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I've cracked the last version of safelock (I'm preparing to upload to ftp) and it uses CRC check in every, but it was very easy, make a BP on createfilea and then analyze the parameter that get the name of the file, if this is the name of your exe the you must change the jump, or NOP, etc... or follow the algorythm and take note of the new CRC and the old and search the EXE for the old, remember that not all soft uses the CRC standard. Normally, the crc generated by the programmer is in the end of the file, normally, in other is in a crypted file, etc...
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