'LINK' Download Ghidra On Linux

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Justina Sisti

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Jan 25, 2024, 5:22:56 AM1/25/24
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Ghidra is a cross-platform reverse-engineering and binary analysis tool, with recent versions including support for dynamic analysis. I want to try using it as a replacement for IDA Pro in reverse-engineering of Win32 binaries, but hit bugs related to address space detection when running gdbserver with Wine (ghidra#4534).

download ghidra on linux


Download ✦✦✦ https://t.co/oXQFC6XRUa



Here's where things start to go wrong. After creating the trace record, Ghidra will start throwing out error popups about trying to access invalid address space. Github issue ghidra#4534 has some of the nitty-gritty details on what's going on, but in summary Ghidra depends on the GDB command info proc mappings to figure out what it can peek at, and GDB doesn't implement that command for Windows targets.

Next we need the Linux PID. Luckily(?) Wine allows Win32 binaries to directly invoke Linux syscalls via the INT 0x80 instruction, so a straightforward approach is to inject a linux_getpid() function into the target process's address space and then use GDB's call command to run it.

I'm trying to reverse engineer a linux kernel module (kernel version 4.19).Ghidra does recognize correctly all function names such as: open, misc_register etc, but it cannot determinate their exact signatures.

This is a common (and really annoying) behavior for Java apps. They adjust their own window size after mapping their top level window (thus undoing or overriding any window manager positioning). In this case, you can specify a different default position and geometry (on line 22 of /.ghidra/.ghidra_9.1_DEV/FrontEndTool.xml after running the program at least once), but I don't know of any way to make it honor the positioning set by sane window managers.

Update: I installed Eclipse and PyDev in Linux and my code works now. This confirms it was an issue setting up the Python/Jython paths. I would still like to know how to import ghidra.jar into jython so that I can use the command line in the future. Any help here would be greatly appreciated.

I am making a ghidra project on Linux. I am using a Ghidra jar and jython to code my application. I am adding ghidra to my path with system.path.append() and I am running my program withjython main.py.

when I reach ghidraProject.createProject(). I investigated the source and I found that the error occurs when Java tries to make a url from a string. I know Ghidra has a protocol handler which should be handling the protocol "ghidra". I assume Java doesn't register the protocol handler somehow. I tried Handler.registerHandler() with no luck.

which runs through various initialization steps that the overall Ghidra code assumes to have happened when being executed, one of them being the setup for the ghidra:// protocol handler.Specifically the call to ghidra.framework.protocol.ghidra.Handler.registerHandler() happens inside ghidra.ProjectInitializer#run.

Next, you should start Ghidra in order to associate the JDK with it, now close it, then start Eclipse. In Eclipse, install the GhidraDev extension from the archive which is found in ghidra_9.1-BETA_DEV/Extensions/Eclipse.

In conclusion, creating my first Ghidra script wasn't that hard and once I've figured out how to setup Eclipse and link it properly the development experience was a bliss. I hope more and more people will adopt Ghidra and contribute to it. Some Ghidra trainings and exercises can be found in ghidra_9.1-BETA_DEV/docs.

The eventbrite page is here: -u-reverse-engineering-with-ghidra-tickets-109681391996 - we will be releasing the videos of the classes as well so you will still be able to access the material even if you're not present for the actual class.

The Ghidra Server has been designed to support many possible user authentication modes:

  • No authentication - any user which has been added to the server may connect without password or credentials.

  • Local Ghidra password (-a0) - passwords associated with each user added to the server are maintained in the users file located within the repositories directory. The user will be prompted for this password when connecting to the server. The default password changeme is used when a user is first added or when the user is reset (see Server Administration). This default password must be changed by the user to avoid its expiration.

  • Active Directory via Kerberos (-a1) - user authentication isperformed against your local Active Directory system using Kerberos to do so. The -dargument is required to specify the domain name of your Active Directory system.It is also possible to authenticate against your Active Directory system using LDAP. See theLDAP example when using JAAS -a4 mode.

  • PKI authentication (-a2) - user authentication is performed using PKI user certificates. When using this mode, the distinguished name (DN) for each user must beassociated with each server User ID (see Server Administration). In addition, each user must configure Ghidra with the location of their signing key/certificate keystore file (see PKI Certificates for more information). Please note that each user's certificate must be issued by a trusted certificate authority which has been properly added to the Ghidra Server's cacerts file. See Managing PKI Certificate Authorities for more information. In an attempt to simplify the determination of user DN's, a log file (UnknownDN.log) records user DNs which are unknown. After adding a user to the server, ask the user to attempt a login using their PKCS certificate. This should result in their DN being recorded to this log file. The server administrator may now copy the appropriate DN from this log file when assigning the DN for a user.

