Trojan.Small.D
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: | 7,557 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 1,140 |
| First Seen: | July 24, 2009 |
| Last Seen: | July 14, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Small.D 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.Small.D?
Trojan.Small.D is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate or harmless. The name "Trojan" refers to the malware's ability to deceive users into installing or executing it, often by masquerading as a useful program or file. The ".Small.D" designation suggests that this particular variant is relatively small in size and may be designed to evade detection by traditional antivirus software.
How Trojan.Small.D Operates
Once installed, Trojan.Small.D can operate in various ways, depending on its intended purpose. It may attempt to connect to a remote server to receive instructions or transmit stolen data, such as login credentials, credit card numbers, or sensitive personal information. It can also install additional malware, create backdoors for unauthorized access, or modify system settings to disable security features. The malware may also attempt to hide its presence by disguising itself as a system process or legitimate program.
Symptoms of Infection
Identifying a Trojan.Small.D infection can be challenging, as it may not exhibit obvious symptoms. However, some common signs of infection include slow system performance, frequent crashes, or unusual network activity. You may also notice unfamiliar programs or icons on your desktop, or receive unexpected pop-ups or alerts. In some cases, the malware may attempt to disable your antivirus software or prevent you from accessing certain websites or system features.
- Unexplained changes to system settings or configuration
- Appearance of unfamiliar programs or icons
- Slow system performance or frequent crashes
- Unusual network activity or unexpected pop-ups
How to Remove Trojan.Small.D
- Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow for internet access. This will help you download and install removal tools.
- Download and install a reputable anti-malware tool, such as SpyHunter, and perform a full scan of your system to detect and remove the malware.
- Uninstall any suspicious programs or applications that may be related to the malware. Be cautious when uninstalling programs, as some may be legitimate or required by your system.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or settings.
- Reboot your system and perform another full scan with your anti-malware tool to ensure that the malware has been completely removed.
Conclusion
Removing Trojan.Small.D from your system requires a combination of technical expertise and caution. By following the steps outlined above and using reputable anti-malware tools, you can help ensure the removal of this malicious software and prevent future infections. It's essential to remain vigilant and take proactive measures to protect your system, including keeping your operating system and software up-to-date, using strong antivirus software, and avoiding suspicious downloads or links.
Aliases
3 security vendors flagged this file as malicious.
| Antivirus Vendor | Detection |
|---|---|
| Sophos | Mal/Heuri-D |
| Panda | Suspicious file |
| F-Secure | Backdoor.Win32.Small.dmp |
Analysis Report
General information
| Family Name: | Trojan.Small.D |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
899776efe32524fa53266752ece53f3e
SHA1:
d9518160b5182d5558dd92ad5c2fef0b59e8a398
SHA256:
D95C422DF7DA6BE09F09578F9C9F3E5593C0B9CC71E7B271727C8E534ABE16AE
File Size:
69.71 KB, 69714 bytes
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MD5:
e3315eac4969ebd33dd8c40e43f73ff0
SHA1:
0dd2621e4808d6af686656e0b97b6ef929c42222
SHA256:
080222DCF80AAF64B7B58A0B1511B9914A15ADACCA663D6B2BA87FBE995C2595
File Size:
89.74 KB, 89739 bytes
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MD5:
d6b7f04a4f75b3361660771adba761fc
SHA1:
193d02b0f5357de5c08df60210ac471d44570b0a
SHA256:
116712EB507230E45BDFB98A595E728B6D86C912CE4F048931EED2AE52DEF611
File Size:
89.10 KB, 89101 bytes
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MD5:
8498a38e6fa8887355c813f6176c38dd
SHA1:
a8e792543157c0064bc50395b55ad8ea742c882f
SHA256:
0A004E4D355656E0BFBC156ACD0A91A546A6FADEA2769BBBF022879AB083F01A
File Size:
89.26 KB, 89257 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 resources
- File doesn't have security information
- File has been packed
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
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- 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.
