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PE File Resource Editor
UPX Unpacker: Additional Functionality
Resource Tuner ships with the UPX Unpacker plug-in. This is a start-up processing plug-in for unpacking files compressed with UPX (http://upx.sourceforge.net). All versions of UPX are supported, from the obsolete early versions (prior to 0.80) up to the latest version 3.0.
When you open a file with Resource Tuner, the UPX Unpacker plug-in detects whether this file is packed with UPX, and then unpacks it automatically. The UPX Unpacker displays lines of messages in the bottom log pane as follows:
The UPX Unpacker also supports unpacking files packed using various UPX scramblers which make UPX-ed files not unpackable: Advanced UPX Scrambler, UPoLyX, UPX Lock, UPX Mutanter, UPX Scrambler, UPX SHIT, and several others. The resulted file will also be saved unpacked. Resource Tuner does not re-pack the previously packed files back to the exact original size.
See also: What are packers?
The UPX Unpacker attempts to recover a file, even when an original PE file header entry is no longer available after unpacking. Previously, losing the PE file header rendered the executable completely inoperable and unrepairable. Now you have good chances to analyze packed malware executables and extract hidden data.
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