If you want to do this in a smarter way and can get Angr installed successfully, the 'Decode IOCTLs using Angr' option shown below will use symbolic execution to attempt to recover all IOCTL codes. This is super hacky but can speed things up most of the time. The decompiled function will appear in the output window. To try it in IDA, place your cursor on a function, and execute the plugin. The right-click menu also included a display all defines option which display the CTL_CODE definitions for all IOCTL codes decoded in the current session: If you right click on the first instruction of the function you believe to be the IOCTL dispatcher a decode all options appears, this attempt to decode all IOCTL codes it can find in the function. However, if you need something that will work on x8664 take a look at ida-decompiler: An IDA plugin that attempts to decompile a function.
This will print a table with all decoded IOCTL codes each time a new one is decoded: By right-clicking on a decoded IOCTL code it's possible to mark it as invalid: This will leave any non-IOCTL define based comment contents intact. By right-clicking on a potential IOCTL code a context menu option can be used to decode the value, alternatively Ctrl+Alt+D can be used.
Win_driver_plugin - A tool to help when dealing with Windows IOCTL codes or reversing Windows driversĪn IDA Pro plugin to help when working with IOCTL codes or reversing Windows drivers. In order to ignore collisions, simply edit this file by removing the first few comments (lines that start with ' ') and re-run sigmake.
When an error occurs an EXC (.exc) file is created. The problem with this is that sometimes collisions will exist for signatures since the method Hex-Rays uses is not fool proof. sig file usable by IDA with the use of sigmake. The final stage in creating a signature file involves converting the generated PAT file into a. Using one of the tools (plb/pcf/pelf) (provided here for paying customers) you convert all the functions in the library to signatures stored in a PAT file (.pat). The input to the system is a library file (.lib on Windows) from a library of choice while the output is a signature file (.sig) stored under /sig (and only there or else IDA won't find it).
FLIRT elimates the need to analyze functions that could be understood simply by reading documentation or source code from the library it came from and reduces the amount of work required in order to reverse and understand symbol-stripped binaries by a considerable amount. FLIRTDB - A community driven collection of IDA FLIRT signature filesįast Library Identification and Recognition Technology, also known as FLIRT, is IDA's internal symbols identifier that searches through disassembled binaries in order to locate, rename, and highlight known library subroutines.