Trojan.MSIL.Downloader.J
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: | 11,164 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 482 |
| First Seen: | December 30, 2012 |
| Last Seen: | June 13, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.MSIL.Downloader.J on your system indicates a potential security threat that requires immediate attention. This detection name suggests a type of malware that could be used to download additional malicious components, potentially leading to further system compromise. Understanding the nature of this threat and taking prompt action is crucial to protect your computer and sensitive information.
Table of Contents
What Is Trojan.MSIL.Downloader.J?
Trojan.MSIL.Downloader.J is identified as a Trojan-type threat, which typically means it is designed to allow unauthorized access to the victim's computer. The "Downloader" part of its name implies that it may be used to download and install additional malware or malicious software components. This type of malware can be particularly dangerous because it can lead to a variety of malicious activities on the infected computer, including data theft, ransom demands, or the installation of more malware.
How Trojan.MSIL.Downloader.J Operates
Trojan.MSIL.Downloader.J, like other Trojans, is likely to operate by disguising itself as legitimate software or by exploiting vulnerabilities in the system or applications to gain unauthorized access. Once inside, it can communicate with its command and control servers to receive instructions, which may include downloading additional malware. This malware can be highly adaptable and may evolve over time to evade detection by security software. Its primary goal is often to maintain a covert presence on the infected system, allowing the attackers to carry out their malicious intentions without being detected.
Symptoms of Infection
Symptoms of a Trojan.MSIL.Downloader.J infection can vary widely, depending on the specific goals of the attackers and the additional malware it downloads. Common signs include unusual system behavior, such as unexpected pop-ups, slow performance, or frequent crashes. You might also notice unfamiliar programs or toolbars in your browser, or find that your browser's homepage has been changed without your permission. In some cases, the infection might not display obvious symptoms, making it difficult to detect without the aid of security software.
How to Remove Trojan.MSIL.Downloader.J
- Boot your computer in Safe Mode with Networking. This will help prevent the malware from loading and make it easier to remove.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. Ensure the tool is updated with the latest definitions to increase the chances of detecting and removing the malware.
- Uninstall any suspicious programs that you do not recognize or that were installed around the time the malware was detected. Be cautious and only remove programs you are sure are not needed.
- Reset your web browsers (Chrome, Firefox, Edge) to their default settings. This can help remove any malicious extensions or settings changes made by the malware.
- Reboot your computer and perform another full scan with your anti-malware tool to ensure that the malware has been completely removed.
Conclusion
Removing Trojan.MSIL.Downloader.J requires careful and immediate action to prevent further damage to your system and to protect your personal data. By following the steps outlined above and maintaining vigilance with regular system scans and updates, you can significantly reduce the risk of malware infections. It's also important to practice safe computing habits, such as avoiding suspicious downloads and emails, to minimize the chance of future infections. Remember, staying informed and proactive is key to securing your digital environment.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Downloader.J |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
34ca6de64fe308eb6667953123155d98
SHA1:
ab3a2d61ee0670f78cf3f8626ab0c2a952e8f6ea
SHA256:
3B099DBA8E1B6493418F4D600DB9478EEDA9904FA2E2EB9FADC18ED114DEF6DD
File Size:
610.82 KB, 610816 bytes
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MD5:
890fe61c68c8e6fe6f4ba07ad8944d79
SHA1:
e479d8fecfc9b0ab8b8ab33d86e3acc9174a140a
SHA256:
C47E3791FB2FC1A2D71AFE6242B515E1BAC35B0320B4805DC62CF0BCF21B68B8
File Size:
189.95 KB, 189952 bytes
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MD5:
5c6c3eb103a172187f9c5656d56781d4
SHA1:
e205d3b00c7c39afeb8e91e210677226c16e334a
SHA256:
2733BB1CD0AE7673D259B1F2C2E71CB5E26C204479AD499C4CBE6B8EEE9039C7
File Size:
198.66 KB, 198656 bytes
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MD5:
d6dc6778f9278052dd7be8d8664419c5
SHA1:
e80147aea87557c3fa3f8ba9eb3a2dfade121a1f
SHA256:
31FA202997B00428C008768DDC00043FED77F87075E98023CF540DED7CF09BFA
File Size:
1.18 MB, 1176220 bytes
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MD5:
e643574554004cdc3a958cc218a2a8fb
SHA1:
20fe55cc59bc57353e76f2a3ceaa08da2da023b5
SHA256:
6AC94482E7757E83E4D6C9B6E901F826123E56969963548B3BC5E030FD5B4487
File Size:
352.26 KB, 352256 bytes
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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 relocations information
- File doesn't have security information
- File has been packed
- File has exports table
- File has TLS information
- File is 64-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
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- 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 |
|---|---|
| Comments | Limpiador de medios extraíbles |
| Company Name |
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| File Description |
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| File Version |
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| Internal Name | USB File Resc |
| Legal Copyright |
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| Legal Trademarks |
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| Original Filename |
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| Product Name |
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| Product Version |
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File Traits
- No Version Info
- packed
- VirtualQueryEx
- WinZip SFX
- x64
- ZIP (In Overlay)
- ZIPinO
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: | 1,092 |
|---|---|
| Potentially Malicious Blocks: | 279 |
| Whitelisted Blocks: | 812 |
| Unknown Blocks: | 1 |
Visual Map
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0 - Probable Safe Block
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? - Unknown Block
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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.GY
- Alien.A
- MSIL.Downloader.J
- Vemptik.A
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 | Generic Read,Write Attributes |
