If the program was linked statically to libfoo, you won't be able to preempt any libfoo symbols using LD_PRELOAD. There are other interception techniques that

If the program was linked statically to libfoo, you won't be able to preempt any libfoo symbols using LD_PRELOAD. There are other interception techniques that work against any binaries, even fully static ones: http://man7.org/linux/man-pages/man2/ptrace.2.html http://man7.org/linux/man-pages/man2/ptrace.2.html http://man7.org/linux/man-pages/man2/seccomp.2.html http://man7.org/linux/man-pages/man2/seccomp.2.html