Alien.1356
Description Alien.1356
This is a dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself at the end of COM and EXE files that are accessed. It contains the internal text string:
COM EXE com exe OVL
Depending of system time it overwrites the files by strings:
ALIEN 1.0 written by P.K. on April 93 Good Luck !!!
Check other viruses! Be aware! Use Antiviral Software
Russel Family
Description Russel Family
These are memory resident encrypted parasitic viruses. They hook INT 21h and write themselves to the end of COM and EXE files that are accessed.
"Russel.1200,1235" are the dangerous viruses, they also hook INT 13h and sometimes disable writing to the disks ("Russel.1200"), or write to disk instead of reading ("Russel.1235").
"Russel.3072" is dangerous polymorphic virus. It deletes the CHKLIST.MS file, and contains the text strings:
CHKLIST.MS
RUSSEL FARADAY
Rust.1710
Description Rust.1710
This is a relatively harmless memory resident parasitic virus. It hooks INT 21h, and writes itself to the end of COM and EXE files that are loaded into the memory. From the 19th of any month, before infecting a file, the virus buzzes the speaker. This virus contains the text:
(C) Dialogue, Rust. 1990
While installing into the memory, the virus allocates a block of memory, fixes the MCB list, copies itself there, sets the INT 21h vector to the value 0000:0200, and writes, to the address 0000:0200, the Jmp-Virus command (FAR JMP) that brings the control to the virus INT 21h handler. Apparently, by these actions, the virus tries to bypass some resident anti-virus monitors.
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