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harx's Introduction

Description

HAR eXtractor.

This utility was developed to assist security analysts working with HTTP Archive (HAR) files to list and extract the contained objects.

More information about the HTTP Archive (HAR) format can be read here: https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HAR/Overview.html

Disclaimer

  • This code is a proof of concept only and is not warranted for production use
  • No support is available for this software
  • This code has not been audited for security issues
  • Use entirely at your own risk

Requirements

Python 2.7

  • Python Magic Module: pip install python-magic

For quick module installation:

pip install -r requirements.txt

Usage

usage: harx.py [-h] [-c CSV] [-l] [-x EXTRACT] [-xa] [-d DIRECTORY] har_file

positional arguments:
  har_file

optional arguments:
  -h, --help            show this help message and exit
  -c CSV, --csv CSV     Save object list to [CSV]
  -l, --list            List objects
  -x EXTRACT, --eXtract EXTRACT
                        eXtract object matching index from -l output
  -xa, --eXtractAll     eXtract all objects
  -d DIRECTORY, --directory DIRECTORY
                        [DIRECTORY] to extract files to

Example Execution

List objects

./harx.py -l ek_traffic.har
[  0] [2015-08-31T17:56:12.104071Z] [   GET] [                    text/plain] [Size:       14] [http://www.msftncsi.com/ncsi.txt]
[  1] [2015-08-31T17:56:46.994169Z] [   GET] [                     text/html] [Size:     1305] [http://api.bing.com/qsml.aspx?query=go&maxwidth=32765&rowheight=20&sectionHeight=160&FORM=IESS02&market=en-US]
[  2] [2015-08-31T17:56:47.544066Z] [   GET] [                     text/html] [Size:     1346] [http://api.bing.com/qsml.aspx?query=google&maxwidth=32765&rowheight=20&sectionHeight=160&FORM=IESS02&market=en-US]
[  3] [2015-08-31T17:56:47.807992Z] [   GET] [                     text/html] [Size:     1369] [http://api.bing.com/qsml.aspx?query=google.c&maxwidth=32765&rowheight=20&sectionHeight=160&FORM=IESS02&market=en-US]
...
[209] [2015-08-31T18:01:22.238266Z] [  POST] [     application/ocsp-response] [Size:     1336] [http://gtssl-ocsp.geotrust.com/]
[210] [2015-08-31T18:01:23.122156Z] [  POST] [     application/ocsp-response] [Size:     1453] [http://ocsp.verisign.com/]
[211] [2015-08-31T18:01:23.248269Z] [  POST] [     application/ocsp-response] [Size:     1762] [http://ocsp.verisign.com/]
[212] [2015-08-31T18:01:23.442410Z] [  POST] [     application/ocsp-response] [Size:     1725] [http://sf.symcd.com/]

Extract object matching index from -l output

./harx.py -x 137 ek_traffic.har
[137] [       41keG5PBKbL-274x300.jpg] [Size:  32.5KiB] [3b58d7efe887212e2b1b631bdd417034] [                    image/jpeg] [http://example.com/wp-content/uploads/2015/06/41keG5PBKbL-274x300.jpg]

Extract all objects to a folder

./harx.py -xa -d ek_traffic_analysis ek_traffic.har
[  0] [                      ncsi.txt] [Size:    14.0B] [cd5a4d3fdd5bffc16bf959ef75cf37bc] [                    text/plain] [http://www.msftncsi.com/ncsi.txt]
[  1] [                     qsml.aspx] [Size:   110.0B] [b0c846fc56e41d5eec6adf8e92a59fef] [      application/octet-stream] [http://api.bing.com/qsml.aspx?query=go&maxwidth=32765&rowheight=20&sectionHeight=160&FORM=IESS02&market=en-US]
[  2] [                     qsml.aspx] [Size:   113.0B] [e78f910e1a340736b2e5e81aea8d0880] [      application/octet-stream] [http://api.bing.com/qsml.aspx?query=google&maxwidth=32765&rowheight=20&sectionHeight=160&FORM=IESS02&market=en-US]
[  3] [                     qsml.aspx] [Size:   128.0B] [307f529a949ee293872b226dd7c2668c] [      application/octet-stream] [http://api.bing.com/qsml.aspx?query=google.c&maxwidth=32765&rowheight=20&sectionHeight=160&FORM=IESS02&market=en-US]
...
[209] [  gtssl-ocsp.geotrust.com.file] [Size:   1.3KiB] [09a6f239fd0bd44d43a739b64253057b] [      application/octet-stream] [http://gtssl-ocsp.geotrust.com/]
[210] [        ocsp.verisign.com.file] [Size:   1.4KiB] [45f667114e55de8ee7c8bfc0bb0e7744] [      application/octet-stream] [http://ocsp.verisign.com/]
[211] [        ocsp.verisign.com.file] [Size:   1.7KiB] [eadb300a3afed5b2cb378cbb8548386a] [      application/octet-stream] [http://ocsp.verisign.com/]
[212] [             sf.symcd.com.file] [Size:   1.7KiB] [516235e7ad11627ed89b9b8248ee89b7] [      application/octet-stream] [http://sf.symcd.com/]

harx's People

Contributors

morsch avatar ruanmuller avatar

Stargazers

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Watchers

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Forkers

kobrien-novetta morsch jasonfrancis i5anoff dillatroit eh7pg78i shoorick lennylip

harx's Issues

My use case

Hello,

First of all, I'd like to say that this is a great little script which helped me a lot on my current project. Would love to see it starred more.

I have a couple of suggestions, fixes that I had to make to make it work the way I wanted.

By default this script exports everything in one folder when using -xa flag, which is useful in some cases, but not when you're trying to see the structure of a webpage or something similar. Therefore I needed to add folder support, so that every resource that is located in the HAR file is exported to its folder according to original path.

Second thing I noticed was that some of the plain text files (json, js, txt, etc.) were incorrectly exported, meaning they'd be binary garbled files, which was happening because getB64Decode method was being called on all of the resources regardless of its type.

So I changed the processObject method to look like this:

def processObject(idx, content, filename, path):
    """Common Object Processing"""

    f = re.sub(r'https?:\/\/', '', re.sub(r'\?.*', '', filename))
    dest = path + f

    if not os.path.exists(os.path.dirname(dest)):
        os.makedirs(os.path.dirname(dest))

    if dest.endswith('/'):
        dest = dest + 'index.html'
    
    data = content
    smth, ext = os.path.splitext(dest)
    if not (ext.endswith('json') or ext.endswith('js') or ext.endswith('asp') or ext.endswith('aspx') or ext.endswith('txt') or ext.endswith('css')):
        data = getB64Decode(content)

    writeFile(dest, data)
    md5 = getMD5(dest)
    size = getSize(dest)
    mime = getMagic(dest)

    print "[" + str(idx).rjust(3, " ") + "] " +\
    	"[" + f[0:30].rjust(30, " ") + "] " +\
    	"[Size: " + size.rjust(8, " ") + "] "+\
    	"[" + md5 + "] [" + mime.rjust(30, " ") + "] " +\
    	"[" + objectList[idx]['url'] + "]"

    return True

This helped me resolve all of the issues I had. Hope this helps somebody in the future. Please note that this is the first time I ever touched Python code, so it may not look great.

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