Agena (computer virus)

Agena (computer virus)

Computer virus
Fullname = AGENA
Common name = Agena
Technical name = AGENA
Family = N/A
Aliases = Agena, Agena.723
Classification = Virus
Type = DOS
Subtype = COM and EXE infector. Replicant.
IsolationDate = 1992
Isolation = Unknown
Origin = Spain
Author = Unknown

AGENA is a memory resident, file infecting computer virus which infects .COM and .EXE files, including command.com. It was discovered in Spain in September, 1992. Upon infection, 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.

External links

* [http://www.probertencyclopaedia.com/L21.HTM Computer Viruses (A)] , by Probert Encyclopedia
* [http://vil.nai.com/vil/content/v_98146.htm Agena virus] , by McAfee


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Agena — may refer to:People* Christine Keiko Agena (1973), an American actressAstronomy * a proper name of the star Beta Centauri or HadarGeography* Agena, a japanese village were was teaching the karate master Shimabuku TatsuoOther* the RM 81 Agena… …   Wikipedia

  • List of Kim Possible characters — From left to right: Wade Load(in the screen), Dr. James Timothy Possible, Mrs. Dr. Ann Possible, Ron, Rufus, Kim Possible, Shego, Dr. Drakken, Monkey Fist, Señor Senior Sr., Adrena Lynn, and Señor Senior Jr. This is a list of characters appearing …   Wikipedia

  • Mission Apollo — Programme Apollo Pour les articles homonymes, voir Apollo. Premiers pas sur la Lune de Buzz Aldrin le 20 juillet 1969 lors de la mission Apollo 11 avec …   Wikipédia en Français

  • Programme Apollo — Pour les articles homonymes, voir Apollo. Premiers pas sur la Lune de Buzz Aldrin le 20 juillet 1969 lors de la mission Apollo 11 avec sa combinaison spatiale A7L …   Wikipédia en Français

  • Vaisseau Apollo — Programme Apollo Pour les articles homonymes, voir Apollo. Premiers pas sur la Lune de Buzz Aldrin le 20 juillet 1969 lors de la mission Apollo 11 avec …   Wikipédia en Français

  • Athlon 64 — The Athlon 64 is an eighth generation, AMD64 architecture microprocessor produced by AMD, released on September 23, 2003.cite web|url=http://www.amd.com/us en/Corporate/VirtualPressRoom/0,,51 104 543 10218 74465,00.html|title=AMD Ushers in Era of …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”