Rizal is a trojan that damages critical system files. The trojan is a Windows NE (16-bit) file 14kb long.
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 run the trojan first adds a big amount of similar command blocks AUTOEXEC.BAT. These commands will clear screen, output the below given messages and wait for key to be pressed.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- R I Z A L I A N T R O J A N PROGRAMMED BY: THE HAMMER HEAD TEAM Computer Science Dept. Jose Rizal University Shaw BLVD Mandaluyong City Philppines LARRY CONANAN and BENITO TY -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Then the trojan destroys MSDOS.SYS file by zeroing it. This only affects DOS and Windows 9x/ME systems.
After that the trojan starts to copy files from \Windows\Command\ folder to \My Documents\, \Windows\, \Windows\System\, \Windows\System\Iosubsys\ and \Windows\Help\ folders. The copied files have zero length. After restart an affected system could become unusable.