  • JAAS - Java Authentication and Authorization Service (-a4) - user authentication is delegated to the JAAS subsystem. The -jaas argumentis required to specify the JAAS config file. The JAAS config file supplied (server/jaas.conf)contains various example configurations which may be used to establish an 'auth' configuration section. None of the example configurations use the 'auth' name so they will be ignored by default.JAAS is architected similar to Linux/Unix PAM, where a named authentication configuration is possiblycomposed of several different modules. Ghidra's support of JAAS only handles single simpleJAAS modules that requests the name and password from the user.Some known JAAS login modules:
    • com.sun.security.auth.module.LdapLoginModule - allows authentication to an LDAP server. Thereis an example of using this module to authenticate against an Active Directory system in thejaas.conf file.
    • net.sf.jpam.jaas.JpamLoginModule - (Linux/Unix server only) allows authentication againstthe local PAM configuration. You will need to download JPAM from SourceForce and install thelibraries in the necessary locations. See the example in the jaas.conf file.
    • ghidra.server.security.loginmodule.ExternalProgramLoginModule - spawns an externalprogram for each authentication request, and uses the external program's exit code as the indicatorof successful authentication.There is an example (and non-useful) implementation of an external authenticator provided withthe Ghidra instalation called server/jaas_external_program.example.sh.This login module strives to be compatible with Apache's mod_authnz_external API, and you shouldbe able to use any mod_authnz_external authenticator with Ghidra.The external program is fed the username\n and password\n on its STDIN (ie. two text lines).The external authenticator needs to exit with 0 (zero) error level if the authentication was successful, or a non-zero error level if not successful.
    • com.sun.security.auth.module.Krb5LoginModule - not recommended - this login moduleis used in the -a1 Active Directory via Kerberos authentication mode, and as such you should use it that way.

  • Use of an SSH pre-shared key (-ssh) is supported as an alternate form of authentication when using Local Ghidra password (-a0).This SSH authentication is currently supported by the Headless Analyzer only. See SSH User Authentication for configuration details.

See jaas.conf for examples and suggestions. It is the system administrator's responsibility to craft their own JAAS configuration directive when using the -a4 mode.

  • -u
    Allows the server login user ID to be specified at time of login for -a0 authentication mode. Without this option, the users client-side login ID will be assumed.

  • -autoProvision
    Enable the auto-creation of new Ghidra Serverusers when they successfully authenticate to the server (-a1 and -a4 modes only).Users removed from the authentication provider (e.g., Active Directory) will need to bedeleted manually from the Ghidra Server using svrAdmin command.

  • -anonymous
    Enable anonymous access support for Ghidra Server and its repositories. Only those repositories which specifically enable anonymous access will be accessible as read-only to an anonymous user.

  • -ssh
    Enable SSH as an alternate form of authentication when using -a0 authentication mode.

(Back to Top) Running Ghidra Server on Microsoft WindowsServer Scripts (located within the server subdirectory)
  • svrInstall.bat
    installs server as service (ghidraSvr)

  • svrUninstall.bat
    removes previously installed server service

  • svrAdmin.bat
    facilitates Ghidra Server administrative commands (see Server Administration)

  • ghidraSvr.bat
    provides a variety of commands for controlling the server whenrunning as a daemon process. When running this script it accepts a single argument which is one of the following commands. Many of these commands are included so that this script may be used for controlling the service.
    • console
      starts server within the current terminal window. console argument may be omitted to allow for double-click execution in this mode.

    • start
      starts the previously installed Ghidra Server service

    • stop
      stops the installed Ghidra Server service which is currently running

    • restart
      stops and restarts the previously installed Ghidra Server service

    • status
      displays the current status of the Ghidra Server (ghidraSvr) service

    NOTE: The above scripts may be run from a CMD window, or by double-clicking the script file from an Explorer window. Other than the console and status operation, elevated privilege is needed to run these commands. As such the user executing these scripts must be a member of the Administrator group and must be run with elevated privilege. If using Windows Vista or newer, the best way to accomplish this is to run the CMD shell using the Run as Administrator action which is available by right-clicking on a command shortcut or batch file. If the CMD shell is run in this manner, the Ghidra Server scripts may then be executed within the shell to run with administrator privilege.

Running Server in Console Window (intended for diagnostic use only) NOTE: Starting the server in console mode is generally intended for diagnostic use only. Extreme care must be taken to ensure that any user who starts the Ghidra Server via this script has full access to all directories and files within the root repository directory.

If the Ghidra Server is not already running, it may be started within a console window by running the ghidraSvr.bat console command. When you wish to terminate the server, use the Ctrl-C key sequence within the server console window and wait for a clean shutdown.

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