Worm.Autorun.F
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: | 90 % (High) |
| Infected Computers: | 39 |
| First Seen: | July 24, 2009 |
| Last Seen: | February 10, 2026 |
| OS(es) Affected: | Windows |
The detection of Worm.Autorun.F on your system indicates a potential security threat that requires immediate attention. This worm, as indicated by its name, is a type of malware designed to replicate itself and spread to other computers. Understanding the nature of this threat and how it operates is crucial in taking the necessary steps to remove it and protect your system from future infections.
Table of Contents
What Is Worm.Autorun.F?
Worm.Autorun.F is identified as a worm, which is a category of malware that can spread from system to system without the need for human interaction. Unlike viruses, which require a host program to replicate, worms are self-contained and can propagate independently. The name "Worm.Autorun.F" suggests it may utilize the autorun feature to spread, potentially through removable drives or network shares, though the specifics of its operation can vary.
How Worm.Autorun.F Operates
Worms like Worm.Autorun.F typically exploit vulnerabilities in operating systems or applications to infect a computer. Once inside, they can perform a variety of malicious activities, including data theft, installing additional malware, or using the infected computer as part of a botnet for distributed attacks. The worm may also attempt to spread to other devices connected to the infected system, either through the network or by waiting for opportunities to infect removable media like USB drives.
Symptoms of Infection
The symptoms of a Worm.Autorun.F infection can vary, but common indicators include unusual system behavior, such as slow performance, frequent crashes, or the appearance of unfamiliar programs or files. You might also notice that your system's autorun settings have been altered, or you may see strange network activity. In some cases, the infection might not display obvious symptoms, making it difficult to detect without proper scanning tools.
How to Remove Worm.Autorun.F
- Boot your computer in Safe Mode with Networking. This will help prevent the worm 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 your antivirus software is up to date before scanning to increase the chances of detecting and removing the worm.
- Uninstall any suspicious programs that you do not recognize or that were installed around the time you suspect the infection occurred.
- Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings. This can help remove any malicious extensions or settings changes made by the worm.
- Reboot your computer and perform another full scan with your anti-malware tool to ensure that the worm has been completely removed. Repeat this process until no more threats are detected.
Conclusion
Removing Worm.Autorun.F requires a combination of understanding its operation, recognizing the symptoms of infection, and taking deliberate steps to eradicate it from your system. By following the removal guide outlined above and maintaining vigilant security practices, such as regularly updating your operating system and applications, using strong antivirus software, and being cautious with email attachments and downloadable files, you can protect your system from this and other malware threats. Remember, prevention and swift action are key to minimizing the impact of a malware infection.
Aliases
15 security vendors flagged this file as malicious.
| Antivirus Vendor | Detection |
|---|---|
| TrendMicro | PE_ABI.A |
| Sophos | W32/VB-DYZ |
| Prevx1 | Worm |
| Panda | Adware/AccesMembre |
| NOD32 | Win32/VB.NPF |
| Microsoft | Worm:Win32/Autorun.BN |
| McAfee | W32/Autorun.worm.h |
| Ikarus | Trojan.Autorun.UA |
| F-Secure | IM-Worm.Win32.VB.gd |
| eWido | Worm.VB.gd |
| eTrust-Vet | Win32/SillyAutorun.HX |
| Comodo | Worm.Win32.VB.gd |
| ClamAV | Worm.VB-734 |
| CAT-QuickHeal | I-Worm.VB.gd |
| BitDefender | Win32.Worm.VB.NUT |
Analysis Report
General information
| Family Name: | Worm.Autorun.F |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
b9bec5eeb95deff82249cc410baaddb1
SHA1:
c843bc936d7de19e42b67892209bc0705c60c92e
SHA256:
9F74DD4E355F702A7DD837661AFEF4C8DA312479F20434AF2893AA7D29B16681
File Size:
17.92 KB, 17920 bytes
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MD5:
36823b3e3f906913bbf5750b3467f998
SHA1:
3e9b7213ad8de180f968aa7bbe32c86615af2463
SHA256:
C3B83DA7B8131631FC99CBBBE99EE8339E81031841EE85A3F0C6A7BA87361053
File Size:
43.01 KB, 43007 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 security information
- File has exports table
- 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)
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- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Traits
- dll
- WriteProcessMemory
- 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: | 200 |
|---|---|
| Potentially Malicious Blocks: | 4 |
| Whitelisted Blocks: | 195 |
| 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.- Autorun.KA
- KillMBR.XE
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 |
Show More
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| Process Shell Execute |
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| Anti Debug |
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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.
C:\WINDOWS\SysWOW64\rundll32.exe C:\WINDOWS\system32\rundll32.exe c:\users\user\downloads\c843bc936d7de19e42b67892209bc0705c60c92e_0000017920.,LiQMAxHB
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C:\WINDOWS\SysWOW64\rundll32.exe C:\WINDOWS\system32\rundll32.exe c:\users\user\downloads\3e9b7213ad8de180f968aa7bbe32c86615af2463_0000043007.,LiQMAxHB
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