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TIPOS DE VIRUS INFORMÁTICOS.
VIRUS RESIDENTES NA MEMORIA.
Os virus residentes da memoria son aqueles que están
escondidos na memoria RAM da computadora. Caracterízanse
pola súa infección e polo seu nivel de infección, e porque son os
máis comúns.
VIRUS DE SOBREESCRITURA E
ACCIÓN DIRECTA.
O virus de acción directa, que son os que non permanecen
residentes na memoria e reprodúcense ao executar o arquivo
infectado e os virus sobrescribir que corrompen o ficheiro onde se
atopan cando se sobrescribe.
VIRUS DE SECTOR DE ARRANQUE.
Son os que modifican o sector de arranque (partición DOS do
disco ríxido ou disquete). Como regra xeral, substitúe ao sector de
inicio orixinal coa súa propia versión para arrincar o sistema,
cando se inicia unha sesión de traballo, execútase na versión
contaminada, toma o control da memoria e toma o control da
computadora.
VIRUS FAT.
Un virus FAT é un virus que entra no disco ríxido e que afecta ao
sistema
É un elemento fundamental no sistema. Os virus que atacan este
elemento son especialmente perigosos, xa que evitarán o acceso
a determinadas partes do disco, onde se almacenan os ficheiros
críticos para o funcionamento normal da computadora.
MACRO VIRUS OU VIRUS DE MARCO.
Os virus Macro son un virus informático que altera os movementos
realizados por un programa para realizar accións habituais.
Normalmente incorporado en documentos ou inseridos en código
en programas de procesamento de textos.
Do mesmo xeito que os troianos, tamén parecen benignos e pasan
desapercibidos, polo que a súa eliminación é moi difícil.
VIRUS POLIMÓRFICO.
En relación cos virus informáticos, un código polimórfico ou
polimorfismo é o que usa un motor polimórfico para mutarse
mentres mantén intacta o seu algoritmo orixinal.
VIRUS DE TIPO DE SECUENCIAS DOS
COMANDOS WEB.
A maioría dos sitios web inclúen algúns códigos complexos para crear
contido interesante e interactivo. Este tipo de código é frecuentemente
explotado. A maioría orixínase de páxinas web ou navegadores
infectados.
FIN
FIN

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Trabajo de virus

  • 1. TIPOS DE VIRUS INFORMÁTICOS.
  • 2. VIRUS RESIDENTES NA MEMORIA. Os virus residentes da memoria son aqueles que están escondidos na memoria RAM da computadora. Caracterízanse pola súa infección e polo seu nivel de infección, e porque son os máis comúns.
  • 3. VIRUS DE SOBREESCRITURA E ACCIÓN DIRECTA. O virus de acción directa, que son os que non permanecen residentes na memoria e reprodúcense ao executar o arquivo infectado e os virus sobrescribir que corrompen o ficheiro onde se atopan cando se sobrescribe.
  • 4. VIRUS DE SECTOR DE ARRANQUE. Son os que modifican o sector de arranque (partición DOS do disco ríxido ou disquete). Como regra xeral, substitúe ao sector de inicio orixinal coa súa propia versión para arrincar o sistema, cando se inicia unha sesión de traballo, execútase na versión contaminada, toma o control da memoria e toma o control da computadora.
  • 5. VIRUS FAT. Un virus FAT é un virus que entra no disco ríxido e que afecta ao sistema É un elemento fundamental no sistema. Os virus que atacan este elemento son especialmente perigosos, xa que evitarán o acceso a determinadas partes do disco, onde se almacenan os ficheiros críticos para o funcionamento normal da computadora.
  • 6. MACRO VIRUS OU VIRUS DE MARCO. Os virus Macro son un virus informático que altera os movementos realizados por un programa para realizar accións habituais. Normalmente incorporado en documentos ou inseridos en código en programas de procesamento de textos. Do mesmo xeito que os troianos, tamén parecen benignos e pasan desapercibidos, polo que a súa eliminación é moi difícil.
  • 7. VIRUS POLIMÓRFICO. En relación cos virus informáticos, un código polimórfico ou polimorfismo é o que usa un motor polimórfico para mutarse mentres mantén intacta o seu algoritmo orixinal.
  • 8. VIRUS DE TIPO DE SECUENCIAS DOS COMANDOS WEB. A maioría dos sitios web inclúen algúns códigos complexos para crear contido interesante e interactivo. Este tipo de código é frecuentemente explotado. A maioría orixínase de páxinas web ou navegadores infectados.
  • 9. FIN
  • 10. FIN