crackme1 Walkthrough

reference

crackmes.de's crackme1 by midi

Scan with die:

Execute the binary:

Load the binary to ghidra, and enumerate existed functions:

Show references to fopen keyfile:

FUN_00401344:

The program will:

1. fopen lookhere.key
2. GetDriveTypeA
3. check _DAT_0040200c

The fastest method is patching the step 3:

Decompilation of the function:

proof

Patch, save and export:

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• GetDriveTypeA: