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MALICIOUS PROGRAMS cont'd
VIRUS
During its lifetime a virus
will go through the following stages:
-
Dormant phase: In this state the virus is idle. The virus does not even replicate
in this phase but it may be activated by time or system conditions. It is very
careful to note though that not all viruses have this phase
-
Propagation phase:
the virus infects other executable programs or documents with an identical copy
of itself , each infected program now has this copy which will then enter the
propagation phase
-
Triggering phase:
the virus is activated to perform the necessary function for which it is
intended on the victim’s system. Here too as with the dormant state, any
condition may be used to activate the virus
-
Execution phase:
the virus executes on the victim’s system and performs its function, which can
be harmless or damaging
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WORMS
The Worm similarly goes through
its phases [http://www-courses.cs.uiuc.edu/~cs397
pgn/lectures/lecture3.pdf]
1. Search for other systems to infect
2. Establish connection to target remote system
3. Replicate self onto remote system
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POPULAR EXAMPLES OF MALICIOUS
PROGRAMS
o
I love you bug
http://www.cnn.com/2000/TECH/computing/05/04/iloveyou.01/
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This page was
developed by Keisha McKenzie, a member of the KRaM team
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