Uruk Family
Description Uruk Family
These are not dangerous memory resident parasitic COM-infectors. They hook int 21h. From 0:00am till 1:00am "Uruk.300" types the message:
Igor 1992 v.2.0 The Uruk-hai and winged Nazgul strikes again!
From 10:00am till 11:00am "Uruk.361" sets the disk C: on the call to DOS function 'change directory'. It contains the text:
Igor 1992 v.3.0 It was last assault of the Uruk-haiall
We shall meet in Valhalla!
On every hour "Uruk.394" shifts the first letters of all the screen lines down by 1 position. It contains the internal text string:
V 1.0 Igor,1992 The Uruk-hai are upon you!
On the first minute of every hour "Uruk.427" displays the message
Invalid user. Replace and strike a key
and reboots the computer.
Tolkien fans can read more information in the "Frodo", "Nazgul.266" descriptions.
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Caterpillar.a
Description Caterpillar.a
This is a memory resident harmless virus. It hooks INT 1Ch, 21h and writes itself to the end of COM and EXE files. The files are infected as they are started or searched in directories by DOS functions FindFirst/Next FCB. Under some conditions a "green caterpillar" begins to creep along the screen.
The Caterpillar only shows up when the following conditions are met: after the virus has infected the computer for 2 months, and has an EGA monitor or better, and runs an ANSI device driver.
Cathinone.440
Description Cathinone.440
It is a harmless nonmemory resident parasitic virus. It searches for EXE files in the current and all parent directories, then writes itself to the end of files. After infecting the virus displays the message:
Cathinone v1.0 by: Evul
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