Chad Family
Description Chad Family
These are dangerous nonmemory resident parasitic viruses. They search for .COM files, then write themselves to the end of the file. Sometimes they display the picture:
______
/ ¦ O O ¦
-------------WW---- --+-WW------------
------------------- ------------------
-----------------------------------------
-------- WOT!! No Anti - Virus ---------
-------- Software all.. ---------
-----------------------------------------
-----------------------------------------
and halt the computer. The viruses also contain the text string:
CHAD Against Damaging Viruses ... Save Our Software. 1992.
"Chad.301,307" display the text:
You have the Phague
Check other viruses! Be aware! Use Antiviral Software
CA.815
Description CA.815
It is a dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed. The virus does not infect *AN.*, *OT.* and *AN.* files.
Depending on the system time the virus halts the system. The virus contains the text:
[nORThMeNS aNGeR] Coded by C.A, Karlstad, Sweden, 10/96
Caesar
Description Caesar
This is a harmless, non-memory resident encrypted parasitic DOS virus. It infects DOS EXE files and creates its "dropper" in the C:WINDOWS directory.
When an infected file is run, the virus creates the infected CAESAR.EXE file (virus dropper) in the C:WINDOWS directory and overwrites the WINSTART.BAT file with an instruction that will run the virus dropper. As a result, virus dropper is activated each time Windows is started up. The virus then returns control to the host program and does not infect any other files.
When the virus dropper takes control, it searches for *.EXE files on all drives and infects them. While infecting, it writes itself to the end of the file. The virus checks file names and avoids infecting the following files:
AN*, AD*, DR*, PR*, NC*, WI*
Because of its method of infection, the virus is functional only when Windows is installed exactly in the C:WINDOWS directory.
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