Challenge #4 Solution - FireEye

the unpacked program. If the UPX unpacked binary youPecks.upx.exe is executed, the Base64 decoding would produce different results due to a different character set being used. The challenge then compares Base64 decoded string against the MD5 hash of the first command line argument at address 0x00401BB0. If the values do not match, the program ... ................
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