-- Ease of Removal
1: Creates new registry entries with consistent data
2: Consistent file contents
3: Consistently named
4: Uses running processes
5: Injects DLLs into running processes
-- Privacy Risks/Security Changes
1: Opens backdoors
2: Mimics legitimate file names
-- Damage/Intrusion/Annoyance
1: Significantly slows down the computer
2: Creates new files
3: Downloads other threats
-- Propagation/Saturation
1: Infects from a link in an email
2: Infects from an email attachment
3: Installed by other infections