Skip to main content

Man-In-The-Browser Malware

Have heard about the malware quite long time back but today I got a chance to study about it into one of the magazines (net-security.org). It's interesting, really amazing, a clever way to steal money from transactions without you sense anything suspicious happening.
Without going into technical details, this Man-In-The-Browser (MITB) Malware is known as 'URLZone'. In contrast to Man in the middle (MITM) attack where the communication is intercepted and changed in between client and server over the wire this MITB malware infects the client machine installs some exe's like unisntall02.exe on the client machine. It then sends back the ID to the Command and Control server that is used by the hacker.
How it works:
This is most interesting part which made me read the article till end.

It records for the requests which are going on POST and over https, which indicates that something valuable is being transferred.
When user makes the transaction the URLzone malware silently changes the recipients name with the hacker's name. All these can be defined into the configuration file of the malware.
The bank will see the request as genuine as the sessionID and other tokens will be valid and transfer the amount from the user to hacker's account.
Then it intercepts again the response from the bank and replace the hacker's name to the original recipient's name which the user/sender was expecting to see.
This is the brief overview of its functioning. For more you can refer to following magazine (reference):
http://www.net-security.org/dl/insecure/INSECURE-Mag-29.pdf
It's really interesting.



Comments

Vaibhav said…
I was thinking of the same but as a MITM keylogger..
But about malware i have one doubt here... banks are not so foolish to transfer money to other account directly they have NEFT and RTGS in place.
Manipulating account no may not work as todays internet banking of most of the banks have implemented a system to add the Payee (whom you are transfering the money)then the payee has to be confirmed by OTP (One time Password which is send by SMS or email)than only the transfer happens succesfully...


Wants your view on this... :)

Popular posts from this blog

File Upload through Null Byte Injection

Sometimes, during file upload we come across situation wherein there would be check on the file extension at the client side as well as server side too. If the application does allow only .jpeg extension to be uploaded, the client side java script checks for the extension of the file before passing the request. We all know that how easily this can be defeated.
Some applications, checks for the extension at the server side also. That's not easy to bypass. However there are some ways with which it still can be bypassed. Most of server side scripts are written in high level languages such as Php, Java etc who still use some C/C++ libraries to read the file name and contents. That leads to the problem. In C/C++ a line ends with /00 or which is called Null Byte. So whenever the interpreter sees a null byte at the end of the a string, it stops reading thinking it has reached at the end of the string.
This can be used for the bypass. It works for many servers, specially php servers. Th…

SQL Injection in search field

Earlier I had written about performing SQL injection in search field and how to do a DoS attack and privilege escalation using 'Like' operators. Now another SQLi exploitation I came across recently. That too in the search field. This becomes important as lots of people don't pay much attention on the search forms/ fields in the application. My aim is to show that a search form can also be exploited with SQL Injection. The following queries are based on a real world exploitation. The steps and data are for just illustration purpose only. Suppose, the search form provides the details of users who have accessed the application some time and their login time details etc, we just need to provide their name in the search box provided. All the data were being going as Post request. So, to just fingerprint the database, I provide, 'nil'+'esh' in the search field and it successfully gives me the results. That means the database behind the application is concatenat…

Insecure protocols

Some basic insecure protocols and risk associated with them: