$ git clone https://github.com/keystone-engine Install keystone and compile it using: https://github.com/keystone-engine/keystone/blob/master/docs/COMPILE-NIX.md if it doesnt compile just apt-get install libssl-dev then recompile file: offject.py """injects Thumb instructions at a specific location in a binary""" Usage: rd@Wakanda $ hexdump -C foo.txt 00000000 41 53 20 49 46 20 54 48 49 53 20 49 53 20 41 20 |AS IF THIS IS A | 00000010 42 49 4e 41 52 59 20 3a 29 0a |BINARY :).| 0000001a rd@Wakanda $ ./offject.py -i foo.txt -o bar.txt offject> mov r1,r1 0946 offject> nop 094600bf offject> write Enter offset: [0xabc]> 0x10 Done! rd@Wakanda $ hexdump -C bar.txt 00000000 41 53 20 49 46 20 54 48 49 53 20 49 53 20 41 20 |AS IF THIS IS A | 00000010 09 46 00 bf 52 59 20 3a 29 0a |.F..RY :).| 0000001a rd@Wakanda $ ./offject.py -i foo.txt -o bar.txt offject> mov r1,r1;nop 094600bf offject> write Enter offset: [0xabc]> 0x0 Done! rd@Wakanda $ hexdump -C bar.txt 00000000 09 46 00 bf 46 20 54 48 49 53 20 49 53 20 41 20 |.F..F THIS IS A | 00000010 42 49 4e 41 52 59 20 3a 29 0a |BINARY :).| 0000001a