Sebo.2048
Description Sebo.2048
It is not a dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM files that are executed. On selecting a new drive the virus also hooks INT 13h and then beeps on reading/writing some data.
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Telefonica Family
Description Telefonica Family
These are very dangerous viruses. They hit .COM- and .EXE-files being started or opened (by standard way), MBR of hard disk while an infected file is started and Boot-sectors of floppies while DOS access to them. The viruses are encoded in an infected files. During installation the infectors traces INT 13h, 21h, 40h and hooks INT 21h. The viruses contain more than 10 handlers of INT 21h into their bodies. The viruses contain the texts like a:
"(C) 1990 Grupo HOLOKAUSTO (Barcelona, Spain) Kampaña Anti-TELEFONICA: Mejor
servicio, Menores tarifasall";
"Virus Anti - C.T.N.E. (c)1990 Grupo Holokausto.
Kampanya Anti-Telefonica.
Menos tarifas y mas servicio.
Programmed in Barcelona (Spain).
23-8-90. - 666 -"
The part of viruses is wrote to MBR infects after only sectors and have no possibility to infect files. After 190hth booting from infected disk the infector erases the disk sectors and then type: "Campaña Anti-TELEFONICA (Barcelona)".
Telstra.1100
Description Telstra.1100
It is not a dangerous nonmemory resident parasitic virus. It searches for EXE files, then writes itself to the end of the file. The virus leaves a memory resident program that hooks timer events (INT 1Ch). On each timer tick this program scans keyboard buffer for "Telstra" string. If this string is found, the virus manifests itself by a video effect: switches monitor to graphic video mode and display the text:
TELSTRA IS KILLING THE OZ BBS SCENE!
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