AA2A8DD8F429B0A1
File Size:
823.30 KB, 823296 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File has TLS information
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
- File is Native application (NOT .NET 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)
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 |
|---|---|
| Company Name | Roblox Corporation |
| File Description | Roblox |
| File Version |
|
| Legal Copyright | (C) 2012 Roblox Corporation. All rights reserved. |
| Original Filename | Roblox.exe |
| Product Name | Roblox Bootstrapper |
| Product Version | 1, 6, 3, 0 |
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 |
|---|---|---|
| Roblox Corporation | Symantec Class 3 Extended Validation Code Signing CA - G2 | Hash Mismatch |
| Roblox Corporation | thawte SHA256 Code Signing CA | Hash Mismatch |
File Traits
- HighEntropy
- 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: | 2,859 |
|---|---|
| Potentially Malicious Blocks: | 475 |
| Whitelisted Blocks: | 2,383 |
| Unknown Blocks: | 1 |
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.- Ursu.B
- Ursu.BF
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\temp\rbx-014de9cc.log | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\rbx-71a2f043.log | 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\roblox corporation\roblox::cpath | C:\Users\user\AppData\LocalLow\rbxcsettings.rbx | 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 |
|---|---|
| Network Winsock2 |
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| Network Info Queried |
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| Network Wininet |
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| Network Winhttp |
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