Hello, UPXPR101 is a dedicated patcher for UPX version 1.01. It will not work on any other version. It has been tested on UPX 1.01 compressed PE EXE files produced by MASM in 32 bit and one compiler and works correctly on both. It patches the EXE header so that the the decompression option does not work. It is aimed at forcing a hacker to manually reconstruct a compressed file before they can modify or infect it. It tests if the file is a normal compressed EXE from UPX 1.01 and will not patch the EXE file if the header is not correct. Note: I don't know the creator, possibly UPX team. This program was taken from www.SuddenDischarge.com Best regards, Anonymz
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upxpr101.zip
Description: Zip compressed data