Home Did you know ? Installing Apktool for Reverse Engineering Android Apps

Installing Apktool for Reverse Engineering Android Apps

by Unallocated Author

Apktool is used for reverse engineering 3rd party Android apps. Debugging is made easier with Apktool’s ability to decrypt properties to their practically original forms. By rebuilding the properties post alteration, a user can gradually debug a smali code.

Kali lists the features of apktool:

  • decoding resources to nearly original form (including resources.arsc, XMLs and 9.png files) and rebuilding them
  • smali debugging: SmaliDebugging
  • helping with some repetitive tasks

Installation for apktool is simple with Linux (as always). Get the most recent version of apktool and run the following commands:

  • cd ~/
  • mkdir apktool
  • wget https://raw.githubusercontent.com/iBotPeaches/Apktool/master/scripts/linux/apktool
  • wget https://bitbucket.org/iBotPeaches/apktool/downloads/apktool_2.1.1.jar
  • mv apktool_2.1.1.jar apktool.jar
  • chmod +x apktool*
  • sudo mv apktool* /usr/local/bin/

A wide variety of commands are available in apktool, but the trick is learning the tool before using it. Play around with your phone and computer – test out different things. Spend time researching tutorials and step by step guides. Take it gradually; start out by learning the basics.

Kali lists apktool’s basic commands:

d[ecode] [OPTS] <file.apk> [<dir>]

Decode <file.apk> to <dir>.

OPTS:

  • -s, –no-src
    • Do not decode sources.
  • -r, –no-res
    • Do not decode resources.
  • -d, –debug
    • Decode in debug mode. Check project page for more info.
  • -b, –no-debug-info
    • Baksmali — don’t write out debug info (.local, .param, .line, etc.)
  • -f, –force
    • Force delete destination directory.
  • -t <tag>, –frame-tag <tag>
    • Try to use framework files tagged by <tag>.
  • –frame-path <dir>
    • Use the specified directory for framework files
  • –keep-broken-res
    • Use if there was an error and some resources were dropped, e.g.: “Invalid config flags detected. Dropping resources”, but you want to decode them anyway, even with errors. You will have to fix them manually before building.

Remember: apktool is not meant for illegal activity. Do not abuse its use for selfish means (and if you do, don’t get caught). In conclusion, this tool is useful for a variety of different things. Don’t be afraid to explore in more depth.

You may also like

Latest Hacking News

Privacy Preference Center

Necessary

The __cfduid cookie is used to identify individual clients behind a shared IP address and apply security settings on a per-client basis.

cookie_notice_accepted and gdpr[allowed_cookies] are used to identify the choices made from the user regarding cookie consent.

For example, if a visitor is in a coffee shop where there may be several infected machines, but the specific visitor's machine is trusted (for example, because they completed a challenge within your Challenge Passage period), the cookie allows Cloudflare to identify that client and not challenge them again. It does not correspond to any user ID in your web application, and does not store any personally identifiable information.

__cfduid, cookie_notice_accepted, gdpr[allowed_cookies]

Advertising

DoubleClick by Google refers to the DoubleClick Digital Marketing platform which is a separate division within Google. This is Google’s most advanced advertising tools set, which includes five interconnected platform components.

DoubleClick Campaign Manager: the ad-serving platform, called an Ad Server, that delivers ads to your customers and measures all online advertising, even across screens and channels.

DoubleClick Bid Manager – the programmatic bidding platform for bidding on high-quality ad inventory from more than 47 ad marketplaces including Google Display Network.

DoubleClick Ad Exchange: the world’s largest ad marketplace for purchasing display, video, mobile, Search and even Facebook inventory.

DoubleClick Search: is more powerful than AdWords and used for purchasing search ads across Google, Yahoo, and Bing.

DoubleClick Creative Solutions: for designing, delivering and measuring rich media (video) ads, interactive and expandable ads.

doubleclick

Analytics

The _ga is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.

The _gat global object is used to create and retrieve tracker objects, from which all other methods are invoked. Therefore the methods in this list should be run only off a tracker object created using the _gat global variable. All other methods should be called using the _gaq global object for asynchronous tracking.

_gid works as a user navigates between web pages, they can use the gtag.js tagging library to record information about the page the user has seen (for example, the page's URL) in Google Analytics. The gtag.js tagging library uses HTTP Cookies to "remember" the user's previous interactions with the web pages.

_ga, _gat, _gid