Linux 4.9 Loadable Kernel Module to hide processes from system utilities
root @ debtest ~/hideproc-lkm # ./putfile&
[1] 1942
root @ debtest ~/hideproc-lkm # ls -l /tmp/test-put
-rw-r--r-- 1 root root 4 Aug 24 22:24 /tmp/test-put
root @ debtest ~/hideproc-lkm # rm /tmp/test-put
root @ debtest ~/hideproc-lkm # ls -l /tmp/test-put
-rw-r--r-- 1 root root 4 Aug 24 22:24 /tmp/test-put
root @ debtest ~/hideproc-lkm # ps aux | grep putfile
root 1942 0.0 0.0 4172 640 pts/0 SN 22:24 0:00 ./putfile
root 1949 0.0 0.0 12784 964 pts/0 S+ 22:25 0:00 grep --color=auto putfile
root @ debtest ~/hideproc-lkm # dmesg -C
root @ debtest ~/hideproc-lkm # insmod hideproc.ko verb=1 target_pid=1942
root @ debtest ~/hideproc-lkm # rmmod hideproc
root @ debtest ~/hideproc-lkm # dmesg -c
[ 510.232550] Target PID is 1942
[ 510.232561] Process id is 1942
[ 510.232561] Next process is insmod
[ 510.232562] Prev process is kworker/1:0
[ 516.951242] Goodbye, World!
root @ debtest ~/hideproc-lkm # ps aux | grep putfile
root @ debtest ~/hideproc-lkm [1] # ls -l /tmp/test-put
-rw-r--r-- 1 root root 4 Aug 24 22:26 /tmp/test-put
root @ debtest ~/hideproc-lkm # rm /tmp/test-put
root @ debtest ~/hideproc-lkm # ls -l /tmp/test-put
-rw-r--r-- 1 root root 4 Aug 24 22:26 /tmp/test-put