Questions tagged [javascript]
JavaScript or JS is an interpreted computer programming language. It was originally implemented as part of web browsers.
67
questions
-1
votes
0answers
22 views
PDF analyse using pdfstreamdumper
New to the world of Reverse engineering, I analysed a PDF through pdfstreamdumper I found the CVE, and payload also found JavaScript.
the JS is obfuscated, I would like to de-obfuscate it to get ...
0
votes
0answers
36 views
Reverse Engineering Javascript - Out of Memory
I found this javascript file on one of those online movie streaming services and was interested in finding out what it does. However, after trying many deobfuscators I am still stuck. A major ...
1
vote
0answers
35 views
How to modify JS with mitmproxy?
I am trying to reverse engineer a heavily obfuscated web application, and I would like to modify the JS to add logging. So far, I've set up mitmproxy, but I can't figure out what the best way to edit ...
0
votes
0answers
26 views
Connect and extract live raw data from bluetooth devices
I recently bought a bunch of bluetooth devices which includes fitness bands, thermometers, room temp. But I've seen that most of them don't appear in the mobile's discoverable list but connects ...
-1
votes
1answer
95 views
De-obfuscate JS code [closed]
I came across a script that converts font files from one type to another (i.e. WOFF to TTF, etc).
I would like to understand it and incorporate some of the code into a personal project. The script ...
1
vote
1answer
185 views
Is it possible to completely reverse this code?
i have this code i'm trying to deobfuscate
https://pastebin.com/g5mHpWE4
I used
https://beautifier.io/ and
http://www.jsnice.org/
but the result is still not good, current code:
https://pastebin.com/...
0
votes
1answer
193 views
How can I deobfuscate this javascript code
I am trying to deobfuscate this javascript code, but I don't know how it was created. Can you please tell me what the mechanism or the function is that generate such characters in javascript?
É=-~-~[]...
1
vote
0answers
61 views
How to hook eval function in node.js
As the eval() function of JavaScript is an evil, I want to hook or monkey-patch eval() function of JavaScript in node.js. I want to intercept all arguments passed in eval() function. Please guide me ...
0
votes
1answer
35 views
What's wrong with my mitm to support rr commands with gdbserver on IDA?
First of here is the gdb remote protocol doc.
The idea of the below script is the following - you enter an actual command (one that will be send as a direct packet see packets) in the gdb window then ...
1
vote
0answers
40 views
Need help reversing .m4t TTML subtitles format
I am currently trying to create subtitles for some proprietary Sony software. Unfortunatly, it only recognizes Sony's own .m4t subtitles format. After some research I found that this subtitles is also ...
0
votes
1answer
688 views
decrypt config.bin file from Huawei B5328 router i have source files
Hello i need somehelp in decrypting the file config.bin generated by the page backup_setting.html from huawei B5328 router , i have access to all files in the router even the www files hosted on the ...
0
votes
0answers
28 views
Detecting what causes edited Javascript file to crash entire browser tab
I'm currently trying to debug a Javascript game that's been made with Haxe 3.4.7.
When I'm trying to override the .js file locally, my entire browser seems to crash, or simply not load. I'm thinking ...
1
vote
0answers
18 views
How to programmatically add HTML DOM breakpoints in chromium?
I've seen from this post about Chromium DevTools that there exists the possibility to add DOM breakpoints. Given that I've a full range of elements to monitor I was trying to find a way to ...
0
votes
0answers
66 views
replace variable references with its values at once in javascript file
I'm trying to de-obfuscate a Javascript file:
Javascript Obfuscated File
I have already de-obfuscated the code but it's still hard to read.
As you can see in the code below there is a huge list of ...
1
vote
1answer
340 views
De-obfuscating code ran through JScrambler 3x via Eval() functions
I am relatively new to JS and de-obfuscation in general and I am having difficulties reversing some complicated JS. I know the code itself is obsfucated via jscrambler 3-4x and therefore is ran ...
1
vote
0answers
91 views
deobfuscating/decompiling extremely complicated javascript [closed]
I am working with some extremely complicated JavaScript. It is around 70,000 lines long and sections of the code look like this
U2xx.l11="0x78920d50";m2xx.r9G="11";b2xx.v3y="0x744ebc37";P2xx.K5h="...
0
votes
0answers
30 views
javascript hook comparisons
Look at this very basic javascript code:
if (s=='abcd')
{
if (s2='cdef')
{
...
