Chapa Family
Description Chapa Family
These are memory resident parasitic viruses. They hook INT 21h and write themselves to the beginning of COM-files that are executed. The viruses contain the text strings:
"Chapa.447": ANTI "T.M.E.- VARNA",VIRUS BY MIK
"Chapa.448": V.Black LoveCM
"Chapa.450.a": CHAPA
"Chapa.450.b": T.M.E. - VARNA
"Chapa.450.c": *BY APAHC*
"Chapa.566": ANTI "T.M.E.- VARNA",VIRUS BY MIK.F;
"Chapa.572": 21/10/95 - "Black Love".
May Autor is Mr.Loverman T.M.E - Varna.
"Chapa.586": *"MG-VARNA" THE BEST SCHOOL ALL THE WORLD. BY APAHC*
All these viruses except "Chapa.450.a,c" also hook INT 13h and depending on the system timer corrupt the data that are stored on disk.
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AD.132
Description AD.132
This is harmless nonmemory resident parasitic virus. It searches for COM files in the current directory, then writes itself to the end of the file. The virus contains the ID-byte ADh.
Ada.2600
Description Ada.2600
This is a very dangerous memory resident virus. It hooks INT 8, 13h, 21h and writes itself into the beginning of .COM-files that are started. The virus makes a "cracking" sound through the PC's speaker. This virus searches for the file PCCILLIN.COM and if this file exists the virus can erase the contents of the Boot-sectors and the FATs of the first HD. While deleting the files this virus sets their file-attributes as HIDDEN. The virus also contains the texts:
COMMAND.COM
PCCILLIN.COM
PCCILLIN.IMG
PCCILLIN.COM
HATI-HATI !! ADA VIRUS DISINI !!
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