Trojan.Downloader.UA
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: | 3 |
| First Seen: | October 30, 2025 |
| Last Seen: | February 13, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Downloader.UA on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to download and install additional malicious software on your computer, which can lead to a range of problems, including data theft, system crashes, and unauthorized access to your personal information. It is essential to understand the nature of this threat and take prompt action to remove it from your system.
Table of Contents
What Is Trojan.Downloader.UA?
Trojan.Downloader.UA is a type of Trojan horse malware that is designed to download and install additional malicious software on your computer. The name "Trojan" refers to the fact that this type of malware disguises itself as a legitimate program or file, allowing it to bypass your system's security defenses. The ".Downloader" part of the name indicates that this malware is specifically designed to download and install additional malware on your system. The "UA" suffix may refer to a specific variant or subtype of the malware, but its exact meaning is not publicly known.
How Trojan.Downloader.UA Operates
Trojan.Downloader.UA typically operates by exploiting vulnerabilities in your system's security or by tricking you into installing it voluntarily. Once installed, it can download and install additional malware, including viruses, spyware, and ransomware. This malware can also modify your system's settings, steal your personal data, and provide unauthorized access to your computer. Trojan.Downloader.UA may also communicate with its command and control servers to receive updates, send stolen data, or download additional malware.
Symptoms of Infection
The symptoms of a Trojan.Downloader.UA infection can vary, but common signs include slow system performance, unexpected pop-ups or ads, and unfamiliar programs or icons on your desktop. You may also notice that your system is crashing or freezing frequently, or that your personal data is being stolen or modified. In some cases, you may not notice any symptoms at all, which is why it's essential to run regular virus scans and monitor your system's behavior closely.
- Slow system performance
- Unexpected pop-ups or ads
- Unfamiliar programs or icons on your desktop
- System crashes or freezes
- Stolen or modified personal data
How to Remove Trojan.Downloader.UA
- Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools.
- Download and install a reputable anti-malware tool, such as SpyHunter, and run a full scan to detect and remove Trojan.Downloader.UA and any related malware.
- Uninstall any suspicious programs or applications that may be related to the malware.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons.
- Reboot your system and run another full scan to ensure that the malware has been completely removed.
Conclusion
Removing Trojan.Downloader.UA from your system requires prompt and careful action. By following the steps outlined above, you can help to ensure that your system is safe and secure. It's also essential to take steps to prevent future infections, including keeping your operating system and software up to date, using strong antivirus software, and being cautious when downloading and installing programs or files from the internet. Remember that prevention is key, and staying informed about the latest malware threats is crucial to protecting your digital security.
Analysis Report
General information
| Family Name: | Trojan.Downloader.UA |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
3a58698389e097d8f3ed81bb0c9d5d23
SHA1:
ecc71da76d10a4cf8607de9174bf772aa6fc175b
SHA256:
A644523904E9C55443B146A46613CD94AAD80C3041BE3EE76AE60FA4EE279FCB
File Size:
330.24 KB, 330240 bytes
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MD5:
7a13cf1c92bbfe6dbe386f5aacdffb98
SHA1:
a451819416de63fa7b1f8e12e1d881a9819b6d96
SHA256:
C05132C12A44A3D49ADC0FEFB21D1B02BF7E62636CA864065E23F8FD74C2EE60
File Size:
330.24 KB, 330240 bytes
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Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have security information
- File is 64-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 Traits
- No Version Info
- x64
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: | 1,051 |
|---|---|
| Potentially Malicious Blocks: | 15 |
| Whitelisted Blocks: | 1,036 |
| 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.- Agent.THB
- Downloader.UA
- PSW.Agent.PF
- Trojan.Agent.Gen.ABC
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 |
|---|---|
| \device\namedpipe\dav rpc service | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| \device\namedpipe\pshost.134073044888090294.4840.defaultappdomain.powershell | Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288 |
| \device\namedpipe\pshost.134133937432152010.6360.defaultappdomain.powershell | Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288 |
| \device\namedpipe\wkssvc | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_0vbsuwip.cko.ps1 | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_2cwxu54c.hax.psm1 | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_ilgauyix.40y.ps1 | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_ivwhh1l1.sus.psm1 | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\yizhsyfgl.txt | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\ysrpiyfigl.txt | 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\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey | |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | ꯇ嘶効ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 烙嘻効ǜ | RegNtPreCreateKey |
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| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | �� @ xy kP~ �ރ ���� ��^ ۴� }� B Vs} A kP~ A ��1 ' �� ��� d B F e �J ��1 � �� h �n� } e�� e�� | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | 쪩ﲒ訚ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 떀ﲞ訚ǜ | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | �� 6 xy * � /�� Y� d� kP~ � � �ރ �p ��^ �o � ��z ee) Vs} kP~ ��1 � �� 7 � �� ﺃ e e�� ��1 �� f e�� h �n | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 | 0k 8��8tXz��B�8 �� �6 �v z 5� �Z xy �� T�B� ������ � ���� �5����ee +��Bx �< 5 � �!wz "Wc#�#��$kF$�� %"�%:� %�&� &�x(�(X�)�`*J*9*�"*�^*�h+�[,��/9� /��0P%1` | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 | 1k 8��8tXz��B�8 �� �6 �v z 5� �Z xy �� T�B� ������ � ���� �5����ee +��Bx �< 5 � �!wz "Wc#�#��$kF$�� %"�%:� %�&� &�x(�(X�)�`*J*9*�"*�^*�h+�[,��/9� /��0P%1` | 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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17 additional items are not displayed above. |
| Process Shell Execute |
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| Anti Debug |
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| User Data Access |
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| Encryption Used |
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| Other Suspicious |
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| Process Manipulation Evasion |
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Shell Command Execution
Shell Command Execution
This section lists Windows shell commands that are run by the samples in this family. Windows Shell commands are often leveraged by malware for nefarious purposes and can be used to elevate security privileges, download and launch other malware, exploit vulnerabilities, collect and exfiltrate data, and hide malicious activity.
open cmd.exe /C powershell.exe -NoProfile -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath "C:\Users""
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C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe powershell.exe -NoProfile -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath "C:\Users""
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C:\Windows\System32\cmd.exe "C:\Windows\System32\cmd.exe" /C powershell.exe -NoProfile -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath "C:\Users""
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