Ava Family
Description Ava Family
These are the memory resident parasitic EXE-infectors. They hook INT 21h and write themselves at the end of EXE-files upon their execution or opening.
Ava.550
It's a harmless virus. Tt doesn't manifest itself.
Ava.600
It's a dangerous virus. It contains the text string " Ava " and sometimes changes the offset of the information saved.
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Cagliari family
Description Cagliari family
These are very dangerous memory resident parasitic viruses. They hook INT 21h and write themselves to the end of .COM files that are executed. On May 1st they erase the FAT sectors on disks A, B, C, D and then display the message:
caGLiArI
The similar string is used by virus in its "Are you here?" call - while installing the virus calls INT 21h with AX=FFABh, the memory resident copy returns 'CA', 'GL', 'IA', 'RI' in registers AX,BX,CX,DX.
Calu.2429
Description Calu.2429
It is a dangerous nonmemory resident parasitic polymorphic virus. It searches for .COM files, then writes itself to the end of the file. The virus polymorphic decryption loop contains several not correct tricks, as a result depending on the system timer it cannot decrypt the virus body, and infected file halts the computer. The virus contains the texts:
[CALU]
Coding error: Too Drunk error !
I'm TOOSAD from Romania
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