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Virus Encyclopedia  Welcome to the Virus Encyclopedia of Panda
Security.  Encyclopedia GetVirusCard True 0   Threat
LevelModerate threatDamageHighDistributionNot widespread Common
name:Jerusalem.B Technical name:Jerusalem B Family Threat
level:Low Alias:Viernes 13 Effects:  It activates on Friday 13th
and deletes all the files that are run.  Affected platforms:
Detection updated on:Jan. 1, 1991 Country of origin:ISRAEL
Brief Description    Jerusalem.B is a resident virus that
infects files with an EXESYS and COM extension. This virus is
activated when the date on the system clock is Friday 13th and
it deletes all files run on the computer.  Jerusalem.B increases
the size of infected files. The size of a file increases every
time the infected file is run. It can also cause the computer to
slow down.  Jerusalem.B does not use any specific means to
spread. It can reach computers through the usual means used by
viruses: Internet downloads, flopp