Worm.Luder.A
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: | 50 % (Medium) |
| Infected Computers: | 798 |
| First Seen: | December 15, 2012 |
| Last Seen: | February 15, 2026 |
| OS(es) Affected: | Windows |
The detection of Worm.Luder.A on your system indicates a potential security threat that requires immediate attention. Worms are a type of malware that can spread from system to system, causing damage and compromising security. In this report, we will provide an overview of Worm.Luder.A, its operating methods, symptoms of infection, and steps to remove it from your system.
Table of Contents
What Is Worm.Luder.A?
Worm.Luder.A is a type of worm that can infect a system and potentially cause harm. Worms are self-replicating malware that can spread through various means, including exploiting vulnerabilities, using social engineering tactics, or through infected software downloads. The name Worm.Luder.A suggests that it is a type of worm, but the specific characteristics and behaviors of this malware are not well-documented.
How Worm.Luder.A Operates
Worms like Worm.Luder.A typically operate by exploiting vulnerabilities in a system or application, allowing them to gain unauthorized access and execute malicious code. Once inside, the worm can spread to other parts of the system, potentially causing damage, stealing sensitive information, or disrupting normal system operation. Worms can also use social engineering tactics to trick users into executing malicious code or downloading infected software.
The exact methods used by Worm.Luder.A are not known, but it is likely that it uses a combination of these tactics to infect and spread. It is also possible that Worm.Luder.A uses advanced techniques, such as code obfuscation or anti-debugging methods, to evade detection and removal.
Symptoms of Infection
Systems infected with Worm.Luder.A may exhibit a range of symptoms, including slow system performance, unexpected crashes or freezes, and unusual network activity. Users may also notice that their system is behaving erratically, such as displaying unusual error messages or warnings. In some cases, the worm may also attempt to communicate with its command and control server, potentially leading to further malicious activity.
- Slow system performance
- Unexpected crashes or freezes
- Unusual network activity
- Erratic system behavior
- Unusual error messages or warnings
How to Remove Worm.Luder.A
- Boot your system in Safe Mode with Networking to prevent the worm from loading and to allow for easier removal.
- Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system and detect any malicious code.
- Uninstall any suspicious programs or applications that may be related to the worm.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any potentially malicious extensions or add-ons.
- Reboot your system and perform a follow-up scan to ensure that the worm has been completely removed.
Conclusion
The detection of Worm.Luder.A on your system is a serious security issue that requires immediate attention. By following the steps outlined in this report, you can help to remove the worm and prevent further damage. It is also important to take steps to prevent future infections, such as keeping your operating system and applications up to date, using strong antivirus software, and being cautious when downloading software or clicking on links from unknown sources.
Analysis Report
General information
| Family Name: | Worm.Luder.A |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
6ac1656262e0f2bcc17863a5b3caaf91
SHA1:
d0d10f850f236eac044153225f83d1bac0767ac9
SHA256:
43849B634B0F8C6693262419D49DA96466603FD70A9D7A9CA7FB3A64294D454D
File Size:
613.01 KB, 613012 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 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
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- 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.
File Traits
- big overlay
- No Version Info
- 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: | 29 |
|---|---|
| Potentially Malicious Blocks: | 26 |
| Whitelisted Blocks: | 3 |
| 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.- Luder.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 |
| c:\users\user\appdata\local\temp\eidolon.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\usbservers32.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\downloads\d0d10f850f236eac044153225f83d1bac0767ac9_0000613012 | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
| c:\users\user\downloads\d0d10f850f236eac044153225f83d1bac0767ac9_0000613012 | Synchronize,Write Attributes |
| c:\windows\syswow64\shell32.dll | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windows\temp\server32history.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windows\temp\tttbrozzz.bat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windows\temp\tttdelzzz.bat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
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\conhost.exe | ㌎쌓⢯ǜ | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | $# ( xy kP~ �ރ ���] ��^ ۴� }� � Vs} kP~ ��1 � �� ��� d B F e �k ��1 < �� h �n� } e�� e�� | RegNtPreCreateKey |
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| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 娆쌚⢯ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 吩쎖⢯ǜ | 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 |
|---|---|
| Process Manipulation Evasion |
|
| Process Shell Execute |
|
| Syscall Use |
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61 additional items are not displayed above. |
| Anti Debug |
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| User Data Access |
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| Process Terminate |
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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 C:\Users\Ykkcbjnc\AppData\Local\Temp\eidolon.exe
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open C:\WINDOWS\temp\tttdelzzz.bat
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open C:\WINDOWS\temp\tttbrozzz.bat
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WriteConsole: The batch file c
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WriteConsole: 1 file(s
|
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WriteConsole: '"c:\users\user\
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WriteConsole: file.
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C:\Users\Ykkcbjnc\AppData\Local\Temp\usbservers32.exe "C:\Users\Ykkcbjnc\AppData\Local\Temp\USBServers32.exe"
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C:\WINDOWS\system32\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\windows\currentVersion\run /v USBServers32 /t REG_SZ /d "C:\Users\Ykkcbjnc\AppData\Local\Temp\usbservers32.exe" /f
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WriteConsole: The batch file c
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