}
}
I want to hook all tests: I want to get this:
(s,'==','abcd')
(s2,'==','cdef')
Is there a way ...
1
vote
1answer
139 views
WebSocket debugging in Javascript app gives “401 Unauthorized” [closed]
I'm attempting to reverse engineer a private API used by an Android app that makes use of WebSockets. These requests are made from JavaScript inside a WebView.
I use Charles to intercept both HTTP ...
0
votes
1answer
372 views
How to copy video address from tweet?
Twitter has an option to right-click on a video and "copy video address" but this button seems to be broken as it doesn't copy anything to the clipboard, even after I disable Ghostery/adblock. I ...
0
votes
1answer
290 views
Is v8's --print-bytecode safe?
I just saw this post, and I was wondering if it's safe to get v8 bytecode in that fashion with --print-bytecode.
1
vote
1answer
735 views
Analyzing and deobfuscating complex JS code [duplicate]
I am looking to reverse engineer a very ugly piece of JS found here.
As far as I can tell, this script generates and sets some cookies on my browser that identify it on the site. Deobfuscating it ...
1
vote
1answer
541 views
How do you un-obfuscate JS code that is evaluating your browser environment?
Given this:
<script>var
_0x4c36=['w6rChcKeWsKXw7TCocOlNF8Kw7bCuMKdKsOWTMKjF2A=','V3PClhXDu8OCCMO5WwbCp8KhD8KVw7LDo8KOwr7CiA==','w6saBzVaIwbDk8OqHMKGwpvDgzzCixMTMMOL','...
1
vote
2answers
87 views
How can a Javascript file drop .exe written in Visual Basic without network communication?
I am analyzing a malicious JS file, which is obfuscated in a way that I could not de-obfuscate. When I executed it in a virtual machine and spectated process changes, I noticed that a new executable ...
4
votes
3answers
234 views
Obfuscated code analysis - can unused variables be ignored?
I am analyzing a malicious javascript. The code is encoded and obfuscated in a way that I did not manage to even partially deobfuscate yet and it is filled with long strings. In order to simplify the ...
1
vote
1answer
2k views
Is deobfuscation of my javascript code hard or easy?
I am trying to protect my app code from theft. Since most of it is written in javascript I had to use many obfuscation techniques to make it incomprehensible.
I have written a very small piece of ...
-3
votes
1answer
7k views
How do I decode this JavaScript code? [duplicate]
Each file starts with the same function:
(function(_0x128f83, _0x1ae5b9) {
var _0x1b5471 = function(_0x339be5) {
while (--_0x339be5) {
_0x128f83['push'](_0x128f83['shift']());
...
-1
votes
1answer
2k views
How decrypt hexadecimal javascript code? [closed]
Someone here already had success to deobfuscate 100% a "hexadecimal" Javascript code?
E.g.:
var _0x22bc92 = function() {
var _0x26938d = !![];
return function(_0x100751, _0x54d399) {
...
1
vote
0answers
46 views
Movies Anywhere ID?
I'm looking to automate requesting movies from different retailers on Movies Anywhere. The URL for the request is: https://retailer.moviesanywhere.com/api/purchase/initiate?retailer={retailer}&id={...
1
vote
1answer
438 views
Map an obfuscated javascript file to the original
Among other approaches, there are ways to "prettify" obfuscated javascript. But most of such approaches are geared towards someone trying to understand code that's not their own (e.g. from a website, ...
1
vote
0answers
92 views
What is the link between g-recaptcha-response one time token and deciphered audio text?
They are multiple reports of recaptcha v2 bypass. Most of the time, the explanation is neural networks services provided by Google or ɪʙᴍ.
But there is something I am failing to understand : for most ...
-2
votes
1answer
649 views
would be possible to deobfuscate javascript code? [closed]
the code is:
https://pastebin.com/wTkB81v4
would be possible to deobfuscate the code to get the original code?
1
vote
1answer
274 views
deobfuscating javascript injected into Wordpress
Found a WP site (not mine) with lovely obfuscated code injected into the footer so I've been trying to de-obfuscate it.
I ran it through unpacker, then converted hex to ASCII, then un-minified to ...
0
votes
2answers
556 views
IDA Pro Alternative for JavaScript?
I am looking for a good "disassembler" for JavaScript, like IDA Pro but for JS. I am looking at a chrome extension, but the JavaScript is heavily obfuscated. After deobfuscating, I am left with ...