| \device\namedpipe | Generic Write,Read Attributes |
| \device\namedpipe\pshost.134219301117301458.8040.defaultappdomain.powershell | Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288 |
| c:\usb file resc\datos\estoy de acuerdo 2020-12.txt | Generic Write,Read Attributes |
| c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.1.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.2.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\4e59qa58.bat | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\85xr8qyw.bat | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_mtqg1zpm.4yb.ps1 | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_tryvapl2.klu.psm1 | Generic Write,Read Attributes |
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| c:\users\user\appdata\local\temp\cn8hgcnb.bat | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\qb749cf7.cf\winhttpjs.bat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\downloads\ p | Generic Write,Read Attributes |
| c:\users\user\downloads\ b | Generic Write,Read Attributes |
| c:\users\user\downloads\ g | Generic Write,Read Attributes |
| c:\users\user\downloads\ s | Generic Write,Read Attributes |
| c:\users\user\downloads\ c | Generic Write,Read Attributes |
| c:\users\user\downloads\ e | Generic Write,Read Attributes |
| c:\users\user\downloads\ h | Generic Write,Read Attributes |
| c:\users\user\downloads\ o | Generic Write,Read Attributes |
| c:\users\user\downloads\ p | Generic Write,Read Attributes |
| c:\users\user\downloads\ r | Generic Write,Read Attributes |
| c:\users\user\downloads\ s | Generic Write,Read Attributes |
| c:\users\user\downloads\ t | Generic Write,Read Attributes |
| c:\users\user\downloads\ d | Generic Write,Read Attributes |
| c:\users\user\downloads\ e | Generic Write,Read Attributes |
| c:\users\user\downloads\ o | Generic Write,Read Attributes |
| c:\users\user\downloads\ r | Generic Write,Read Attributes |
| c:\users\user\downloads\ w | Generic Write,Read Attributes |
| c:\users\user\downloads\ y | 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 |
|---|---|---|
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | 됅솬韆ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | ᘶ솯韆ǜ | RegNtPreCreateKey |
| HKCU\local settings\muicache\1b\52c64b7e::@c:\windows\system32\ndfapi.dll,-40001 | Windows Network Diagnostics | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 | -k � 8��8tX��B�8 �� �6 �v 5� �Z xy �� T�B� ������ � ���� �5����ee��Bx �< �!wz "Wc#�#��$kF$�� %"�%:� %�&� &�x(�(X�)�`*J*9*�"*�^*�h+�[,��/9� /��0P%1`1�1HO 1�D5�05�G | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | ₢偞ꋣǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | 姾偸ꋣǜ | RegNtPreCreateKey |
| HKCU\console::windowalpha | ó | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | ߞC��� | 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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20 additional items are not displayed above. |
| Process Manipulation Evasion |
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| Process Shell Execute |
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| Anti Debug |
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| User Data Access |
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| Process Terminate |
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| Encryption Used |
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| Other Suspicious |
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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.
cmd.exe /c ""C:\Users\Mdoqpycd\AppData\Local\Temp\4E59QA58.bat" "c:\users\user\downloads\e479d8fecfc9b0ab8b8ab33d86e3acc9174a140a_0000189952""
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C:\WINDOWS\system32\chcp.com chcp 65001
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WriteConsole: Active code page
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C:\WINDOWS\system32\net.exe net session
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C:\WINDOWS\system32\takeown.exe takeown /f "c:\Users\user\downloads\." /r /d n
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WriteConsole: ERROR:
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WriteConsole: This stream is n
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C:\WINDOWS\system32\cacls.exe cacls "c:\Users\user\downloads\." /t /e /p administrators:f
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WriteConsole: c:\Users\user\do
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C:\WINDOWS\system32\cacls.exe cacls "c:\Users\user\downloads\." /t /e /p users:f
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WriteConsole: The system canno
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cmd.exe /c ""C:\Users\Twluwncs\AppData\Local\Temp\85XR8QYW.bat" "c:\users\user\downloads\e205d3b00c7c39afeb8e91e210677226c16e334a_0000198656""
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " P" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " o" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " w" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " e" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " r" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " d" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " b" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:03 /R "+" " y" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " G" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " H" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " O" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " S" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " T" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " S" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " P" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " E" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " C" nul
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C:\WINDOWS\system32\findstr.exe findstr /v /a:0D /R "+" " R" nul
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C:\WINDOWS\system32\timeout.exe timeout /t 2
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C:\WINDOWS\system32\reg.exe REG ADD "HKCU\Console" /v "WindowAlpha" /t REG_DWORD /d "243" /f
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cmd.exe /c ""C:\Users\Blqekjvr\AppData\Local\Temp\CN8HGCNB.bat" "c:\users\user\downloads\e80147aea87557c3fa3f8ba9eb3a2dfade121a1f_0001176220""
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C:\WINDOWS\system32\mode.com MODE CON: COLS=33 LINES=25
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C:\WINDOWS\system32\timeout.exe timeout -t 0
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C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe Powershell Get-Date
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