- Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
- **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
- If using jsnice.org, click on the options button next to the "Nicify JavaScript" button, and de-select "Infer types" to reduce cluttering the code with comments.
- Ensure you do not leave any empty lines before the script, as it may affect the deobfuscation process and give inaccurate results.
3. Use console.log(<packerReturnVariable>);
- Find the return value at the end and change it to `console.log(<packerReturnVariable>);` so the deobfuscated js is printed instead of being executing.
- Then, paste the modified (and still obfuscated) js into https://jsconsole.com/ to see the deobfuscated js logged to the console.
- Finally, paste the deobfuscated output into https://prettier.io/playground/ to beautify it for analysis.
- __Note__: If you are still seeing packed (but different) js, it may be recursively packed. Repeat the process.
- If API key found, check here for potential usage syntax: https://github.com/streaak/keyhacks.
- Vuln functions
- InnerHTML() - If you found this, it means there is a potential chance for XSS if no proper sanitisation takes place. Even if your payload is sanitised, don’t worry. Trace the code to find out where the sanitisation takes place. Study it and try to get around the sanitisation.
- Postmessage() - If you have read my previous post (https://medium.com/techiepedia/what-are-sop-cors-and-ways-to-exploit-it-62a5e02100dc), you would notice that Postmessage() might lead to potential CORS issue. If the second parameter of the function set to *, you are the lucky one. Checkout my previous post to understand more about the mechanism behind.
- String.prototype.search() - This function looks normal. Why would it be a dangerous function? Well, it is because some developers used this to find occurrence of a string inside another string. However, “.” is treated as wildcard in this function. So, if this function is used as sanitisation check, you can simply bypass it by inputting “.”. Checkout Filedescryptor’s hackerone report: https://hackerone.com/reports/129873
- Endpoints & params
- Use [LinkFinder](https://github.com/GerbenJavado/LinkFinder) & [JS Miner](https://github.com/PortSwigger/js-miner).
- Vuln libs & deps
- Use [Retire.js](https://retirejs.github.io/retire.js/) and [NPM](https://snyk.io/advisor/) (scroll down to security section > all versions link).
- Cloud URLs
- Use [JS Miner](https://github.com/PortSwigger/js-miner).
- Subdomains
- Use [JS Miner](https://github.com/PortSwigger/js-miner).
[Psalm](https://phpmagazine.net/2018/12/find-errors-in-your-php-applications-with-psalm.html) and [PHPStan](https://phpmagazine.net/2020/09/phpstan-pro-edition-launched.html).
- Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
- **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
