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Virus.DOS.Alabama or Alabama is DOS .exe infector from 1989. While its name may suggest that it is from the southern United States, it actually comes from Israel. It has a few unusual habits with regard to how it infects a file.

Behavior

When a file infected with Alabama is executed, the virus becomes memory resident. Unlike some other memory resident viruses, it does not neccessarily infect a file when it is executed. It will try to find a file to infect in the current directory, and failing that, will infect the file that has been executed. Every Friday, instead of infecting a file that it finds, it will execute that file instead of the one the user intended.

One hour after execution, the virus displays the flashing text:

+-----------------------------------------------------+
¦ SOFTWARE COPIES ARE PROHIBITED BY INTERNATIONAL LAW ¦
¦                                                     ¦
¦          Box 1055 Tuscambia ALABAMA                 ¦
+-----------------------------------------------------+

Variants

Alabama.B infects .com files.

Name

The virus gets its name from the text it displays on the screen. Ironically, Alabama was actually discovered in Israel.

Other Facts

There is a joke about an "Alabama virus", which is really just a program that displays a message telling the user to delete all files on the computer and pass the program to other users. The joke is most likely not related to the actual Alabama virus. There are similar jokes targeting other regional and ethnic stereotypes.

Videos

No videos available.

Sources

Yisrael Radai, Hebrew University of Jerusalem. Reports collected and collated by PC-Virus Index, Alabama.

F-Secure Antivirus, F-Secure Virus Descriptions : Alabama.

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