hook stash: a1af9ba65d57be898e079a98229845f42069c1e6hook

13 files changed, 1013 insertions, 0 deletions

diff --git a/src/hook/CMakeLists.txt b/src/hook/CMakeLists.txt
new file mode 100644
index 0000000..79a7186
--- /dev/null
+++ b/src/hook/CMakeLists.txt
@@ -0,0 +1,22 @@
+
+# get all modules first
+
+list(APPEND
+    HOOK_SOURCES
+    ${CMAKE_CURRENT_SOURCE_DIR}/arch.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/arch.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/hook.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/hook.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/inject.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/inject.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/memory.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/memory.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/module.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/module.h
+)
+add_subdirectory(payloads)
+
+add_library(hook STATIC ${HOOK_SOURCES})
+target_compile_options(hook PUBLIC ${CFLAGS})
+target_include_directories(hook PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(hook PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
diff --git a/src/hook/arch.c b/src/hook/arch.c
new file mode 100644
index 0000000..19c37e9
--- /dev/null
+++ b/src/hook/arch.c
@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <limits.h>
+#include <sys/types.h>
+
+#include "arch.h"
+
+unsigned char getProcessBits(pid_t pid)
+{
+    char exe_path[PATH_MAX];
+    snprintf(exe_path, sizeof(exe_path), "/proc/%i/exe", pid);
+
+    return getElfBits(exe_path);
+}
+
+unsigned char getElfBits(const char* path)
+{
+    if (!path)
+        return 0;
+
+    FILE* fd = fopen(path, "rb");
+    if (!fd)
+        return 0;
+
+    char indent[5];
+    fread(indent, sizeof(*indent), sizeof(indent), fd);
+    fclose(fd);
+
+    if (indent[0] != 0x7f)
+        return 0;
+
+    if (indent[1] != 'E' ||
+        indent[2] != 'L' ||
+        indent[3] != 'F')
+        return 0;
+
+    if (indent[4] == 1)
+        return 32;
+    else if (indent[4] == 2)
+        return 64;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/src/hook/arch.h b/src/hook/arch.h
new file mode 100644
index 0000000..8e81ad8
--- /dev/null
+++ b/src/hook/arch.h
@@ -0,0 +1,9 @@
+#ifndef ARCH_H
+#define ARCH_H
+
+#include <sys/types.h>
+
+unsigned char getProcessBits(pid_t pid);
+unsigned char getElfBits(const char* path);
+
+#endif
\ No newline at end of file
diff --git a/src/hook/hook.c b/src/hook/hook.c
new file mode 100644
index 0000000..b677a79
--- /dev/null
+++ b/src/hook/hook.c
@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <sys/syscall.h>
+#include <sys/mman.h>
+#include <string.h>
+
+#include "hook.h"
+#include "inject.h"
+#include "memory.h"
+#include "module.h"
+
+#include "payloads/libSysLoadLibrary_so.h"
+
+// defined in tvn:proc.c
+extern pid_t getPid(const char*);
+
+static void writeToDisk(const char* path, const char* content, const size_t size)
+{
+    FILE* fd = fopen(path, "wb");
+    fwrite(content, sizeof(*content), size, fd);
+    fclose(fd);
+}
+
+int fix_SysLoadLibary()
+{
+    pid_t pid = getPid("loop_forever");
+    printf("%i\n", pid);
+    if (pid != -1)
+    {
+        char* path = "/tmp/SysLoadLibrary.so";
+
+        fprintf(stderr, "[~] writing library to disk\n");
+        writeToDisk(path, libSysLoadLibrary_so, libSysLoadLibrary_so_size);
+
+        //inject_syscall(pid, 1, (void*)21, NULL, NULL, NULL, NULL, NULL); 
+
+        fprintf(stderr, "[~] loading library into process\n");
+        int ret = load_library(pid, path);  
+        if (!ret)
+            fprintf(stderr, "[*] Success\n");
+        else if (ret == 1)
+            fprintf(stderr, "[!] library already loaded\n");
+        else
+            fprintf(stderr, "[!] could not load libary\n");
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/src/hook/hook.h b/src/hook/hook.h
new file mode 100644
index 0000000..f31cdfd
--- /dev/null
+++ b/src/hook/hook.h
@@ -0,0 +1,10 @@
+#ifndef HOOK_H
+#define HOOK_H
+
+#ifndef HAS_HOOKS
+#error hooks have not been enabled
+#endif
+
+int fix_SysLoadLibary();
+
+#endif
\ No newline at end of file
diff --git a/src/hook/inject.c b/src/hook/inject.c
