Selected viruses, spyware, and other threats: sorted alphabetically

These ate resident COM and EXE infectors. They hook the DOS interrupt INT 21h and attack programs when they are executed. Istanbul.1312 occasionally beeps from the computer speaker. They contain the following text but that is not displayed:

Istanbul.1312: Written in the city of Istanbul (c)1993
Istanbul.1349: Installed Anti-Virus?? Written in the city of Istanbul (c)1993

Both these texts are paraphrases of the text in the virus Dark Avenger .

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