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Agena is a computer virus first discovered in Spain in September 1992. It is a memory resident, file infecting computer virus which infects .COM and .EXE files, including command.com. Agena becomes memory resident at the top of system memory but below the 640K DOS boundary. Once it is memory resident, Agena infects .COM and .EXE files as they are executed. Infected programs will have a file length increase of 723 to 738 bytes with the virus being located at the end of the file. An infected file's date and time in the DOS disk directory listing are not altered. Total system and available free memory, as indicated by the DOS CHKDSK program, will have decreased by 1,296 bytes. Interrupts 20 and 21 are hooked by the virus. It is unknown what Agena may do besides replicate. No text strings are

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  • Agena (computer virus)
  • Agena (vírus de computador)
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  • AGENA é um vírus de computador residente em memória, que infeta ficheiros .COM e .EXE, incluindo o command.com. Foi descoberto em Espanha em setembro de 1992.
  • Agena is a computer virus first discovered in Spain in September 1992. It is a memory resident, file infecting computer virus which infects .COM and .EXE files, including command.com. Agena becomes memory resident at the top of system memory but below the 640K DOS boundary. Once it is memory resident, Agena infects .COM and .EXE files as they are executed. Infected programs will have a file length increase of 723 to 738 bytes with the virus being located at the end of the file. An infected file's date and time in the DOS disk directory listing are not altered. Total system and available free memory, as indicated by the DOS CHKDSK program, will have decreased by 1,296 bytes. Interrupts 20 and 21 are hooked by the virus. It is unknown what Agena may do besides replicate. No text strings are
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  • Agena is a computer virus first discovered in Spain in September 1992. It is a memory resident, file infecting computer virus which infects .COM and .EXE files, including command.com. Agena becomes memory resident at the top of system memory but below the 640K DOS boundary. Once it is memory resident, Agena infects .COM and .EXE files as they are executed. Infected programs will have a file length increase of 723 to 738 bytes with the virus being located at the end of the file. An infected file's date and time in the DOS disk directory listing are not altered. Total system and available free memory, as indicated by the DOS CHKDSK program, will have decreased by 1,296 bytes. Interrupts 20 and 21 are hooked by the virus. It is unknown what Agena may do besides replicate. No text strings are visible within the viral code in infected programs.
  • AGENA é um vírus de computador residente em memória, que infeta ficheiros .COM e .EXE, incluindo o command.com. Foi descoberto em Espanha em setembro de 1992.
aliases
  • Agena, Agena.723
author
  • Unknown
classification
common name
  • Agena
family
  • N/A
Fullname
  • AGENA 5
origin
  • United States
type
isolation
  • Unknown
IsolationDate
subtype
  • COM and EXE infector. Replicant.
Technical name
  • AGENA
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