new file mode 100644
index 0000000..34c078c
--- /dev/null
+++ b/src/hook/inject.c
@@ -0,0 +1,412 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/user.h>
+#include <sys/wait.h>
+#include <sys/ptrace.h>
+#include <sys/mman.h>
+#include <dlfcn.h>
+#include <unistd.h>
+#include <elf.h>
+
+#include "inject.h"
+#include "memory.h"
+#include "module.h"
+#include "arch.h"
+
+#define Elf64W(type) Elf64_ ## type
+#define Elf32W(type) Elf32_ ## type
+
+#define Elf64Ehdr Elf64W(Ehdr)
+#define Elf32Ehdr Elf32W(Ehdr)
+
+#define Elf64Shdr Elf64W(Shdr)
+#define Elf32Shdr Elf32W(Shdr)
+
+#define Elf64Sym Elf64W(Sym)
+#define Elf32Sym Elf32W(Sym)
+
+static uintptr_t getSymbolOffset(const char* elf_path, const char* symbol_name)
+{
+    unsigned char bits = getElfBits(elf_path);
+
+    FILE* fd = fopen(elf_path, "rb");
+    fseek(fd, 0, SEEK_END);
+    size_t elf_size = (size_t)  ftell(fd);
+    rewind(fd);
+
+    char* elf_body = malloc(elf_size);
+    fread(elf_body, 1, elf_size, fd);
+    fclose(fd);
+
+    if (bits == 64)
+    {
+        Elf64Ehdr* header = (Elf64Ehdr*)elf_body;
+
+        Elf64Shdr* section = (Elf64Shdr*)(elf_body + header->e_shoff);
+        Elf64Shdr* symtab_section = NULL;
+        for (uintptr_t i = 0; i <= header->e_shnum; i++)
+        {
+            if (i == header->e_shnum)
+                return 0;
+
+            if (section[i].sh_type == SHT_SYMTAB)
+            {
+                symtab_section = section+i;
+                break; 
+            }
+        }
+
+        Elf64Sym* symtab = (Elf64Sym*)(elf_body + symtab_section->sh_offset);
+        size_t symbol_num = symtab_section->sh_size / symtab_section->sh_entsize;
+        char *symbol_names = (char *)(elf_body + section[symtab_section->sh_link].sh_offset);
+
+        for (size_t j = 0; j < symbol_num; ++j)
+        {
+            char* name = symbol_names + symtab[j].st_name;
+            size_t symbol_name_len = strlen(symbol_name);
+            if (strncmp(name, symbol_name, symbol_name_len))
+                continue;
+            if (name[symbol_name_len] != '\0' && name[symbol_name_len] != '@')
+                continue;
+
+            if (symtab[j].st_value > 0)
+            {
+                uintptr_t value = symtab[j].st_value;
+                free(elf_body);
+                return value;
+            }
+        }
+    }
+    else if (bits == 32)
+    {
+        Elf32Ehdr* header = (Elf32Ehdr*)elf_body;
+
+        Elf32Shdr* section = (Elf32Shdr*)(elf_body + header->e_shoff);
+        Elf32Shdr* symtab_section = NULL;
+        for (uintptr_t i = 0; i <= header->e_shnum; i++)
+        {
+            if (i == header->e_shnum)
+                return 0;
+
+            if (section[i].sh_type == SHT_SYMTAB)
+            {
+                symtab_section = section+i;
+                break; 
+            }
+        }
+
+        Elf32Sym* symtab = (Elf32Sym*)(elf_body + symtab_section->sh_offset);
+        size_t symbol_num = symtab_section->sh_size / symtab_section->sh_entsize;
+        char *symbol_names = (char *)(elf_body + section[symtab_section->sh_link].sh_offset);
+
+        for (size_t j = 0; j < symbol_num; ++j)
+        {
+            char* name = symbol_names + symtab[j].st_name;
+            size_t symbol_name_len = strlen(symbol_name);
+            if (strncmp(name, symbol_name, symbol_name_len))
+                continue;
+            if (name[symbol_name_len] != '\0' && name[symbol_name_len] != '@')
+                continue;
+
+            if (symtab[j].st_value > 0)
+            {
+                uintptr_t value = symtab[j].st_value;
+                free(elf_body);
+                return value;
+            }
+        }
+    }
+
+    free(elf_body);
+
+    return 0;
+}
+
+void* inject_syscall(
+    pid_t pid,
+    uintptr_t syscall_n,
+    void* arg0,
+    void* arg1,
+    void* arg2,
+    void* arg3,
+    void* arg4,
+    void* arg5
+){
+    void* ret = (void*)-1;
+    int status;
+    struct user_regs_struct old_regs, regs;
+    void* injection_addr = (void*)-1;
+
+    //This buffer is our payload, which will run a syscall properly on x86/x64
+    unsigned char injection_buf[] =
+    {
