Virus Database

15years.a

Description 15years.a

It's a dangerous memory encrypted resident boot virus. It hooks INT 16h, 13h and writes itself into MBR of hard drive and boot sectors of floppy disks. On April, 7th it overwrites disk sectors with the string:
Esto te pasa por programas que a nosotros nos cuesta tanto
trabajo hacer. Que te quede de Experiencia, México,1994

Depending on its internal counters the virus changes the keys that are entered from keyboard. It contains the internal text string also:
This Virus is from MEXICO, I have 15 years old

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Constructor.VCL

Description Constructor.VCL

The virus constructor utility VCL.EXE (Virus Creation Laboratory) seems to be the most well-known virus creation tool. This constructor can generate source assembler files of the viruses, OBJ modules and infected master files. VCL contains the standard pop-up menu interface. By using VCL menus, it is possible to choose the virus type, enable or disable self encryption, anti-debugging code, and internal text strings. It also is possible to choose up to 10 effects, which are summoned upon virus execution, etc. VCL-based viruses can use a standard means for infection (they append their code to the files while infecting them), they can overwrite the files or use companion technology.
The main properties of VCL-viruses are:
they are non-memory resident;
they scan the subdirectory three or the current directory of the current drive while infecting files;
they append to COM files, or create new COM files or overwrite COM and EXE files.

Conzouler.230

Description Conzouler.230

These are harmless memory resident parasitic viruses. They hook INT 21h and write themselves to the end of COM-files that are executed. The viruses do not manifest themselves. They were written by somebody who named itself "Conzouler/IR".

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