Welcome to the Virus Encyclopedia of Panda Security.
It carries out damaging actions on the affected computer.
It does not spread automatically using its own means.
|First detected on:||March 11, 2005|
|Detection updated on:||March 11, 2005|
OutSys.A is a virus that spreads to other computers by copying its code to other files or programs.
OutSys.A does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.
OutSys.A uses the following infection strategies:
- Resident: once it has been run, the virus goes memory resident and stops functions belonging to the operating system. Therefore, every time the operating system or an application tries to access any of these functions, the virus will activate and infect new files.
- Overwriting: it deletes the content of infected files and substitutes it with its code. Therefore, these files will be unusable and cannot be restored. When users try to open the original file, they will actually be running a copy of the virus.