+        0xff, 0xff, // placerholder
+        /* these nops are here because
+         * we're going to write memory using
+         * ptrace, and it always writes the size
+         * of a word, which means we have to make
+         * sure the buffer is long enough
+        */
+        0x90, //nop
+        0x90, //nop
+        0x90, //nop
+        0x90, //nop
+        0x90, //nop
+        0x90  //nop
+    };
+
+    unsigned char bits = getProcessBits(pid);
+    if (bits == 64)
+    {
+        //syscall
+        injection_buf[0] = 0x0f;
+        injection_buf[1] = 0x05;   
+    }
+    else if (bits == 32)
+    {
+        //int80 (syscall)
+        injection_buf[0] = 0xcd;
+        injection_buf[1] = 0x80;
+    }
+    else
+    {
+        return NULL;
+    }
+
+    //As ptrace will always write a uintptr_t, let's make sure we're using proper buffers
+    uintptr_t old_data;
+    uintptr_t injection_buffer;
+    memcpy(&injection_buffer, injection_buf, sizeof(injection_buffer));
+
+    //Attach to process using 'PTRACE_ATTACH'
+    ptrace(PTRACE_ATTACH, pid, NULL, NULL);
+    wait(&status);
+
+    /* Get the current registers using 'PTRACE_GETREGS' so that
+     * we can restore the execution later
+     * and also modify the bytes of EIP/RIP
+    */
+
+    ptrace(PTRACE_GETREGS, pid, NULL, &old_regs);
+    regs = old_regs;
+
+    //Now, let's set up the registers that will be injected into the tracee
+
+#if defined(__i386__)
+    regs.eax = (uintptr_t)syscall_n;
+    regs.ebx = (uintptr_t)arg0;
+    regs.ecx = (uintptr_t)arg1;
+    regs.edx = (uintptr_t)arg2;
+    regs.esi = (uintptr_t)arg3;
+    regs.edi = (uintptr_t)arg4;
+    regs.ebp = (uintptr_t)arg5;
+    injection_addr = (void*)regs.eip;
+#elif defined(__x86_64__)
+    if (bits == 64)
+    {
+        regs.rax = (uintptr_t)syscall_n;
+        regs.rdi = (uintptr_t)arg0;
+        regs.rsi = (uintptr_t)arg1;
+        regs.rdx = (uintptr_t)arg2;
+        regs.r10 = (uintptr_t)arg3;
+        regs.r8  = (uintptr_t)arg4;
+        regs.r9  = (uintptr_t)arg5;
+        injection_addr = (void*)regs.rip;
+    }
+    else if (bits == 32)
+    {
+        regs.rax = (uintptr_t)syscall_n;
+        regs.rbx = (uintptr_t)arg0;
+        regs.rcx = (uintptr_t)arg1;
+        regs.rdx = (uintptr_t)arg2;
+        regs.rsi = (uintptr_t)arg3;
+        regs.rdi = (uintptr_t)arg4;
+        regs.rbp = (uintptr_t)arg5;
+        injection_addr = (void*)regs.rip;
+    }
+#endif
+
+    //Let's store the buffer at EIP/RIP that we're going to modify into 'old_data' using 'PTRACE_PEEKDATA'
+    old_data = (uintptr_t)ptrace(PTRACE_PEEKDATA, pid, injection_addr, NULL);
+
+    //Let's write our payload into the EIP/RIP of the target process using 'PTRACE_POKEDATA'
+    ptrace(PTRACE_POKEDATA, pid, injection_addr, injection_buffer);
+
+    //Let's inject our modified registers into the target process using 'PTRACE_SETREGS'
+    ptrace(PTRACE_SETREGS, pid, NULL, &regs);
+
+    //Let's run a single step in the target process (execute one assembly instruction)
+    ptrace(PTRACE_SINGLESTEP, pid, NULL, NULL);
+    waitpid(pid, &status, WSTOPPED); //Wait for the instruction to run
+
+    //Let's get the registers after the syscall to store the return value
+    ptrace(PTRACE_GETREGS, pid, NULL, &regs);
+#if defined(__i386__)
+    ret = (void*)regs.eax;
+#elif defined(__x86_64__)
+    ret = (void*)regs.rax;
+#endif
+
+    long long ret_int = (long long)ret;
+
+    if (ret_int < 0)
+        fprintf(stderr, "syscall error: %s\n", strerror((int)-ret_int));
+
+    //Let's write the old data at EIP/RIP
+    ptrace(PTRACE_POKEDATA, pid, (void*)injection_addr, old_data);
+
+    //Let's restore the old registers to continue the normal execution
+    ptrace(PTRACE_SETREGS, pid, NULL, &old_regs);
+    ptrace(PTRACE_DETACH, pid, NULL, NULL); //Detach and continue the execution
+
+    return ret;
+}
+
+
+/**
+ * Return values:
+ *  1 already loaded
+ *  2 arch error
+ */
+int load_library(pid_t pid, char* lib_path)
+{
+    /* Let's get the address of the 'libc_dlopen_mode' of the target process
+     * and store it on 'dlopen_ex' by loading the LIBC of the target process
+     * on here and then getting the offset of its own '__libc_dlopen_mode'.
