Backdoor.MSIL.Orcus.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: | 60 % (Medium) |
| Infected Computers: | 1 |
| First Seen: | February 19, 2024 |
| Last Seen: | September 7, 2025 |
| OS(es) Affected: | Windows |
The detection of Backdoor.MSIL.Orcus.C on your system indicates a potential security threat that requires immediate attention. This backdoor threat can compromise the security and integrity of your computer, allowing unauthorized access and potentially leading to further malware infections, data theft, or other malicious activities. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future occurrences.
Table of Contents
What Is Backdoor.MSIL.Orcus.C?
Backdoor.MSIL.Orcus.C is a type of backdoor malware that can provide unauthorized access to your computer, allowing attackers to remotely control your system, steal sensitive information, or use your computer as a botnet to conduct malicious activities. The name suggests it is written in MSIL (Microsoft Intermediate Language), which is a platform-agnostic intermediate representation of the .NET Common Intermediate Language (CIL). This implies that the malware is designed to be versatile and potentially adaptable across different environments.
How Backdoor.MSIL.Orcus.C Operates
Backdoor malware like Backdoor.MSIL.Orcus.C typically operates by creating a covert communication channel between your computer and a command and control (C2) server controlled by the attackers. This channel allows the attackers to send commands to your computer and receive stolen data or other information. The malware may use various techniques to evade detection, including code obfuscation, anti-debugging methods, and exploiting vulnerabilities in software or operating systems. Understanding how backdoor malware operates is crucial for developing effective strategies for detection and removal.
Symptoms of Infection
The symptoms of a Backdoor.MSIL.Orcus.C infection can be subtle and may not always be immediately apparent. However, common indicators of a backdoor infection include unusual network activity, slow system performance, unexpected changes to system settings, and the presence of unfamiliar programs or files. In some cases, the malware may trigger alerts from security software or cause system crashes. It's important to monitor your system's behavior closely and investigate any suspicious activity promptly.
- Unexplained changes in system settings or files
- Unexpected network activity, especially during periods of inactivity
- Performance issues, such as slow startup times or application launches
- Appearance of unfamiliar programs or icons
How to Remove Backdoor.MSIL.Orcus.C
- Enter Safe Mode with Networking to limit the malware's ability to interfere with the removal process. This mode allows you to access the internet and use security tools while minimizing system activity.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all traces of the malware. Ensure the tool is updated with the latest definitions for the best results.
- Uninstall any suspicious programs or applications that were installed around the time of the suspected infection. Be cautious and only remove programs you are certain are malicious or unnecessary.
- Reset your web browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings that the malware might have altered. This step is crucial for preventing the malware from using your browsers for malicious activities.
- Reboot your computer and perform another full scan to ensure all components of the malware have been removed. This step is essential for verifying the effectiveness of the removal process.
Conclusion
Removing Backdoor.MSIL.Orcus.C from your system requires a combination of the right tools, knowledge, and caution. By understanding the nature of backdoor threats and following a systematic approach to removal, you can protect your computer and personal data from these malicious attacks. It's also important to adopt preventive measures, such as keeping your operating system and software up to date, using strong antivirus protection, and practicing safe browsing habits, to minimize the risk of future infections. Remember, vigilance and proactive security practices are key to maintaining a secure computing environment.
Analysis Report
General information
| Family Name: | Backdoor.MSIL.Orcus.C |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
ff6f83ef468d97608c97ea6248670883
SHA1:
2ce2e05b4ec645c5b0a5be20f2b753e1a9492ac6
SHA256:
5E315F99943459975E2B5FF04D64B838EFBFCF9CE15A7FC243551AFDEFB4E540
File Size:
146.94 KB, 146944 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have security information
- 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 |
|---|---|
| App Host | .NET Runtime Bootstrapper v2.5.2 (GUI) |
| Assembly Version | 5.3.3.0 |
| Company Name | ElectronicObserver |
| File Description | ElectronicObserver |
| File Version | 5.3.3.0 |
| Internal Name | ElectronicObserver.exe |
| Legal Copyright | Copyright © 2014 Andante |
| Original Filename | ElectronicObserver.exe |
| Product Name | ElectronicObserver |
| Product Version | 5.3.3.0+344f9f4c838f333578611d622a2c23e021aa0d1c |
File Traits
- .NET
- ntdll
- 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: | 460 |
|---|---|
| Potentially Malicious Blocks: | 154 |
| Whitelisted Blocks: | 306 |
| 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.Orcus.C
- MSIL.Orcus.D
- MSIL.Orcus.F
- MSIL.Orcus.J
- Orcus.J
Show More
- Orcus.L
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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| User Data Access |
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| Anti Debug |
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