знать врага
http://hxdef.czweb.org/ > knowhow > Advanced Windows 2000 Rootkits Detection
...да и все остальныйе прочитать, я так думаю, не помешает.
"If you know the enemy and know yourself, you need not fear the result of a
hundred battles. If you know yourself but not the enemy, for every victory
gained you will also suffer a defeat. If you know neither the enemy nor
yourself, you will succumb in every battle."
-Sun Tzu, Art of War