Yes, I discovered the virus years ago. I thought I posted a cleaned version somewhere is not on my site somewhere.
Bill Degnan twitter: billdeg vintagecomputer.net On Oct 20, 2016 8:17 PM, "Fred Cisin" <ci...@xenosoft.com> wrote: > On Wed, 19 Oct 2016, Sam O'nella wrote: >> >>> Does that archive on classiccmp.org have the infected images removed or >>> cleaned? (Just curious as I remember this came up in a couple other >>> forums >>> that I think one or two of the images did have a virus). >>> >> >> an 8080/Z80 compatible CP/M virus??? >> Or are you talking about a virus in some sort of MS-DOS image? >> Or an MS-DOS boot sector virus that wrote itself onto the "boot sector" >> of a non-MS-DOS format? >> > > OK, answering my own query, I did a trivial amount of GOOGLEing, and found > discussion that said that "Stoned" was found in TD0 images of PC-7000 > MS-DOS 2.11. > > That is an EXTREMELY common MS-DOS boot sector virus. And was apparently > in an image of an MS-DOS disk. However, some "anti-virus" software would > not find it, since it might ONLY look in the boot sector for that virus, > not within an archive image. > Many other "anti-virus" software will get a lot of false positives, since > it is only looking for a short "signature" - meaning that the staff in the > anti-virus company extracts a short sequence from an infected disk, and > then triggers whenever it encounters that particular sequence of bytes. > > Are they skilled enough to extract a significant "signature" that would > only occur in that virus, or do they grab a random sequence within the > infected disk? > > > In any case, it is NOT likely to be a problem for any sort of Cromemco > disk. And the discussion that GOOGLE turned up was specifically referring > to MS-DOS 2.11 of PC-7000. > Do NOT boot an 80x86 machine from one of those images. > BTW, ANY versions of MS-DOS 2.11 or 3.31 should be saved! Even if it > means manually "disinfecting". Those were the most customized versions of > MS-DOS, and included 3.5" disk formats that were not PC-DOS compatible, > special versions of MODE.COM (for non-80x25 screens, and laptop > externals), etc. > > > -- > Grumpy Ol' Fred ci...@xenosoft.com >