Sigma.A Ransomware
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: | 22,748 |
| Threat Level: | 100 % (High) |
| Infected Computers: | 2 |
| First Seen: | July 8, 2022 |
| Last Seen: | May 11, 2026 |
| OS(es) Affected: | Windows |
The detection of Sigma.A Ransomware on your system indicates a serious security threat that requires immediate attention. Ransomware is a type of malware that encrypts files on a victim's device, demanding a ransom in exchange for the decryption key. In this report, we will provide an overview of Sigma.A Ransomware, its operating methods, symptoms of infection, and steps to remove it from your system.
Table of Contents
What Is Sigma.A Ransomware?
Sigma.A Ransomware is a malware threat that falls under the category of ransomware. While the specifics of this particular threat are not detailed here, ransomware in general is designed to extort money from victims by encrypting their files and demanding payment in exchange for the decryption key. The name "Sigma.A Ransomware" itself does not directly indicate a known family of malware, but rather serves as an identifier for the detected threat.
How Sigma.A Ransomware Operates
Ransomware typically operates by infiltrating a system through various means, such as phishing emails, exploited vulnerabilities, or infected software downloads. Once inside, it begins to encrypt files, often targeting common file types such as documents, images, and videos. The encryption process renders these files inaccessible to the user, and a ransom demand is displayed, usually in the form of a pop-up window or a text file left on the desktop. The demand typically includes instructions on how to pay the ransom, usually in a cryptocurrency, in exchange for the decryption key.
Symptoms of Infection
Symptoms of a Sigma.A Ransomware infection can include the inability to access files, the presence of ransom demands, and significant slowdowns in system performance. Files may appear with unusual extensions or names, and attempts to open them will result in error messages. In some cases, the ransomware may also attempt to spread to other devices on the network, exacerbating the problem. It's crucial to act quickly upon noticing these symptoms to minimize the damage.
How to Remove Sigma.A Ransomware
- Enter Safe Mode with Networking to prevent the malware from spreading or interfering with the removal process. This can usually be done by restarting your computer and pressing the appropriate key (often F8) to access the boot options.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. This can help identify and remove the malware, as well as any other threats that may be present.
- Uninstall any suspicious programs that may have been installed without your knowledge. Be cautious and only remove programs that you are certain are malicious or unnecessary.
- Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings. This can help remove any malicious extensions or settings that the ransomware may have altered.
- Reboot your system and perform another full scan with your anti-malware tool to ensure that all remnants of the malware have been removed.
Conclusion
Removing Sigma.A Ransomware from your system requires careful and immediate action. By following the steps outlined above and maintaining vigilance against future threats, you can help protect your files and system from the devastating effects of ransomware. Remember, prevention is key, so always be cautious when opening emails or downloading software from the internet, and keep your operating system and security software up to date.
Analysis Report
General information
| Family Name: | Sigma.A Ransomware |
|---|---|
| Signature status: | Root Not Trusted |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
6cc32ac0b7f95a11bdf24366b9d66855
SHA1:
78a6d9a9e979209d41db81525097af130d340dca
SHA256:
6FFC8643731843E9F61E8BA93442E6E5AE13ECE9CB85773F70CD7C7F116D4126
File Size:
1.33 MB, 1326000 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- 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
- 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 |
|---|---|
| Company Name | adaware |
| File Description | Quick Launch |
| File Version | 6.2.0.4762 |
| Internal Name | installer.exe |
| Legal Copyright | Copyright © Adaware 2020 |
| Original Filename | installer.exe |
| Product Name | QuickLaunch |
| Product Version | 6.2.0.4762 |
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 |
|---|---|---|
| Lavasoft Software Canada Inc. | Entrust Root Certification Authority - G2 | Root Not Trusted |
File Traits
- HighEntropy
- Installer Manifest
- Installer Version
- 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: | 3,220 |
|---|---|
| Potentially Malicious Blocks: | 411 |
| Whitelisted Blocks: | 2,809 |
| 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.- Bitcoinminer.KBB
- Sigma.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 |
|---|---|
| c:\users\user\downloads\2026-02-24-05-18-43_installer_pid=7076.txt | Generic Write,Read Attributes |
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 |
|---|---|
| Anti Debug |
|
