| A polymorphic batch file appears to be a holy grail to some virus writers, perhaps because of how insanely difficult it is to produce one. |
| The new version is polymorphic, meaning it changes its appearance in an attempt to avoid detection. |
| A perennial herb found largely in Europe and the Mediterranean, it is an extremely polymorphic species. |
| None of the fixation indices for polymorphic loci in either species were significantly negative. |
| This could allow the bad guys to more easily run more complex polymorphic and encryption routines. |
| The techniques they describe include polymorphic inline cache and regular expression improvements. |
