Trojan.Stealer.OB
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: | 11,459 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 1,121 |
| First Seen: | October 7, 2023 |
| Last Seen: | June 30, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Stealer.OB on your system indicates a potential security threat. This report provides general guidance on understanding and addressing the issue. It's essential to approach the situation with caution and follow best practices to minimize risks.
Table of Contents
What Is Trojan.Stealer.OB?
Trojan.Stealer.OB is identified as a Trojan-type threat, which typically refers to a broad category of malware designed to deceive users into installing it on their systems. The name itself does not directly imply a specific malware family but indicates its potential capabilities, such as stealing sensitive information. Trojans are known for their versatility and can be used for various malicious purposes, including data theft, spyware, and as a backdoor for other malware.
How Trojan.Stealer.OB Operates
While specific details about Trojan.Stealer.OB's operation are not available, Trojans generally work by disguising themselves as legitimate software. Once installed, they can operate in various ways, such as monitoring and logging keystrokes, capturing screenshots, or even granting remote access to the attacker. The primary goal of most Trojans is to remain undetected, allowing them to carry out their malicious activities without interruption.
Symptoms of Infection
Symptoms of a Trojan infection can vary widely, depending on the specific goals of the malware. Common indicators include unexpected changes to system settings, appearance of unwanted programs or toolbars, slow system performance, frequent crashes, or pop-ups and other unwanted advertisements. Additionally, if the Trojan is designed for data theft, you might notice suspicious transactions or unauthorized access to personal accounts.
- Unexplained system crashes or freezes
- New, unfamiliar programs or icons on the desktop
- Changes to browser settings or homepage
- Increased pop-up advertisements
- Suspicious network activity
How to Remove Trojan.Stealer.OB
- 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 other necessary tools while disabling most non-essential services.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. Ensure the tool is updated with the latest definitions to improve detection capabilities.
- Uninstall suspicious programs 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 browsers (Chrome, Firefox, Edge, etc.) to their default settings. This can help remove any malicious extensions or settings changes made by the Trojan.
- After completing the above steps, reboot your system and perform another scan to ensure the malware has been fully removed.
Conclusion
Removing Trojan.Stealer.OB requires careful attention to detail and adherence to best practices for malware removal. By following the steps outlined above and maintaining vigilance in your online activities, you can significantly reduce the risk of reinfection. It's also crucial to keep your operating system, software, and security tools updated to protect against the latest threats. Remember, prevention is key, so consider implementing additional security measures such as a firewall and ensuring you only download software from trusted sources.
Analysis Report
General information
| Family Name: | Trojan.Stealer.OB |
|---|---|
| Signature status: | Hash Mismatch |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
7d282f3fa1c790346d3863067d850a35
SHA1:
9235af852c9f233bea4be778454461005ca2bafc
SHA256:
ECF41EF3BE08EA2694C74E3AEB69909C4AC3A530961575E24825BC35E96DC614
File Size:
240.96 KB, 240955 bytes
|
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MD5:
82fce4797cac931a2cb79e9ee556c673
SHA1:
d74c935d17f2790420a49270dbc45fe4d35d7e13
SHA256:
7AAA53F8C035331AC3413ED96142C179B8DAE511B57A5BF443DF973E7661A181
File Size:
621.62 KB, 621624 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File doesn't have resources
- File doesn't have security information
- File has exports table
- File has TLS information
- File is 64-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
- File is either console or GUI application
- File is Native application (NOT .NET application)
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- 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)
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 | Microsoft Corporation |
| File Description | Microsoft Antimalware Utility Library |
| File Version | 1.1.16330.1 |
| Internal Name | MpGear |
| Legal Copyright | © Microsoft Corporation. All rights reserved. |
| Original Filename | MpGear.dll |
| Product Name | Microsoft Malware Protection |
| Product Version | 1.1.16330.1 |
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 |
|---|---|---|
| Microsoft Corporation | Microsoft Code Signing PCA | Hash Mismatch |
| Microsoft Corporation | Microsoft Code Signing PCA 2010 | Hash Mismatch |
File Traits
- dll
- ntdll
- x64
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: | 2,447 |
|---|---|
| Potentially Malicious Blocks: | 47 |
| Whitelisted Blocks: | 2,400 |
| 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.- Stealer.OB
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 |
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