README.md

Simple Linux memory hack example

This project shows a basic example on how to hack the memory of a Linux process.

Building the project

mkdir build
cd build
cmake ..
make

Running the code

In first place, run the executable example to hack:

./stringloop

The process shows the heap address of the string which will be hacked.

Then run with root permissions the hack executable:

sudo ./hack

sudo is mandatory to have read/write access to /proc/<pid>/mem file.

The executable will find the pid alone by looking through the /proc directory, then finding the address of the string to hack.

Example

Terminal 1:

$ ./stringloop
Process ID : 3728
0 - Change me please (0x5614d5324670)
1 - Change me please (0x5614d5324670)
2 - Change me please (0x5614d5324670)
3 - It is true magic (0x5614d5324670)

Terminal 2:

$ sudo ./hack
Process 3728 found: ./stringloop
HEAP begin: 0x5614d5324000 - end: 0x5614d5345000
Scanning memory...
String address found: 0x5614d5324670
Writing operation successful :)