# GWTMap | Tool to help map the attack surface of Google Web Toolkit **URL:** \ **Category:** Tools & Scripts\ **Tags:** tools, programming\ **Created:** [November 12, 2020, 12:21pm UTC](https://onehack.st/t/gwtmap-tool-to-help-map-the-attack-surface-of-google-web-toolkit/162331 "2020-11-12T12:21:07Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![TheStrength](https://onehack.st/user_avatar/onehack.st/thestrength/32/46753_2.png) [@TheStrength](https://onehack.st/u/TheStrength)\ **Post date:** [November 12, 2020, 12:21pm UTC](https://onehack.st/t/gwtmap-tool-to-help-map-the-attack-surface-of-google-web-toolkit/162331/1 "2020-11-12T12:21:07Z")
![image](https://onehack.st/uploads/default/original/3X/1/f/1fdef69a93043ab26937f169d7bd0106100acdee.jpeg) GWTMap is a tool to help map the attack surface of Google Web Toolkit (GWT) based applications. The purpose of this tool is to facilitate the extraction of any service method endpoints buried within a modern GWT application’s obfuscated client-side code, and attempt to generate example GWT-RPC requests payloads to interact with them. More information can be found here: [https://labs.f-secure.com/blog/gwtmap-reverse-engineering-google-web-toolkit-applications](https://labs.f-secure.com/blog/gwtmap-reverse-engineering-google-web-toolkit-applications). **Requirements** The script requires `Python3`, `argparse`, and `requests` to run. They can be installed using the following command: ```auto python -m pip install -r requirements.txt ``` **Usage** **Help** ```auto $ ./gwtmap.py -husage: gwtmap.py [-h] [--version] [-u ] -F [-b ] [-p ] [-c ] [-f ] [--basic] [--rpc] [--probe] [--svc] [--code] [--color] [--backup [DIR]] [-q]Enumerates GWT-RPC methods from {hex}.cache.js permutation filesArguments: -h, --help show this help message and exit --version show program's version number and exit -u , --url URL of the target GWT {name}.nocache.js bootstrap or {hex}.cache.js file -F , --file path to the local copy of a {hex}.cache.js GWT permutation file -b , --base specifies the base URL for a given permutation file in -F/--file mode -p , --proxy URL for an optional HTTP proxy (e.g. -p http://127.0.0.1:8080) -c , --cookies any cookies required to access the remote resource in -u/--url mode (e.g. 'JSESSIONID=ABCDEF; OTHER=XYZABC') -f , --filter case-sensitive method filter for output (e.g. -f AuthSvc.checkSession) --basic enables HTTP Basic authentication if require. Prompts for credentials --rpc attempts to generate a serialized RPC request for each method --probe sends an HTTP probe request to test each method returned in --rpc mode --svc displays enumerated service information, in addition to methods --code skips all and dumps the 're-formatted' state of the provided resource --color enables console output colors --backup [DIR] creates a local backup of retrieved code in -u/--url mode -q, --quiet enables quiet mode (minimal output)Example: ./gwtmap.py -u "http://127.0.0.1/example/example.nocache.js" -p "http://127.0.0.1:8080" --rpc ``` **Usage** Enumerate the methods of a remote application via it’s bootstrap file and create a local backup of the code (selects permutation at random): ```auto ./gwtmap.py -u http://192.168.22.120/olympian/olympian.nocache.js --backup ``` Enumerate the methods of a remote application via a specific code permutation ```auto ./gwtmap.py -u http://192.168.22.120/olympian/C39AB19B83398A76A21E0CD04EC9B14C.cache.js ``` Enumerate the methods whilst routing traffic through an HTTP proxy: ```auto ./gwtmap.py -u http://192.168.22.120/olympian/olympian.nocache.js --backup -p http://127.0.0.1:8080 ``` Enumerate the methods of a local copy (a file) of any given permutation: ```auto ./gwtmap.py -F test_data/olympian/C39AB19B83398A76A21E0CD04EC9B14C.cache.js ``` Filter output to a specific service or method: ```auto ./gwtmap.py -u http://192.168.22.120/olympian/olympian.nocache.js --filter AuthenticationService.login ``` Generate RPC payloads for all methods of the filtered service, with coloured output ```auto ./gwtmap.py -u http://192.168.22.120/olympian/olympian.nocache.js --filter AuthenticationService --rpc --color ``` Automatically test (probe) the generate RPC request for the filtered service method ```auto ./gwtmap.py -u http://192.168.22.120/olympian/olympian.nocache.js --filter AuthenticationService.login --rpc --probe ``` **Complete Examples** Generate an RPC request for the method “testDetails”, and automatically probe the service ```auto $ ./gwtmap.py -u http://192.168.22.120/olympian/olympian.nocache.js --filter TestService.testDetails --rpc --probe ___| /__ __| | _ | / | |/ | _ | | | | / | | |___ ___/____ | _/_/ _| _| _| _/ _ _| version 0.1[+] Analysing====================http://192.168.22.120/olympian/olympian.nocache.jsPermutation: http://192.168.22.120/olympian/4DE825BB25A8D7B3950D45A81EA7CD84.cache.js+ fragment : http://192.168.22.120/olympian/deferredjs/4DE825BB25A8D7B3950D45A81EA7CD84/1.cache.js+ fragment : http://192.168.22.120/olympian/deferredjs/4DE825BB25A8D7B3950D45A81EA7CD84/2.cache.js[+] Module Info====================GWT Version: 2.9.0Content-Type: text/x-gwt-rpc; charset=utf-8X-GWT-Module-Base: http://192.168.22.120/olympian/X-GWT-Permutation: 4DE825 BB25A8D7B3950D45A81EA7CD84RPC Version: 7RPC Flags: 0[+] Methods Found====================----- TestService -----TestService.testDetails( java.lang.String/2004016611, java.lang.String/2004016611, I, D, java.lang.String/2004016611 )POST /olympian/testService HTTP/1.1Host: 192.168.22.120Content-Type: text/x-gwt-rpc; charset=utf-8X-GWT-Permutation: 4DE825BB25A8D7B3950D45A81EA7CD84X-GWT-Module-Base: http://192.168.22.120/olympian/Content-Length: 2627|0|10|http://192.168.22.120/olympian/|67E3923F861223EE4967653A96E43846|com.ecorp.olympian.client.asyncService.TestService|testDetails|java.lang.String/2004016611|D|I|§param_Bob§|§param_Smith§|§param_"Im_a_test"§|1|2|3|4|5|5|5|7|6|5|8|9|§32§|§76.6§|10|HTTP/1.1 200//OK[1,["Name: param_Bob param_SmithnAge: 32nWeight: 76.6nBio: param_"Im_a_test"n"],0,7][+] Summary===== ===============Showing 1/5 ServicesShowing 1/25 Methods ``` ## GitHub: > **[GitHub - FSecureLABS/GWTMap](https://github.com/FSecureLABS/GWTMap)** > > Contribute to FSecureLABS/GWTMap development by creating an account on GitHub.