Instructions to try:
gcc child.c -o child
ld -r -b binary -o childbin.o child
gcc -fPIC -shared injector.c childbin.o -o injector.so
LD_PRELOAD=./injector.so /bin/echo Hello from the target binary
Use LD_PRELOAD injection to spawn a child process Copyright (C) 2024 Joseph C. Sible
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.