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nmap
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nselib
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psexec
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The files in this directory are the data files required for smb-psexec.nse. The .lua files are configurations. Each of these defines a profile for a psexec execution. nmap_service.exe is a program that facilitates the operation of smb-psexec.nse. It is uploaded to the remote host and runs the programs it's directed to run, redirecting their output to a file. This file is then downloaded by the script and displayed to the user. When Nmap released version 5.20, it was discovered that some over-zealous antivirus software tagged this program as spyware[1]. For that reason, when stored on the host machine, it is now encoded by xoring every byte of the file with 0xFF. When uploaded to a target machine, it is decoded in-stream. This prevents programs on the host machine from tagging it as malicious, but does not prevent the target from detecting it (which is arguably a good thing). The encoder.c program reads a program from stdin, encodes it by xoring with 0xFF, and writes it to stdout. [1] http://seclists.org/nmap-dev/2010/q1/198