PathVir.1020
Description PathVir.1020
It is a dangerous nonmemory resident parasitic virus. It searches for COM (except COMMAND.COM) files in current directory and directories that are listed in PATH, then writes itself to the end of the file. On December 30th the virus creates (overwrites) the AUTOEXEC.BAT file on current disk and writes the commands to there:
@echo off
echo PATH-Virus v1.0 from AWVC laboratoriesall
PATH-VIR.COM
The virus then creates the PATH-VIR.COM file and writes a program to there, being executed that program halts the computer.
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Mecdon.1470
Description Mecdon.1470
This is a relatively harmless non-memory resident encrypted parasitic virus. It searches for EXE files in the current drive subdirectory tree, then writes itself to the end of the file. On Tuesdays, the virus displays the following message:
+---- Virus Warning : ----+
| I HATE mans who CAN`T do |
| anyfing USEFUL MallCDON`T |
| LET to do it for OTHERS. |
+--------------------------+
Mef.1481
Description Mef.1481
These are a harmless memory resident encrypted parasitic viruses. They hook INT 21h and writes themselves to the end of COM- and EXE-files that are executed or opened. The viruses check the file names and do not infect the files: AVG.*, ASTA*.*, STRO*.*, DPMI*.*, RTM.*, SCAN*.*.
The viruses use anti-debugger tricks, and under debugger they switch to search-and-infect routine that search for COM- and EXE-files in DOS or C:DOS directories, and infects them.
The virus contains the internal text strings:
*.exe *.com dos
AVG.ASTASTRODPMIRTM.SCAN
COMEXE
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