Ukraine Family
Description Ukraine Family
These are very dangerous memory resident polymorphic parasitic stealth viruses. They hook INT 21h, and write themselves to the end of COM, EXE and OVL files (except COMM*.* ¿ DROZ*.*) that are accessed. The viruses check the file name by using the string:
.com.exe.ovlcommdrozarj.rar.pkziain.lha.chkd
and disable their stealth routines while executing several file compression utilities (ARJ, RAR, PKZIP, AIN, LHA), and disk checking utility CHKDSK.
On the 24th of any month, the viruses hook INT 1Ch, display the Ukrainian national flag, play a tune, decrypt and display a message in Ukrainian, and erase the disk sectors.
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Neumann.752
Description Neumann.752
It is a very dangerous memory resident parasitic virus. It hooks INT 21h and when any program is executed, the virus searches for COM-files (except COMMAND.COM) and writes itself to the end of the file. On May, 5th the virus erases the disk sectors. The virus contains the text strings:
[ NEUMANN J. (1903-57) V2.7 HUNGARY ]
*.COM
Neuro.3100
Description Neuro.3100
It is a dangerous memory resident polymorphic and stealth parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are accessed. The virus does not infect the anti-viruses SCAN, NAV, F-PROT, SHIELD and corrupts some file (anti-virus?).
The virus contains the text strings:
comCOM
[Neuromorphosis]
ANAVOTLDEManavotldem
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