Trojan.Downloader.XB

The detection of Trojan.Downloader.XB on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to download and install additional malicious software on your computer, which can lead to a range of problems, including data theft, system crashes, and unauthorized access to your personal information.

What Is Trojan.Downloader.XB?

Trojan.Downloader.XB is a type of Trojan horse malware that disguises itself as a legitimate program or file. Once installed on your system, it can download and execute additional malware, allowing attackers to gain control over your computer. The name "Trojan.Downloader.XB" suggests that it is a downloader-type Trojan, which is designed to download and install other malicious software.

How Trojan.Downloader.XB Operates

Trojan.Downloader.XB operates by exploiting vulnerabilities in your system or tricking you into installing it. It can be spread through various means, including infected email attachments, malicious websites, or infected software downloads. Once installed, it can connect to a command and control server to receive instructions and download additional malware. This can lead to a range of malicious activities, including data theft, keylogging, and ransomware attacks.

Symptoms of Infection

The symptoms of a Trojan.Downloader.XB infection can vary, but common signs include slow system performance, unexpected pop-ups or ads, and unfamiliar programs or icons on your desktop. You may also notice that your browser homepage or search engine has been changed, or that your system is crashing frequently. In some cases, you may not notice any symptoms at all, which is why it's essential to run regular virus scans and keep your antivirus software up to date.

How to Remove Trojan.Downloader.XB

1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools.
2. Download and install a reputable anti-malware tool, such as SpyHunter, and run a full scan to detect and remove the malware.
3. Uninstall any suspicious programs or applications that you don't recognize or that were installed recently.
4. Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons.
5. Reboot your system and run another full scan to ensure that the malware has been completely removed.

Conclusion

Removing Trojan.Downloader.XB from your system requires careful attention to detail and a thorough understanding of the malware removal process. By following the steps outlined above, you can help to ensure that your system is free from this malicious software and that your personal data is protected. Remember to always be cautious when downloading software or opening email attachments, and keep your antivirus software up to date to prevent future infections. Regular system maintenance and monitoring can also help to prevent malware infections and protect your system from potential threats.

Analysis Report

General information

Family Name:	Trojan.Downloader.XB
Signature status:	No Signature

Known Samples

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Known Samples

This section lists other file samples believed to be associated with this family.

MD5: bac2ab8f6bbc851866520e617a51148a SHA1: 88f35cba63a1770f03231feed8461a8622c58813 SHA256: 22FBFCA46362C3353DC0B36A2C4079F7C8D828F8ECBBFA08FAEFC1031F81E52C File Size: 1.26 MB, 1264855 bytes

Windows Portable Executable Attributes

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Windows Portable Executable Attributes

This section lists file attributes found within family samples. These attributes are extracted from the files’ Windows PE (Portable Executable) specification and various system flags. Portable Executable Attributes give malware researchers insight into a file’s functionality, executable details, platform and runtime environment.

• 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 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

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• IMAGE_FILE_DLL is not set inside PE header (Executable)
• IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

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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

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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
Comments	Nasiboot
Company Name	Nasiboot
File Description	Huynh Vu Thang
File Version	1.6.0.0
Legal Copyright	Copyright © 2021 Nasiboot
Product Name	Viet Nam

File Traits

• GetConsoleWindow
• HighEntropy
• VirtualQueryEx
• WriteProcessMemory
• x86

Files Modified

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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\inf\run.dll	Generic Write,Read Attributes
c:\windows\inf\run.dll	Synchronize,Write Attributes
c:\windows\inf\setup.exe	Generic Write,Read Attributes
c:\windows\inf\setup.exe	Synchronize,Write Attributes
c:\windows\inf\setup64.exe	Generic Write,Read Attributes
c:\windows\inf\setup64.exe	Synchronize,Write Attributes

Registry Modifications

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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
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

Windows API Usage

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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
Process Manipulation Evasion	NtUnmapViewOfSection
Process Shell Execute	ShellExecuteEx
Syscall Use	ntdll.dll!NtAdjustPrivilegesToken ntdll.dll!NtApphelpCacheControl ntdll.dll!NtClose ntdll.dll!NtCreateEvent ntdll.dll!NtCreateKey ntdll.dll!NtCreateMutant ntdll.dll!NtCreateSection ntdll.dll!NtDuplicateToken ntdll.dll!NtFreeVirtualMemory ntdll.dll!NtMapViewOfSection Show More ntdll.dll!NtNotifyChangeKey ntdll.dll!NtOpenEvent ntdll.dll!NtOpenFile ntdll.dll!NtOpenKey ntdll.dll!NtOpenKeyEx ntdll.dll!NtOpenProcessToken ntdll.dll!NtOpenProcessTokenEx ntdll.dll!NtOpenSection ntdll.dll!NtOpenThreadToken ntdll.dll!NtProtectVirtualMemory ntdll.dll!NtQueryAttributesFile ntdll.dll!NtQueryInformationProcess ntdll.dll!NtQueryInformationThread ntdll.dll!NtQueryInformationToken ntdll.dll!NtQueryKey ntdll.dll!NtQueryLicenseValue ntdll.dll!NtQueryPerformanceCounter ntdll.dll!NtQuerySecurityAttributesToken ntdll.dll!NtQuerySecurityObject ntdll.dll!NtQuerySystemInformation ntdll.dll!NtQueryValueKey ntdll.dll!NtQueryWnfStateData ntdll.dll!NtReadRequestData ntdll.dll!NtReleaseWorkerFactoryWorker ntdll.dll!NtSetEvent ntdll.dll!NtSetInformationKey ntdll.dll!NtSetInformationProcess ntdll.dll!NtSetInformationThread ntdll.dll!NtSetInformationVirtualMemory ntdll.dll!NtSetInformationWorkerFactory ntdll.dll!NtSubscribeWnfStateChange ntdll.dll!NtTestAlert ntdll.dll!NtTraceControl ntdll.dll!NtUnmapViewOfSection ntdll.dll!NtWaitForSingleObject ntdll.dll!NtWaitForWorkViaWorkerFactory ntdll.dll!NtWaitLowEventPair ntdll.dll!NtWriteFile UNKNOWN
Other Suspicious	AdjustTokenPrivileges

Shell Command Execution

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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.

(NULL) Setup64.exe