Trojan.MSIL.Filecoder.BT

The detection of Trojan.MSIL.Filecoder.BT indicates that your system has been compromised by a malicious threat. This type of malware is designed to cause harm to your computer and potentially steal sensitive information. It is essential to take immediate action to remove the threat and prevent further damage.

What Is Trojan.MSIL.Filecoder.BT?

Trojan.MSIL.Filecoder.BT is a type of Trojan horse malware that can infect a computer system without the user's knowledge or consent. The name suggests that it may be related to file encoding or ransomware, but the exact nature of the threat is not immediately clear. Trojan horses are known for their ability to disguise themselves as legitimate programs, making them difficult to detect. They can be used to steal sensitive information, disrupt system operation, or provide unauthorized access to the infected computer.

How Trojan.MSIL.Filecoder.BT Operates

Once installed, Trojan.MSIL.Filecoder.BT can operate in various ways, depending on its intended purpose. It may attempt to connect to a command and control server to receive instructions or transmit stolen data. The malware may also try to spread to other computers on the network or via removable drives. In some cases, it may encrypt files or lock the system, demanding a ransom in exchange for the decryption key. The exact operation of Trojan.MSIL.Filecoder.BT is unknown, but it is clear that it poses a significant threat to the security and integrity of the infected system.

Symptoms of Infection

The symptoms of a Trojan.MSIL.Filecoder.BT infection can vary, but common signs include slow system performance, unexpected pop-ups or alerts, and unusual network activity. You may also notice that files are missing or have been encrypted, or that your antivirus software is disabled. In some cases, the malware may not exhibit any noticeable symptoms, making it difficult to detect without the aid of security software.

• Slow system performance or crashes
• Unusual network activity or connections
• Missing or encrypted files
• Disabled antivirus software
• Unexpected pop-ups or alerts

How to Remove Trojan.MSIL.Filecoder.BT

1. Boot your computer in Safe Mode with Networking to prevent the malware from loading.
2. Use a reputable antivirus tool, such as SpyHunter, to perform a full scan of your system and remove any detected threats.
3. Uninstall any suspicious programs or applications that may be related to the malware.
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 computer and run another scan to ensure that the threat has been completely removed.

Conclusion

The removal of Trojan.MSIL.Filecoder.BT requires immediate attention to prevent further damage to your system and sensitive information. By following the steps outlined above, you can help ensure the complete removal of the malware and prevent future infections. It is essential to remain vigilant and keep your antivirus software up to date to protect against emerging threats. Remember to always be cautious when opening email attachments or downloading software from unknown sources, as these are common ways for malware to infect a system.

Analysis Report

General information

Family Name:	Trojan.MSIL.Filecoder.BT
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: e22c74604665bd91c132139d41a939b6 SHA1: 4b7e903fb54b3b711fb029dcd659c6a0e2df2f4d SHA256: 258B0DC1C9E1DF289B2A0E971F0B49648F725C3B540B8F3AF42BE3403EE31239 File Size: 510.98 KB, 510976 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 exports table
• File doesn't have security information
• File is .NET application
• File is 32-bit executable
• File is either console or GUI application
• File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
• 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

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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
Assembly Version	6.6.6.6
File Description	Ransomware
File Version	2.0.7.7
Internal Name	Encryptor.exe
Legal Copyright	Ransomware @ 2026
Original Filename	Encryptor.exe
Product Version	2.0.7.7

File Traits

• .NET
• Agile.net
• Fody
• Run
• x86

Block Information

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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:	63
Potentially Malicious Blocks:	43
Whitelisted Blocks:	20
Unknown Blocks:	0

Visual Map

x x 0 0 0 x x x x x x x 0 x x 0 0 0 0 0 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 0 0 0 0 0 0 0 0 0 0 0

0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

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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.

• MSIL.Filecoder.BT

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:\users\public\desktop\encryptor.log	Generic Write,Read Attributes
c:\users\user\appdata\roaming\encryptor.log	Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\roaming\encryptor.log	Generic Write,Read Attributes
c:\users\user\desktop\image.bmp	Generic Write,Read 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\examplemutex::encryptor		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing::enableconsoletracing		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::enablefiletracing		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::enableautofiletracing		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::enableconsoletracing		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::filetracingmask	￿	RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::consoletracingmask	￿	RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::maxfilesize		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::filedirectory	%windir%\tracing	RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::enablefiletracing		RegNtPreCreateKey

Show More

HKLM\software\wow6432node\microsoft\tracing\rasmancs::enableautofiletracing		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::enableconsoletracing		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::filetracingmask	￿	RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::consoletracingmask	￿	RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::maxfilesize		RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::filedirectory	%windir%\tracing	RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\run::microsoftupdater	c:\users\user\downloads\4b7e903fb54b3b711fb029dcd659c6a0e2df2f4d_0000510976	RegNtPreCreateKey
HKCU\software\microsoftplugins::setwallpaper	1	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
User Data Access	GetComputerName GetUserDefaultLocaleName GetUserName GetUserObjectInformation
Anti Debug	IsDebuggerPresent NtQuerySystemInformation
Other Suspicious	AdjustTokenPrivileges
Network Winsock2	WSAConnect WSASocket WSAStartup WSAttemptAutodialName
Network Winsock	closesocket freeaddrinfo getaddrinfo recv send setsockopt
Network Winhttp	WinHttpOpen
Network Info Queried	GetAdaptersAddresses GetNetworkParams
Encryption Used	BCryptOpenAlgorithmProvider