Trojan.Small.XA
Threat Scorecard
EnigmaSoft Threat Scorecard
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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) |
| First Seen: | October 24, 2026 |
| Last Seen: | October 28, 2026 |
| OS(es) Affected: | Windows |
Trojan.Small.XA is a dangerous Windows-based Trojan horse that has been actively detected between late October 2026, with a high danger rating due to its capacity to grant attackers remote access to infected systems. Unlike viruses, Trojans like Small.XA do not self-replicate, but they are often more damaging because they operate covertly while opening the door to further compromise.
Table of Contents
What Trojan.Small.XA Does
Once active on a system, Trojan.Small.XA runs silently in the background without displaying any visible windows or alerts, making it difficult for an average user to notice anything wrong. It is packed using UPX, a common technique used to compress and obfuscate executable files so that it is harder for security tools to analyze and detect. The Trojan carries no digital signature, no version information, and lacks standard file metadata, all of which are hallmarks of malicious software trying to avoid scrutiny.
During execution, Trojan.Small.XA has been observed creating files and folders in system directories, modifying configuration-type files, and establishing named pipe communication channels that can be used to pass data between malicious processes. It also includes functionality to detect whether it is being analyzed in a debugging environment, suggesting the authors built in evasion techniques to resist being studied by security researchers. The malware additionally touches on user interface and input-related system functions, which is typical behavior for Trojans designed to monitor user activity or interfere with how a victim interacts with their own machine. Once embedded, this Trojan may allow attackers to gain extensive control over the infected computer, covertly delete files, install additional malware, and potentially steal sensitive information stored on the system.
How It Usually Gets Onto Computers
Trojan.Small.XA typically spreads through software downloads from compromised or malicious websites and via email attachments sent from untrustworthy or spoofed sources. These attachments may be disguised using common file extensions such as .exe, .pif, .avi, or even .jpg files to trick users into opening them. The Trojan can also take advantage of unpatched system vulnerabilities and security flaws to install itself without any direct action from the user, a method commonly referred to as a stealth or drive-by installation.
Risks for the User
Because Trojan.Small.XA can give attackers remote control over an infected machine, the risks are severe. Victims may face unauthorized data theft, deletion of important files, installation of additional malicious programs, and a general loss of control over their system. Given its danger rating of 8 out of 10, this threat should be treated as a serious security incident rather than a minor nuisance.
Signs of Infection
Because this Trojan is designed to run silently, signs of infection are often subtle. Users may notice unexplained new files or folders appearing in system locations, unusual background processes, sluggish system performance, or unexpected network activity. Since it lacks a visible interface, many infections go unnoticed until secondary symptoms, such as additional malware or data loss, appear.
How to Stay Protected
To reduce the risk of infection, users should avoid opening email attachments from unknown or unverified senders, especially executable or unusually formatted files. Keeping the Windows operating system and all installed software fully updated helps close the security vulnerabilities that threats like Trojan.Small.XA often exploit. Downloading software only from official, reputable sources and maintaining regular system backups further reduces the potential damage from this type of infection.
Analysis Report
General information
| Family Name: | Trojan.Small.XA |
|---|---|
| Packers: | UPX |
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
cd2cc566ce185404c50413018e514f1f
SHA1:
eaa5309f2c6b063ad07c7ee6137b0998cf196e3f
SHA256:
2B97EF29AEB261A0482A6F41A8832E38A3C6E712F5EE63ADF5C30C65F6C2FF94
File Size:
3.06 MB, 3055459 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 relocations information
- 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)
- File is Native application (NOT .NET application)
Show 2 more
- 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
- No Version Info
- x86
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\namedpipe\gmdasllogger | Generic Write,Read Attributes |
| c:\32788r22fwjfw | Synchronize,Write Attributes |
| c:\32788r22fwjfw\023.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\023.dat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\023v.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\023v.dat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\appinit.bad | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\appinit.bad | Synchronize,Write Attributes |
| c:\32788r22fwjfw\assoc.cmd | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\assoc.cmd | Synchronize,Write Attributes |
Show 51 more
| c:\32788r22fwjfw\badclsid | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\badclsid | Synchronize,Write Attributes |
| c:\32788r22fwjfw\boot.bat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\boot.bat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\bootsect | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\bootsect | Synchronize,Write Attributes |
| c:\32788r22fwjfw\c.bat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\c.bat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\catchme.cfexe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\catchme.cfexe | Synchronize,Write Attributes |
| c:\32788r22fwjfw\clsid.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\clsid.dat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\combo-fix.sys | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\combo-fix.sys | Synchronize,Write Attributes |
| c:\32788r22fwjfw\combobatch.bat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\combobatch.bat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\combofix-download.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\combofix-download.exe | Synchronize,Write Attributes |
| c:\32788r22fwjfw\creg.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\creg.dat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\cregc.cmd | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\cregc.cmd | Synchronize,Write Attributes |
| c:\32788r22fwjfw\cregc.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\cregc.dat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\dd.cfexe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\dd.cfexe | Synchronize,Write Attributes |
| c:\32788r22fwjfw\ddsdo.sed | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\ddsdo.sed | Synchronize,Write Attributes |
| c:\32788r22fwjfw\delclsid.bat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\delclsid.bat | Synchronize,Write Attributes |
| c:\32788r22fwjfw\dpf.sed | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\dpf.sed | Synchronize,Write Attributes |
| c:\32788r22fwjfw\dpf.str | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\dpf.str | Synchronize,Write Attributes |
| c:\32788r22fwjfw\dumphive.cfexe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\dumphive.cfexe | Synchronize,Write Attributes |
| c:\32788r22fwjfw\embedded.sed | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\embedded.sed | Synchronize,Write Attributes |
| c:\32788r22fwjfw\erdnt.e_e | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\erdnt.e_e | Synchronize,Write Attributes |
| c:\32788r22fwjfw\erdntdos.loc | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\erdntdos.loc | Synchronize,Write Attributes |
| c:\32788r22fwjfw\erdntwin.loc | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\erdntwin.loc | Synchronize,Write Attributes |
| c:\32788r22fwjfw\erunt.cfexe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\erunt.cfexe | Synchronize,Write Attributes |
| c:\32788r22fwjfw\erunt.loc | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\32788r22fwjfw\erunt.loc | Synchronize,Write Attributes |
| c:\__tmp_rar_sfx_access_check_9842114 | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.1.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.2.regtrans-ms | Generic Read,Write Data,Write Attributes,Write extended,Append data |
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 |
|
| User Data Access |
|
| Keyboard Access |
|
