Virus infects exe files

Note You need administrative rights to change the settings. Find the latest advice in our Community. See the user guide for your product on the Help Center. Chat with or call an expert for help. A , is also in the wild. The virus does not infect files with these names:. The DLL is the main virus component. The SYS file is a rootkit component that hides certain files and Registry keys.

If the files that belong to terminated processes are located in specific folders, they are deleted. If connection is successful, the virus copies itself as "Setup. Javascript is disabled in your web browser For full functionality of this site it is necessary to enable JavaScript. Classification Category :. You can also see our advanced troubleshooting page or search the Microsoft virus and malware community for more help.

BN might be downloaded and installed by other malware. File infection. BN infects. EXE and. SCR files, hence actions such as copying or viewing files with Explorer , including on shares with write access will result in files being infected, and the virus spreading from PC to PC.

The virus injects its own code into a system process such as " explorer. DLL :. Thus, every time an infected process runs, so does the virus. When you open an HTML file, the browser connects to this server without you knowing. The HTML page hosted at this location attempts to exploit a number of different vulnerabilities browser-based and program-specific vulnerabilities in order to run a copy of the virus.

The virus also modifies the local machine's Hosts file, redirecting the domain " zief. Allows backdoor access and control. Should this fail, it instead attempts to connect to " proxim. An EXE infector can be prepending writes itself before the original file , appending writes itself to the end of the original file , overwriting overwrites the original file with its own code , inserting inserts itself into gaps inside the original file , companion renames the original file and writes itself with the original file's name and cavity infector writes itself between file sections of bit file.

An EXE infector can be memory resident and non-memory resident. Memory resident viruses stay active in memory, trap one or more system functions usually interrupt 21h or Windows file system hooks and infect files while they are accessed. Non-memory resident viruses search for EXE files on a hard disk and infect them. An EXE infector can be non-encrypted, encrypted or polymorphic.

An encrypted or polymorphic virus consists of one or more decryptors and a main code. A decryptor decrypts main virus code before it could be started. Encrypted viruses usually use fixed or variable key decryptors while polymorphic viruses have decryptors that are randomly generated from processor instructions and contain a lot of commands that are not used in decryption process.

Javascript is disabled in your web browser For full functionality of this site it is necessary to enable JavaScript. EXE infector. Classification Category :. Type :. Aliases :. Summary EXE Infector generic description. Removal Automatic action Suspect a file is incorrectly detected a False Positive?