2
votes
0answers
2k views
Tool for JavaScript deobfuscation
I'd like to reverse engineer a JavaScript program by manually renaming minimified variable, parameter and function names. However, updating my reverse-engineered code to a newer version would be very ...
3
votes
0answers
110 views
Adobe Reader JIT Pages
I use Adobe Reader XI for a little research project.
I know that Adobe use SpiderMonkey as its JS engine.
When opening a .pdf file that contains JS, the JS code is compiled in runtime in parts (JIT)...
1
vote
2answers
247 views
reverse javascript crackme encryption method algorithm
This crackme contains a text input element on the screen and a button to validate
The value you enter is set into _inputValue, afterwards you click on a button, the function executes, in the last ...
2
votes
2answers
146 views
How to call an item of a Javascript array?
Say I have the following Javascript array:
var _0xe984=[ '\x61\x70\x70\x6c\x79',
'\x72\x65\x74\x75\x72\x6e\x20\x28\x66\x75\x6e\x63\x74\x69\x6f\x6e\x20\x28\x29\x20',
'\x7b\x7d\x2e\x63\x6f\x6e\x73\...
2
votes
2answers
346 views
How work this obfuscation, and how deobfuscate?
Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§=~[];Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§={___:++Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§,$$$$:(![]+"")[Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§],__$:++Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§,$_$_:(![]+"")[Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§],_$_:++Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§,$_$$:({}+"")[Ø Ø¡Ø¢Ø£Ø¤Ø¥Ø¦Ø§...
1
vote
1answer
153 views
Likely malicous Javascript-interested in how it works
Got this interesting bit of code compressed in an email named "Install-MSOffice365-WebView-Plugin-Update-0.165.11a.exe.js" that is undoubtedly malicous, but was curious what it does and am not much of ...
4
votes
3answers
36k views
How to get Video URL from embedded Link in Twitter
I'm trying to get the Video URL of ( https://twitter.com/i/videos/823649890379120640?embed_source=facebook )
I tried going over the source code but it give the same URL link
<meta property="og:...
3
votes
1answer
926 views
Possible to get the full url behind javascript button?
I am programming a little tool for patching. I found the microsoft update catalog, where all updates are stored, and I managed to look for some of them.
But my problem is now that the actual download ...
7
votes
1answer
2k views
How do I reverse this javascript code? How is it packed?
I've a couple of questions regarding this javascript code, I found injected in one of my web pages.
What is this script doing?
Which tool is used to pack or obfuscate this script?
How can I learn the ...
2
votes
1answer
5k views
Frida manipulating arguments - Android
I've attempting to learn how to use Frida to instrument android app, just for person interest.
So far I've managed to get my environment set up with a physical android tablet and I can successfully ...
0
votes
1answer
109 views
Census world and US population clocks
I'm trying to figure out the formula used by the US Census Department's world and US population clocks here:
https://www.census.gov/popclock/?intcmp=home_pop
I'm pretty sure they're using a browser-...
1
vote
0answers
65 views
Reverse engineer StackExchange winter bash
I'm curious if it's possible to reverse engineer the hat positioning and control of the StackExchange winter bash.
They offer the "show controls" checkbox, but it's still all mouse-based; when you ...
-3
votes
1answer
5k views
How to deobfuscated javascript?
How to deobfuscate javascript file, i have a javascript code are deobfuscate .
Code: http://pastebin.com/zFH2GidN
Help me and thanks you.
0
votes
1answer
130 views
Reverse Engineer Joomla fabrik calculator
I am wondering if it is possible to reverse engineer the calculator on this url:
http://www.contrelec.co.uk/index.php/en/motor-full-load-current-estimator-kw
It appears to be a Joomla site with the ...
2
votes
0answers
169 views
Javascript equivalent of JEB
In case you already know, there is a full-feature decompiler for Java/Android called JEB (https://www.pnfsoftware.com/)
Some of the most important features include the ability to rename identifiers ...
0
votes
2answers
540 views
Reverse engineering a java applet using python/Javascript
I love doing online stock trading in my free time. Because I spend most of the day at my job I cannot do much of it. So, I'm thinking of making a software that will automatically place trades for me ...
1
vote
0answers
74 views
Where to identify and access the main object/closure in a JavaScript web app?
I want to add missing functionality to a web app's front end code JavaScript code.
I can find the code in the browser's developer tools by setting breakpoints and stepping through.
But in a large ...
