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Some of my friends say that their cracked antivirus software updates regularly, and does the job as same as a legitimate software would do. Is this possible? How do they bypass the activation key checker, and do that?

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Why on earth would you even want to do this, when there are plenty of perfectly decent free anti-virus options available? –  Xander May 10 '13 at 15:21
    
it doesn't answer my question. What I wanted to know is, how it works. –  DesirePRG May 10 '13 at 15:22
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That's why I added it as a comment, and not an answer. ;-) –  Xander May 10 '13 at 15:25
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That's like asking if a used needle can deliver a vaccine. I guess the short answer is yes, long answer is your computer risks getting hepatitis. –  BSpiros May 10 '13 at 15:28
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Insufficient information to provide a meaningful answer. –  Mark C. Wallace May 10 '13 at 16:01
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closed as not constructive by NULLZ, Adnan, TildalWave, Gilles, Rory Alsop May 29 '13 at 12:40

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1 Answer

up vote 6 down vote accepted

Bypassing the activation key checker on any software usually isn't a problem. It's a relatively simple task of reverse engineering the binary and making the necessary modifications.

Can a cracked antivirus perform it's job? Yes, most definitely. The problem is that you have no idea what other modifications have been made to the binary in the process of bypassing the DRM. A rootkit or other sorts of malware could have been packaged with the antivirus binary for all you know.

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Local jerk here used a similar scam as a means of passing around RAT software. Brought to you by your local chapter of "Trust-a-Crook". If they'll steal from others, they'll steal from you. –  Fiasco Labs May 11 '13 at 0:10
    
A cracked anti-virus should be unable to download new versions/definitions from the official severs. –  CodesInChaos Oct 15 '13 at 12:05
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