https://github.com/TorgoTorgo/ghidra-findcrypt

Ghidra analysis plugin to locate cryptographic constants
https://github.com/TorgoTorgo/ghidra-findcrypt

analysis crypt cryptography findcrypt ghidra ghidra-extension ghidra-findcrypt ghidra-plugin

Last synced: 3 months ago
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Ghidra analysis plugin to locate cryptographic constants

• Host: GitHub
• URL: https://github.com/TorgoTorgo/ghidra-findcrypt
• Owner: TorgoTorgo
• License: gpl-3.0
• Created: 2020-08-08T17:38:48.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2023-06-13T14:34:07.000Z (about 1 year ago)
• Last Synced: 2024-01-22T15:57:39.996Z (5 months ago)
• Topics: analysis, crypt, cryptography, findcrypt, ghidra, ghidra-extension, ghidra-findcrypt, ghidra-plugin
• Language: Java
• Homepage: https://gitlab.com/Torgo/ghidra_findcrypt
• Size: 220 KB
• Stars: 208
• Watchers: 4
• Forks: 22
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• awesome-ida-x64-olly-plugin - ghidra-findcrypt - write of another Ghidra FindCrypt script as an auto analysis module). (Ghidra Plugins)
• awesome-ida-x64-olly-plugin - ghidra-findcrypt - write of another Ghidra FindCrypt script as an auto analysis module). (Ghidra Plugins)

README

        
# Ghidra FindCrypt

![Bug eyed Ghidra looks at complex algorithms](docs/findcrypt_logo.png)

[![Github status](https://github.com/TorgoTorgo/ghidra-findcrypt/actions/workflows/main.yml/badge.svg)](https://github.com/TorgoTorgo/ghidra-findcrypt/actions/workflows/main.yml)

[![Gitlab status](https://gitlab.com/Torgo/ghidra_findcrypt/badges/master/pipeline.svg)](https://gitlab.com/Torgo/ghidra_findcrypt/pipelines/master/latest)

This is a re-write of another [Ghidra FindCrypt](https://github.com/d3v1l401/FindCrypt-Ghidra/) script

as an auto analysis module. It also takes better advantage of the Ghidra

API to label found constants.

## Building

FindCrypt builds like a standard Ghidra module:

```bash

cd FindCrypt

GHIDRA_INSTALL_DIR=/path/to/Ghidra_PUBLIC... gradle

```

This will output a zip in the `FindCrypt/dist/` directory.

Note: Ghidra FindCrypt no longer supports Ghidra versions prior to 9.2 as they

lack the Gson JSON library.

## Installing

You can either build it yourself (see above) or download

a zip from the [Github releases](https://github.com/TorgoTorgo/ghidra-findcrypt/releases) or [GitLab releases](https://gitlab.com/Torgo/ghidra_findcrypt/-/releases)

The extension can be installed into Ghidra like so:

- Extract the zip if downloaded from the release page

- From the Project window hit `File` -> `Install extensions...`

- Click the green plus icon on the top right

- In the file browser that opens, select the zip. In case of the released zip the final zip is inside  `FindCrypt/dist.

- Click OK and restart Ghidra

## Using

Once the script is installed, a new Analysis is added to the Auto Analyze window

called "Find Crypt", it's enabled by default and it's safe to re-run. If you have

an existing file, open the "Analysis" menu in the CodeBrowser tool and click

"Auto Analyze". Select the "Find Crypt" analysis from the list and click Analyze.

Once the analysis is complete, any found crypt constants will be labeled with

the algorithm they're associated with. You can find these labels in the "Labels"

folder in the Symbol Tree window. The labels are prefixed with `CRYPT_` to group

them together.

The analysis will also try to set the datatype for the found constants, but if

a datatype has been applied by another analysis module that other module will

take precedence.

A comment is always placed when a crypt constant is found to tell you the type

and the size of the constant, just in case the datatype wasn't applied.