Xynet.947
Description Xynet.947
It is a dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed. The virus has a bug - while installing memory resident it tries to patch MCB list, but fails. As a result it may halt the system. The virus searches for memory resident anti-virus monitors and halts the system if one is found.
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Rasek.1310
Description Rasek.1310
This is a dangerous memory resident multipartite encrypted virus. While executing an infected file it writes itself to the MBR of the hard drive and hooks INT 13h, 12h. By hooking INT 13h this virus releases the stealth mechanism on reading the infected MBR. It also writes a trojan program to the floppy disk boot sectors. That program erases the hard drive FAT while loading from that floppy. Sometimes the virus also erases the FAT on loading from infected MBR.
By hooking INT 21h the virus infects COM and EXE files that are executed, it writes itself to the end of the files. The virus contains the text string "AND.COM" and does not infect the files that contains that string in their names (COMMAND.COM). The virus also contains the text strings:
RASEK v1.1,from LA CORUÑA(SPAIN).Jan93
Rasek.1489
Description Rasek.1489
This is a dangerous memory resident multipartite encrypted virus. While executing an infected file it writes itself to the MBR of the hard drive and hooks INT 13h, 12h. By hooking INT 13h this virus releases the stealth mechanism on reading the infected MBR. It also writes a trojan program to the floppy disk boot sectors. That program erases the hard drive FAT while loading from that floppy. Sometimes the virus also erases the FAT on loading from infected MBR.
By hooking INT 21h the virus infects COM and EXE files that are executed, it writes itself to the end of the files. The virus contains the text string "AND.COM" and does not infect the files that contains that string in their names (COMMAND.COM). The virus also contains the text strings:
RaseK v2.1,from LA CORUÑA(SPAIN).Mar93
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