Weird is a not dangerous memory resident parasitic Win32 virus. It writes itself to the end of PE EXE files (Windows executable) by increasing last file section and modifying PE header fields. The virus copy in infected files consists of two parts. First part (starter) is a short routine (about one kilobyte of code and data), the second part is the main virus code (about 10Kb of size) encrypted with silly encryption loop.
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
When the infected file is executed, the starter takes control, decrypts the second part of virus code, drops it to Windows directory as a PE EXE file with random name and executes it. The main virus instance stays memory resident as a hidden Windows application, runs a low priority thread that periodically scans drives' directory trees, looks for PE EXE files and infects them.
The virus also affects the EXPLORER.EXE file. It copies it with the EXPLORER.E name, infects this copy and writes the [rename] instruction to the WININIT.INI file to replace original EXPLORER.EXE with infected copy on next Windows startup.
The virus has a backdoor ability. When it is active as a Windows application it opens Internet connection and waits for specific calls from there. The virus has a lite list of supported commands comparing to other known backdoors, but it allows to upload, download, execute and delete files on the infected machine from remote host.
The virus contains the "copyright" text:
#Coded by Weird#