Trojan.Autorun.S
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: | 18,349 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 8 |
| First Seen: | September 20, 2021 |
| Last Seen: | June 26, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Autorun.S on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the security of your computer, allowing unauthorized access and potentially leading to further malicious activities. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future infections.
Table of Contents
What Is Trojan.Autorun.S?
Trojan.Autorun.S is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate programs. The name "Trojan.Autorun.S" suggests that it may be related to the autorun feature in Windows, which allows programs to run automatically when a device is connected or a disk is inserted. However, without more specific information, it's difficult to determine the exact nature and behavior of this particular threat.
How Trojan.Autorun.S Operates
Trojan horses like Trojan.Autorun.S typically operate by exploiting vulnerabilities in software or tricking users into installing them. Once installed, they can perform a variety of malicious actions, such as stealing sensitive information, installing additional malware, or providing unauthorized access to the infected system. They may also attempt to spread to other systems through various means, including removable drives, network connections, or email attachments.
It's worth noting that the exact behavior of Trojan.Autorun.S may vary, and its primary goal may be to serve as a gateway for other malicious activities. The lack of specific information about this threat makes it challenging to provide detailed analysis, but it's clear that prompt removal is necessary to prevent potential harm.
Symptoms of Infection
Systems infected with Trojan.Autorun.S may exhibit a range of symptoms, including unusual system behavior, slow performance, or unexpected pop-ups and alerts. Users may also notice that their system settings have been changed without their consent or that unfamiliar programs are running in the background. However, some infections may not display any noticeable symptoms, making regular system scans and monitoring essential for detection.
How to Remove Trojan.Autorun.S
- Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow for easier removal.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all instances of the malware.
- Uninstall any suspicious programs or applications that may be related to the infection.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or settings.
- Reboot your system and perform another full scan to ensure that the malware has been completely removed.
It's crucial to follow these steps carefully and use reputable tools to avoid further compromising your system. If you're unsure about any part of the removal process, consider seeking assistance from a professional.
Conclusion
The detection of Trojan.Autorun.S is a serious issue that requires prompt and careful action to remove the threat and prevent future infections. By understanding the nature of this malware and following the removal steps outlined above, you can help protect your system and sensitive information from potential harm. Remember to always be cautious when installing software, opening email attachments, or inserting removable devices, and keep your system and security software up to date to minimize the risk of infection.
Analysis Report
General information
| Family Name: | Trojan.Autorun.S |
|---|---|
| Signature status: | Hash Mismatch |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
2141a7fb72cc3dc42e8a87855e7d67bf
SHA1:
bcb4dd1814b65ac4803c0bca4e4c471f07b0e81b
SHA256:
A085B342D3E8E17C194E7E546C2D3A764FEFB961FB79A266AE382399CDA845C9
File Size:
173.43 KB, 173432 bytes
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MD5:
d79e93ffaadc4ce22a145d22e47595cb
SHA1:
a4ba5989a45366d670cb2565908f4487debc0ab8
SHA256:
6B09F78B49BBFE0635A140E5ADA87C3CBC39A71DF5B7C78CB8D73673E0B50C77
File Size:
169.41 KB, 169408 bytes
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MD5:
245fcdc6c2752206e4675b652886131a
SHA1:
3f7f335bef61349cd6fa4f891605d6acbcc2b327
SHA256:
97F191DD31123A67A90C49121B4B7AB39F71A13AAB18FB37313820DFC212C54F
File Size:
181.70 KB, 181696 bytes
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MD5:
4e5570aeda4c9685aa5980cd9ccc12ac
SHA1:
dd7f5a1564d507f4baebaf7c7553ff338d843d37
SHA256:
2F4F982158AF12411E9BD853674A60BBABD2FE88AEB19C503AC071267BDEA5A3
File Size:
177.98 KB, 177983 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have relocations 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)
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 | Adobe Systems Incorporated |
| File Description | Eula display |
| File Version |
|
| Internal Name | Eula.exe |
| Legal Copyright |
|
| Original Filename | Eula.exe |
| Product Name | EULA |
| 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 |
|---|---|---|
| Adobe Systems, Incorporated | VeriSign Class 3 Code Signing 2004 CA | Hash Mismatch |
File Traits
- 2+ executable sections
- big overlay
- HighEntropy
- SusSec
- 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: | 262 |
|---|---|
| Potentially Malicious Blocks: | 23 |
| Whitelisted Blocks: | 223 |
| Unknown Blocks: | 16 |
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.- Autorun.S
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:\program files\common files\system\symsrv.dll | 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\explorer\advanced::hidden | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\security center::antivirusoverride | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\security center::antivirusdisablenotify | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\security center::firewalldisablenotify | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\security center::firewalloverride | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\security center::updatesdisablenotify | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\security center::uacdisablenotify | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\windows nt\currentversion\windows::appinit_dlls | C:\PROGRA~1\COMMON~1\System\symsrv.dll | RegNtPreCreateKey |
| HKLM\software\wow6432node\microsoft\windows nt\currentversion\windows::loadappinit_dlls | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\windows nt\currentversion\windows::requiresignedappinit_dlls | RegNtPreCreateKey |
