SMVB.708
Description SMVB.708
These are not dangerous memory resident parasitic viruses. They hook INT 21h and write themselves to the beginning of .COM files that are executed. They contain the text strings:
This Remark is used as an identification
pattern for the Anti-Virus-Utility.
Do not try to change it.
This Remark is used by the anti-virus utility as a pointer
to the end of the Virus.
and:
"Smvb.1023": SmvbVir
"Smvb.1100": ASUIDFMNCVOPSAIUFDNMVCPO
"Smvb.1023" also hooks INT 8 to prevent debugging. "Smvb.1100" hooks INT 16h and tries to change the keys that are entered, but fails. "Smvb.708" hooks INT 17h and changes the symbols that are printed.
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AT-Corp.321
Description AT-Corp.321
This is a harmless memory resident multipartite virus. It hooks INT 13h and writes itself into free space (cave) in EXE-header when such headers are accessed with INT 13h (the corresponding sectors are read/written via INT 13h). The length of the file does not grow while infecting.
It also infects MBR of the hard drive and installs itself memory resident only while booting from infected MBR.
The virus contains the text string:
(c)AT Corp. 1995
AT-Corp.363
Description AT-Corp.363
This is a harmless memory resident parasitic virus. It hooks INT 13h and writes itself into free space (cave) in EXE-header when such headers are accessed with INT 13h (the corresponding sectors are read/written via INT 13h). The length of the file does not grow while infecting.
The virus contains the text string:
(c) AT Corp. 1994
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