Ester
Description Ester
It is a very dangerous memory resident boot virus. It hooks INT 13h and overwrites MBR of the hard drive and boot sectors of the floppy disks. While infecting the virus does not store original code of the sectors. While loading the virus searches for active boot sectors on hard drive, and loads it.
The virus contains the encrypted text strings:
E s t e r
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Cholera Family
Description Cholera Family
These are dangerous memory resident parasitic viruses. They hook INT 21h and write themselves to the end of .COM- and .EXE-files that are executed. They infect some files incorrectly, these files halt the system on execution. Depending on the system time these viruses also hook INT 08h and delay on each timer tick. They contain the internal text strings:
"Cholera.a": Cholera v1.0 by dr Hellraiser 94-02-03
"Cholera.b": Cholera v2.0 by dr Fleischman 93-12-29
Chris.463
Description Chris.463
It's a not dangerous memory resident parasitic virus. It copies itself into the interrupt vector table, hooks INT 21h and writes itself to the end of .COM-files that are executed. Sometimes it decrypts and types the message: "Mary,all. ti AMO!". It also contains the internal text string: "", the word "inf" is placed at the end of infected files.
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