+     * Then we sum this offset to the base of the external LIBC module
+     */
+    struct module_s lib_mod = getModule(pid, lib_path);
+    if (lib_mod.size)
+        return 1;
+
+    struct module_s libc_ex = getModule(pid, "/libc.so");
+    uintptr_t offset = getSymbolOffset(libc_ex.path, "__libc_dlopen_mode");
+
+    // fallback
+    if (!offset)
+        offset = getSymbolOffset(libc_ex.path, "dlopen");
+
+    fprintf(stderr, "%li\n", offset);
+
+    //Get the external '__libc_dlopen_mode' by summing the offset to the libc_ex.base
+    void* dlopen_ex = (void*)((uintptr_t)libc_ex.base + offset);
+
+    freeModule(&libc_ex);
+
+    //--- Now let's go to the injection part
+
+    int status;
+    struct user_regs_struct old_regs, regs;
+    unsigned char inj_buf_x64[] =
+    {
+        /* On 'x64', we dont have to pass anything to the stack, as we're only
+         * using 2 parameters, which will be stored on RDI (library path address) and
+         * RSI (flags, in this case RTLD_LAZY).
+         * This means we just have to call the __libc_dlopen_mode function, which
+         * will be on RAX.
+         */
+
+        0xFF, 0xD0, //call rax
+        0xCC,       //int3 (SIGTRAP)
+    };
+
+    unsigned char inj_buf_x86[] =
+    {
+        /* We have to pass the parameters to the stack (in reversed order)
+         * The register 'ebx' will store the library path address and the
+         * register 'ecx' will store the flag (RTLD_LAZY)
+         * After pushing the parameters to the stack, we will call EAX, which
+         * will store the address of '__libc_dlopen_mode'
+         */
+        0x51,       //push ecx
+        0x53,       //push ebx
+        0xFF, 0xD0, //call eax
+        0xCC,       //int3 (SIGTRAP)
+    };
+
+    unsigned char* inj_buf = NULL;
+    size_t sizeof_inj_buf = 0;
+
+    unsigned char bits = getProcessBits(pid);
+    if (bits == 64)
+    {
+        inj_buf = inj_buf_x64;
+        sizeof_inj_buf = sizeof(inj_buf_x64);
+    }
+    else if (bits == 32)
+    {
+        inj_buf = inj_buf_x86;
+        sizeof_inj_buf = sizeof(inj_buf_x86);
+    }
+    else
+    {
+        fprintf(stderr, "Could not figure out what injection buffer to use\n");
+        return 2;
+    }
+
+    //Let's allocate memory for the payload and the library path
+    size_t lib_path_len = strlen(lib_path) + 1;
+    size_t inj_size = sizeof_inj_buf + lib_path_len;
+    void* inj_addr = allocate_memory(pid, inj_size, PROT_EXEC | PROT_READ | PROT_WRITE);
+    void* path_addr = (void*)((uintptr_t)inj_addr + sizeof_inj_buf);
+
+    //Write the memory to our allocated address
+    write_memory(pid, inj_addr, inj_buf, sizeof_inj_buf);
+    write_memory(pid, path_addr, (void*)lib_path, lib_path_len);
+
+    //Attach to the target process
+    ptrace(PTRACE_ATTACH, pid, NULL, NULL);
+    wait(&status);
+
+    //Get the current registers to restore later
+    ptrace(PTRACE_GETREGS, pid, NULL, &old_regs);
+    regs = old_regs;
+
+    //Let's setup the registers according to our payload
+#   if defined(__i386__)
+    regs.eax = (long)dlopen_ex;
+    regs.ebx = (long)path_addr;
+    regs.ecx = (long)RTLD_LAZY;
+    regs.eip = (long)inj_addr; //The execution will continue from 'inj_addr' (EIP)
