Virus Database

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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Olga.4448

Description Olga.4448

This is a very dangerous memory resident parasitic virus. It hooks INT 21h, and writes itself to the beginning of COM files when their attributes are modified (some utilities, including anti-viruses, do this while processing files). In October, the virus erases sectors on the current drive and displays messages in Russian and broken English:
You must undertake nothing ,if you need the
datas stored on your default disk.
I M A R C E N C Y
T H E V I R U S O L G A W O R K I N G .
( W R I T E N B Y S C O R P I O N )

Olga.483

Description Olga.483

It is a dangerous memory resident multipartite virus. It writes itself to the MBR of the hard drive and into the header of EXE files, if there is free space. When an infected file is executed, the virus infects the MBR and returns to the host program. While loading from infected MBR the virus hooks INT 13h and then infects EXE headers that are accessed. On December 27 the virus erases the disk sectors. The virus contains the text string:
SGB:Olga++

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