File Traits
- 2+ executable sections
- No Version Info
- packed
- 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: | 170 |
|---|---|
| Potentially Malicious Blocks: | 127 |
| Whitelisted Blocks: | 43 |
| Unknown Blocks: | 0 |
Visual Map
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0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block
? - 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.- Small.D
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:\windows\ouwininit.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wbcal.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wbuxx.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wfsajo.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wfyoduu.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wgppfa.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wjyk.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wnwk.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wpblurq.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wrmhvxr.exe | Generic Write,Read Attributes |
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| c:\windows\syswow64\wvjtph.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\wwddnu.exe | Generic Write,Read Attributes |
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 | |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | �� xy * � /�� Y� d� kP~ � � �ރ �p- ��^ �o � eea Vs} E kP~ E ��1 B �� 7 � �� ﺃ e P e�� � "D ��1 T �� f e�� g � | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 㕳ǜ | RegNtPreCreateKey |
| HKLM\software\classes\typelib\{1ea4dbf0-3c3b-11cf-810c-00aa00389b71}\1.1\0\win32:: | C:\WINDOWS\SysWow64\Oleacc.dll | RegNtPreCreateKey |
| HKLM\software\classes\wow6432node\interface\{618736e0-3c3d-11cf-810c-00aa00389b71}\proxystubclsid32:: | {00020424-0000-0000-C000-000000000046} | RegNtPreCreateKey |
| HKLM\software\classes\wow6432node\interface\{618736e0-3c3d-11cf-810c-00aa00389b71}\typelib:: | {1EA4DBF0-3C3B-11CF-810C-00AA00389B71} | RegNtPreCreateKey |
| HKLM\software\classes\wow6432node\interface\{618736e0-3c3d-11cf-810c-00aa00389b71}\typelib::version | 1.1 | RegNtPreCreateKey |
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| HKLM\software\classes\interface\{618736e0-3c3d-11cf-810c-00aa00389b71}\proxystubclsid32:: | {00020424-0000-0000-C000-000000000046} | RegNtPreCreateKey |
| HKLM\software\classes\interface\{618736e0-3c3d-11cf-810c-00aa00389b71}\typelib:: | {1EA4DBF0-3C3B-11CF-810C-00AA00389B71} | RegNtPreCreateKey |
| HKLM\software\classes\interface\{618736e0-3c3d-11cf-810c-00aa00389b71}\typelib::version | 1.1 | RegNtPreCreateKey |
| HKLM\software\classes\wow6432node\interface\{03022430-abc4-11d0-bde2-00aa001a1953}\proxystubclsid32:: | {00020424-0000-0000-C000-000000000046} | RegNtPreCreateKey |
| HKLM\software\classes\wow6432node\interface\{03022430-abc4-11d0-bde2-00aa001a1953}\typelib:: | {1EA4DBF0-3C3B-11CF-810C-00AA00389B71} | RegNtPreCreateKey |
| HKLM\software\classes\wow6432node\interface\{03022430-abc4-11d0-bde2-00aa001a1953}\typelib::version | 1.1 | RegNtPreCreateKey |
| HKLM\software\classes\interface\{03022430-abc4-11d0-bde2-00aa001a1953}\proxystubclsid32:: | {00020424-0000-0000-C000-000000000046} | RegNtPreCreateKey |
| HKLM\software\classes\interface\{03022430-abc4-11d0-bde2-00aa001a1953}\typelib:: | {1EA4DBF0-3C3B-11CF-810C-00AA00389B71} | RegNtPreCreateKey |
| HKLM\software\classes\interface\{03022430-abc4-11d0-bde2-00aa001a1953}\typelib::version | 1.1 | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | m� xy * � /�� Y� d� � � �ރ �p ��^ �o � < Vs} kP~ ��1 ! �� 7 � �� ﺃ e e�� ��1 ( �� f e�� h �n� i U e�� r G | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | ฿ǜ | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | n� xy * � /�� Y� d� � � �ރ �p ��^ �o � = Vs} kP~ ��1 ! �� 7 � �� ﺃ e e�� ��1 ( �� f e�� h �n� i U e�� r G | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 홲༅ǜ | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | o� xy * � /�� Y� d� � � �ރ �p ��^ �o � > Vs} kP~ ��1 ! �� 7 � �� ﺃ e e�� ��1 ( �� f e�� h �n� i U e�� r G | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | p� xy * � /�� Y� d� � � �ރ �p ��^ �o � ? Vs} kP~ ��1 ! �� 7 � �� ﺃ e e�� ��1 ( �� f e�� h �n� i U e�� r G | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 喻ǜ | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | q� xy * � /�� Y� d� � � �ރ �p ��^ �o � @ Vs} kP~ ��1 ! �� 7 � �� ﺃ e e�� ��1 ( �� f e�� h �n� i U e�� r G | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | ᗸ၊ǜ | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | �� xy * � /�� Y� d� kP~ � � �ރ �p* ��^ �o � eeb Vs} E kP~ E ��1 B �� 7 � �� ﺃ e P e�� � "D ��1 X �� f e�� g � | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 줝֔ǜ | 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 |
|---|---|
| Anti Debug |
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| User Data Access |
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| Keyboard Access |
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| Network Wininet |
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| Process Manipulation Evasion |
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| Process Shell Execute |
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| Syscall Use |
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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.
