Trojan.LockScreen.C
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: | 80 % (High) |
| Infected Computers: | 31 |
| First Seen: | July 21, 2023 |
| Last Seen: | November 28, 2025 |
| OS(es) Affected: | Windows |
The detection of Trojan.LockScreen.C on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the security and integrity of your computer, and it's essential to understand its nature and take steps to remove it.
Table of Contents
What Is Trojan.LockScreen.C?
Trojan.LockScreen.C is a type of Trojan horse malware that can lock your computer screen, denying you access to your system and data. Trojans are malicious programs that disguise themselves as legitimate software, but in reality, they are designed to cause harm or provide unauthorized access to your system. The ".LockScreen.C" part of the name suggests that this specific variant may be designed to lock the screen of the infected computer.
How Trojan.LockScreen.C Operates
Trojan.LockScreen.C, like other Trojans, operates by exploiting vulnerabilities in your system or by tricking you into installing it. Once installed, it can perform a variety of malicious actions, including locking your screen, stealing sensitive information, or installing additional malware. The exact mechanisms of operation can vary, but the end result is always harmful to your system and your data.
Trojans often rely on social engineering tactics to spread, such as phishing emails, infected software downloads, or compromised websites. They can also exploit weaknesses in operating systems or applications to gain unauthorized access.
Symptoms of Infection
Identifying a Trojan.LockScreen.C infection can be challenging because it may not always exhibit obvious symptoms. However, some common signs of infection include a locked computer screen, slow system performance, unexpected pop-ups or advertisements, and unfamiliar programs or icons on your desktop. If you notice any of these symptoms, it's crucial to take immediate action to protect your system and data.
How to Remove Trojan.LockScreen.C
- Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow for internet access. This will make it easier to download and install removal tools.
- Download and run a full scan with a reputable anti-malware tool, such as SpyHunter, to detect and remove all instances of the malware. Ensure the tool is updated with the latest definitions to improve the chances of successful removal.
- Uninstall any suspicious programs that you don't recognize or that were installed around the time the malware was detected. Be cautious and only remove programs you are certain are malicious or unnecessary.
- Reset your web browsers, such as Chrome, Firefox, or Edge, to their default settings to remove any malicious extensions or settings that the malware might have altered.
- Reboot your computer and run another full scan with your anti-malware tool to ensure that all remnants of the malware have been removed. This step is crucial to confirm that your system is clean.
Conclusion
Removing Trojan.LockScreen.C requires careful and immediate action to prevent further damage to your system and data. By following the steps outlined above and maintaining good security practices, such as keeping your operating system and software up to date, using strong antivirus software, and being cautious with emails and downloads, you can protect your computer from similar threats in the future. Remember, prevention and vigilance are key to maintaining the security and integrity of your digital environment.
Analysis Report
General information
| Family Name: | Trojan.LockScreen.C |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
ff4b6e0cbfbccd8827a87c20a11d30a3
SHA1:
fdea6bb684ea16e20a9d42edc873c3d62f254bc8
SHA256:
167B1405976139D894C4E59A283B46F078B26B3E910DD4993A5EA8242D1E5EDD
File Size:
2.65 MB, 2647552 bytes
|
|
MD5:
936d9287e758c773a8cfd29885f19f12
SHA1:
29703e5d5c88dc98db20df784e8710774aebcfb8
SHA256:
2B271AC534A4C93155E57FB0D4D143CE5F15BE7BD1CEAE3FA4EAC9EC36DFE2FF
File Size:
2.65 MB, 2647552 bytes
|
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 security information
- File has TLS 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
- HighEntropy
- No Version Info
- ntdll
- 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: | 3,947 |
|---|---|
| Potentially Malicious Blocks: | 194 |
| Whitelisted Blocks: | 3,753 |
| 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.- Banker.RDA
- LockScreen.C
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\harddisk0\dr0 | Generic Read,Generic Execute,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 786496 |
| c:\mbr.bin | Generic Read,Generic Execute,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 786496 |
| c:\users\user\downloads\time.ini | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\downloads\time2.ini | 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\policies\microsoft\windows\system::disablecmd | RegNtPreCreateKey | |
| HKLM\software\microsoft\windows\currentversion\policies\system::enablelua | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\windows\currentversion\runonce::java | c:\users\user\downloads\fdea6bb684ea16e20a9d42edc873c3d62f254bc8_0002647552 | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\image file execution options\explorer.exe::debugger | c:\users\user\downloads\fdea6bb684ea16e20a9d42edc873c3d62f254bc8_0002647552 | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\image file execution options\taskmgr.exe::debugger | c:\users\user\downloads\fdea6bb684ea16e20a9d42edc873c3d62f254bc8_0002647552 | RegNtPreCreateKey |
| HKCU\software\microsoft\windows\currentversion\policies\uninstall::noaddremoveprograms | RegNtPreCreateKey | |
| HKLM\software\microsoft\windows\currentversion\policies\system::hidefastuserswitching | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer\advanced::noclose | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\system::disablelockworkstation | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\system::disablechangepassword | RegNtPreCreateKey |
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| HKCU\software\microsoft\windows\currentversion\policies\explorer::nochangestartmenu | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nocontrolpanel | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nonetworkconnections | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::norecentdocsmenu | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nowinkeys | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nofavoritesmenu | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nostartmenumoreprograms | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nostartmenupinnedlist | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::noclose | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nocommongroups | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nocustomizewebview | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::noprintertabs | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nodesktop | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nofind | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nofilemenu | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nofolderoptions | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::norun | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\policies\explorer::nologoff | RegNtPreCreateKey | |
| HKLM\software\wow6432node\microsoft\windows\currentversion\runonce::java | c:\users\user\downloads\29703e5d5c88dc98db20df784e8710774aebcfb8_0002647552 | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\image file execution options\explorer.exe::debugger | c:\users\user\downloads\29703e5d5c88dc98db20df784e8710774aebcfb8_0002647552 | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\image file execution options\taskmgr.exe::debugger | c:\users\user\downloads\29703e5d5c88dc98db20df784e8710774aebcfb8_0002647552 | 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 |
|
| Other Suspicious |
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| Process Terminate |
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