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- ________________________________________________________________
- THE COMPUTER INCIDENT ADVISORY CAPABILITY
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- CIAC
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- ADVISORY NOTICE
- ________________________________________________________________
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- The nVIR virus has recently infected significant numbers of Macintosh
- systems at several DOE sites. There are different strains of this virus. Each
- strain causes somewhat different symptoms such as printing errors on laser
- printers, slow system response time, or unpredictable system crashes.
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- The exact mechanisms by which nVIR spreads have recently been determined.
- Removable media (e.g., disks) are the primary means by which nVIR spreads.
- Thus, if a disk used in an infected Macintosh is removed and inserted in a
- second Macintosh, the other machine will become infected if any application on
- that disk is executed in the second machine. In addition, any method used to
- transfer programs between Macintoshes will spread the nVIR virus. This
- includes transfer via shareware over a network. However, nVIR cannot spread
- via a print network's hardware.
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- nVIR is initially difficult to detect. It spreads quickly and frequently
- affects backups before eradication procedures can be initiated.
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- Disks brought in from off-site are the most common source of nVIR infections.
- Unauthorized copies of commercial software brought from off-site or exchanged
- within a site also present a substantial risk of nVIR infection. Vendor
- demonstration programs are another suspected source of the nVIR virus.
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- We urge you first of all to review your site's policy on sharing disks and
- using and distributing non-licensed software. Another essential damage
- prevention measure is to have good anti-viral software available at your site.
- CIAC recommends that you test any suspect disk with Disinfectant 1.2, a
- freeware package which also eradicates viruses. Virus Detective, a
- shareware package, also tests disks to see if they are clean of nVIR and
- several other viruses. Although it is tedious to use, Gatekeeper, another
- shareware program, will provide several protection mechanisms. It is
- important to educate users about the importance of using only software
- from trusted sources to reduce the possibility of virus infections. Finally,
- CIAC recommends that your site uses dedicated machines for on-site vendor
- demonstrations.
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- For further information or to obtain copies of Disinfectant, Virus Detective
- and/or Gatekeeper, contact CIAC at (415) 422-8193 or (FTS) 532-8193. CIAC's
- e-mail address is:
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- CIAC@tiger.llnl.gov
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