C:\WINDOWS\system32\wbuxx.exe "C:\WINDOWS\system32\wbuxx.exe"
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Open C:\WINDOWS\system32\wbuxx
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C:\WINDOWS\system32\cmd.exe "C:\WINDOWS\system32\cmd.exe" /c del "c:\users\user\downloads\0dd2621e4808d6af686656e0b97b6ef929c42222_0000089739"
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Open C:\WINDOWS\system32\cmd.exe /c del "c:\users\user\downloads\0dd2621e4808d6af686656e0b97b6ef929c42222_0000089739"
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C:\WINDOWS\system32\wjyk.exe "C:\WINDOWS\system32\wjyk.exe"
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Open C:\WINDOWS\system32\wjyk
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C:\WINDOWS\system32\cmd.exe "C:\WINDOWS\system32\cmd.exe" /c del "c:\users\user\downloads\193d02b0f5357de5c08df60210ac471d44570b0a_0000089101"
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Open C:\WINDOWS\system32\cmd.exe /c del "c:\users\user\downloads\193d02b0f5357de5c08df60210ac471d44570b0a_0000089101"
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C:\WINDOWS\system32\wwddnu.exe "C:\WINDOWS\system32\wwddnu.exe"
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Open C:\WINDOWS\system32\wwddnu
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Open C:\WINDOWS\system32\cmd.exe /c del "C:\WINDOWS\system32\wjyk.exe"
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C:\WINDOWS\system32\wgppfa.exe "C:\WINDOWS\system32\wgppfa.exe"
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Open C:\WINDOWS\system32\wgppfa
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C:\WINDOWS\system32\cmd.exe "C:\WINDOWS\system32\cmd.exe" /c del "C:\WINDOWS\system32\wwddnu.exe"
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Open C:\WINDOWS\system32\cmd.exe /c del "C:\WINDOWS\system32\wwddnu.exe"
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WriteConsole: Could Not Find C
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C:\WINDOWS\system32\wrmhvxr.exe "C:\WINDOWS\system32\wrmhvxr.exe"
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Open C:\WINDOWS\system32\wrmhvxr
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Open C:\WINDOWS\system32\cmd.exe /c del "C:\WINDOWS\system32\wgppfa.exe"
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C:\WINDOWS\system32\wfyoduu.exe "C:\WINDOWS\system32\wfyoduu.exe"
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Open C:\WINDOWS\system32\wfyoduu
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C:\WINDOWS\system32\cmd.exe "C:\WINDOWS\system32\cmd.exe" /c del "C:\WINDOWS\system32\wrmhvxr.exe"
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Open C:\WINDOWS\system32\cmd.exe /c del "C:\WINDOWS\system32\wrmhvxr.exe"
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C:\WINDOWS\system32\wnwk.exe "C:\WINDOWS\system32\wnwk.exe"
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Open C:\WINDOWS\system32\wnwk
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C:\WINDOWS\system32\cmd.exe "C:\WINDOWS\system32\cmd.exe" /c del "C:\WINDOWS\system32\wfyoduu.exe"
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Open C:\WINDOWS\system32\cmd.exe /c del "C:\WINDOWS\system32\wfyoduu.exe"
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C:\WINDOWS\system32\wbcal.exe "C:\WINDOWS\system32\wbcal.exe"
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Open C:\WINDOWS\system32\wbcal
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C:\WINDOWS\system32\cmd.exe "C:\WINDOWS\system32\cmd.exe" /c del "c:\users\user\downloads\a8e792543157c0064bc50395b55ad8ea742c882f_0000089257"
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Open C:\WINDOWS\system32\cmd.exe /c del "c:\users\user\downloads\a8e792543157c0064bc50395b55ad8ea742c882f_0000089257"
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