Adware.MSIL.BrowserAssistant.D
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: | 3,582 |
| Threat Level: | 20 % (Normal) |
| Infected Computers: | 243 |
| First Seen: | December 31, 2025 |
| Last Seen: | July 30, 2026 |
| OS(es) Affected: | Windows |
The detection of Adware.MSIL.BrowserAssistant.D on your system indicates the presence of a potentially unwanted program that may be causing disruptions to your browsing experience and potentially compromising your system's security. It is essential to understand the nature of this threat and take immediate action to remove it from your system to prevent further issues.
Table of Contents
What Is Adware.MSIL.BrowserAssistant.D?
Adware.MSIL.BrowserAssistant.D is a type of adware program designed to display unwanted advertisements on infected systems, often in the form of pop-ups, banners, or sponsored content. The primary goal of adware is to generate revenue for its creators by forcing users to view advertisements, which can be intrusive and disrupt the user experience. Adware programs like Adware.MSIL.BrowserAssistant.D can also collect user data, such as browsing history and search queries, to deliver targeted advertisements.
How Adware.MSIL.BrowserAssistant.D Operates
Adware.MSIL.BrowserAssistant.D operates by infiltrating a system through various means, such as bundled software downloads, infected email attachments, or exploited vulnerabilities. Once installed, the adware program can modify system settings, registry entries, and browser configurations to display unwanted advertisements. It may also communicate with remote servers to receive updates, report user activity, or download additional malware components. The adware's ability to collect user data and display targeted advertisements can lead to a range of issues, including slowed system performance, increased risk of malware infections, and compromised user privacy.
Symptoms of Infection
Common symptoms of Adware.MSIL.BrowserAssistant.D infection include an increase in unwanted advertisements, such as pop-ups, banners, or sponsored content, while browsing the internet. You may also notice slowed system performance, unexpected browser crashes, or changes to your browser's homepage or search engine. Additionally, you may observe suspicious programs or toolbars installed on your system without your knowledge or consent. If you are experiencing any of these symptoms, it is crucial to take immediate action to remove the adware from your system.
How to Remove Adware.MSIL.BrowserAssistant.D
- Boot your system in Safe Mode with Networking to prevent the adware from loading and to ensure a stable environment for removal.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all components of the adware.
- Uninstall any suspicious programs or toolbars that may be related to the adware infection.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any changes made by the adware.
- Reboot your system and perform a follow-up scan to ensure that all components of the adware have been removed.
Conclusion
Removing Adware.MSIL.BrowserAssistant.D from your system is crucial to preventing further disruptions to your browsing experience and protecting your system's security. By following the steps outlined above, you can effectively remove the adware and restore your system to a safe and stable state. It is essential to remain vigilant and take proactive measures to prevent future malware infections, such as keeping your operating system and software up to date, avoiding suspicious downloads, and using reputable anti-malware tools to protect your system. By taking these steps, you can ensure a safe and secure computing experience.
Analysis Report
General information
| Family Name: | Adware.MSIL.BrowserAssistant.D |
|---|---|
| Signature status: | Root Not Trusted |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
ea89a051262d83553c5a6cc49dd2414b
SHA1:
f2441855d2cc97978971f0af7932b5572960ebdc
SHA256:
011ACDD53F6198883460AC18FF748A73EC9463D00D85B684EE33011D63591EE1
File Size:
481.35 KB, 481352 bytes
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|
MD5:
f7203ddd9e51799347cdb0cc0674e479
SHA1:
1ba1117fbfb84a111e318cadb914a7df07cc8ff8
SHA256:
F6D84EA74F90BCEB80915F314048C778EBCB9524FF9C64CE0D825FF61E0CDE88
File Size:
481.35 KB, 481352 bytes
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MD5:
04ee38aa7fd3712c6e281b59619bc7cc
SHA1:
74cac80cbe9cf584cfdba7cbbdd69e43b96fd597
SHA256:
8F0DF01B63699603133BE0DD37C79839BBFC7B43D01070DA4EA3F442A5A2E94E
File Size:
449.61 KB, 449608 bytes
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MD5:
0077f23e425dfc73f600a44d5a9de4e8
SHA1:
eb1f14cce1f86aae720747ee5f05789cccaafa4a
SHA256:
CFF720F4CB770352C4BACDD3E9378FE2B446248BBC6C5C314DF145CC23AE6D30
File Size:
478.79 KB, 478792 bytes
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MD5:
972c6069950ce6080a7a283ee3c3bcbe
SHA1:
53ef1d9e16292421818dd307ab43bb59dca3470e
SHA256:
90DA67C0B71B2739099299917CFCC62E5368AE704A4DCCBA062EC58A46039A41
File Size:
496.20 KB, 496200 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- 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)
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 |
|---|---|
| Assembly Version |
|
| Comments | OneStartBrowser |
| Company Name | OneStart.ai |
| File Description | OneStartBrowser |
| File Version |
|
| Internal Name | OneStart.exe |
| Legal Copyright | Copyright © OneStart.ai 2025 |
| Original Filename | OneStart.exe |
| Product Name | OneStartBrowser |
| Product Version |
|
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 |
|---|---|---|
| Onestart Technologies LLC | SSL.com EV Root Certification Authority RSA R2 | Root Not Trusted |
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: | 145 |
|---|---|
| Potentially Malicious Blocks: | 69 |
| Whitelisted Blocks: | 76 |
| 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.- MSIL.BrowserAssistant.D
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\software\wow6432node\microsoft\tracing::enableconsoletracing | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasapi32::enablefiletracing | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasapi32::enableautofiletracing | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasapi32::enableconsoletracing | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasapi32::filetracingmask | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasapi32::consoletracingmask | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasapi32::maxfilesize | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasapi32::filedirectory | %windir%\tracing | RegNtPreCreateKey |
| HKLM\software\wow6432node\microsoft\tracing\rasmancs::enablefiletracing | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasmancs::enableautofiletracing | RegNtPreCreateKey |
Show More
| HKLM\software\wow6432node\microsoft\tracing\rasmancs::enableconsoletracing | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasmancs::filetracingmask | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasmancs::consoletracingmask | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\tracing\rasmancs::maxfilesize | RegNtPreCreateKey | |
| HKLM\software\wow6432node\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 |
|---|---|
| User Data Access |
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| Encryption Used |
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| Anti Debug |
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| Network Info Queried |
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| Other Suspicious |
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| Network Winsock2 |
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| Network Winsock |
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| Network Winhttp |
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