Posts Tagged ‘backdoor’

Infecting loadable kernel modules: kernel versions 2.6.x/3.0.x

April 18, 2012 29 comments

“Infecting loadable kernel modules: kernel versions 2.6.x/3.0.x” is the title of my last paper that has been published on phrack #68. You can read the paper here.

Many thanks to:
– blackb1rd (a phrack reviewer) who helped me in writing the paper.
– All the phrack staff for publishing the paper.
– emdel for … mmmh … Hi, emdel!

Any comments or suggestions would be (obviously) appreciated.

Syscall Hijacking: Dynamically obtain syscall table address (kernel 2.6.x)

January 20, 2011 32 comments

Hi. In this post I’ll show you how to obtain dynamically the syscall table address. In the last posts (this and this) I wrote codes in which the syscall table address was hardcoded (as suggested by sj).
Now I’ll show you how to dinamically obtain it. Read more…

Port-knocking Backdoor

October 21, 2010 5 comments

In this post I’ll explain to you how to make a *unix backdoor using a “port knocking” scheme. That is, if we’ll “knock” to some TCP ports that we have initially decided, our program will open a backdoor for us (but only for us :) ).
How does the “port knocking” scheme work? The attacker decides a particular sequence of packets that will be sent to a compromised server where the backdoor is running. When the backdoor program will receive this particular sequence then it will give to the attacker the server’s shell.
Read more…