Ugra.1394
Description Ugra.1394
It is a very dangerous memory resident parasitic polymorphic virus. It hooks INT 1Ch, 21h and writes itself to the end of EXE files that are executed. The virus does not infect the files *AN, *IT, *AV, *OT, *RU (anti-viruses SCAN, NAV, F-PROT, FINDVIRU).
The virus runs its internal counter that saves in second sector of the hard drive, and depending on this counter the virus erases hard drive sectors, the CMOS, beeps the speaker, disables printing, slows down, halts or reboots the computer.
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Adolf.475
Description Adolf.475
It is a very dangerous memory resident virus that by standard way hits COM- and OVL-files at they loading into memory. The virus copies its TSR part into interrupt vector table at address 0000:0200. It contains a text "Adolf Hitler". With a probability of 1/8 it stops a file deleting, hooks INT 21h.
Adrenalin.571
Description Adrenalin.571
It is a dangerous nonmemory resident parasitic virus. It searches for .COM files, then writes itself to the end of the file. The virus leaves the part of code in the system memory, hooks INT 21h, intercepts FindFirst/Next DOS calls, and returns "decreased" lengths of the infected files. In some cases the virus overwrites the files with trojan program. While executing that program erases CMOS and displays the message:
ADRENALIN OVERDOSE error. System dead.
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