Opal Family
Description Opal Family
These are harmless nonmemory resident parasitic viruses. They search for .COM files and write themselves to the end of the file. The viruses contain the text strings:
"Opal.390": *.COM OpalSoft
"Opal.683": *.COM OpalSoft 10.3.1994 v1.2C
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Macro.Word97.Mimir
Description Macro.Word97.Mimir
This is a very dangerous macro virus. The virus uses destructive way of infection. Instead of copying just macro programs to infect other documents (as most of other macro viruses do), this virus overwrites whole documents while infecting them - it copies infected document to the victim ones as disk files. As a result the virus destroys original documents, and they cannot be recovered.
The virus contains one macro Document_Open and activates at the same moment an infected document is loaded by MS Word. The virus gets names of four last recently edited files and overwrites them. Then it searches for files with .DOC filename extension on the C: drive including subfolders, and overwrites them in the same way. As a result all documents on the C: drive may be destroyed.
To spread itself the virus also uses the MS Outlook mail and sends infected messages to the Internet. It gets all contacts from MS Outlook contacts folder and send each of them a message with attached infected document, the body of message has one line of text:
Some nice jokes you got to read!! :))
If the system date is set to April 9th 1999 the virus deletes the C:IO.SYS file and displays the message box:
Oooops
..Sorry..MIMIR has infected your PC..
Macro.Word97.Minimal
Description Macro.Word97.Minimal
This is a silly Word97 macro virus. It contains only one macro "autoopen". It infects the system on opening an infected file and writes itself to the documents on opening them.
The virus contains the commented string:
Vesselin Bontchev
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