+#   elif defined(__x86_64__)
+    if (bits == 64)
+    {
+        regs.rax = (uintptr_t)dlopen_ex;
+        regs.rdi = (uintptr_t)path_addr;
+        regs.rsi = (uintptr_t)RTLD_LAZY;
+        regs.rip = (uintptr_t)inj_addr; //The execution will continue from 'inj_addr' (RIP)
+    }
+    else if (bits == 32)
+    {
+        regs.rax = (uintptr_t)dlopen_ex;
+        regs.rbx = (uintptr_t)path_addr;
+        regs.rcx = (uintptr_t)RTLD_LAZY;
+        regs.rip = (uintptr_t)inj_addr; //The execution will continue from 'inj_addr' (RIP)
+    }
+#   endif
+
+    //Inject the modified registers to the target process
+    ptrace(PTRACE_SETREGS, pid, NULL, &regs);
+
+    //Continue the execution
+    ptrace(PTRACE_CONT, pid, NULL, NULL);
+
+    //Wait for the int3 (SIGTRAP) breakpoint
+    waitpid(pid, &status, WSTOPPED);
+
+    //Set back the old registers
+    ptrace(PTRACE_SETREGS, pid, NULL, &old_regs);
+
+    //Detach from the process and continue the execution
+    ptrace(PTRACE_DETACH, pid, NULL, NULL);
+
+    //Deallocate the memory we allocated for the injection buffer and the library path
+    deallocate_memory(pid, inj_addr, inj_size);
+
+    return 0;
+}
+
+
+
diff --git a/src/hook/inject.h b/src/hook/inject.h
new file mode 100644
index 0000000..e82c445
--- /dev/null
+++ b/src/hook/inject.h
@@ -0,0 +1,10 @@
+#ifndef INJECT_H
+#define INJECT_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+void* inject_syscall(pid_t pid, uintptr_t syscall_n, void*, void*, void*, void*, void*, void*);
+int load_library(pid_t pid, char* lib_path);
+
+#endif
\ No newline at end of file
diff --git a/src/hook/memory.c b/src/hook/memory.c
new file mode 100644
index 0000000..eedf728
--- /dev/null
+++ b/src/hook/memory.c
@@ -0,0 +1,115 @@
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/uio.h>
+#include <sys/syscall.h>
+#include <sys/mman.h>
+#include <errno.h>
+
+#include "memory.h"
+#include "inject.h"
+#include "arch.h"
+
+#define mmap_x64 9
+#define munmap_x64 11
+#define mmap2_x86 192
+#define munmap_x86 91
+
+void read_memory(pid_t pid, void* src, void* dst, size_t size)
+{
+    /*
+    pid  = target process id
+    src  = address to read from on the target process
+    dst  = address to write to on the caller process
+    size = size of the buffer that will be read
+    */
+
+    struct iovec iosrc;
+    struct iovec iodst;
+    iodst.iov_base = dst;
+    iodst.iov_len  = size;
+    iosrc.iov_base = src;
+    iosrc.iov_len  = size;
+
+    if (process_vm_readv(pid, &iodst, 1, &iosrc, 1, 0) == -1)
+        fprintf(stderr, "process_vm_readv: %s\n", strerror(errno));
+}
+
+void write_memory(pid_t pid, void* dst, void* src, size_t size)
+{
+    /*
+    pid  = target process id
+    dst  = address to write to on the target process
+    src  = address to read from on the caller process
+    size = size of the buffer that will be read
+    */
+
+    struct iovec iosrc;
+    struct iovec iodst;
+    iosrc.iov_base = src;
+    iosrc.iov_len  = size;
+    iodst.iov_base = dst;
+    iodst.iov_len  = size;
+
+    if(process_vm_writev(pid, &iosrc, 1, &iodst, 1, 0) == -1)
+        fprintf(stderr, "process_vm_writev: %s\n", strerror(errno));
+}
+
+void* allocate_memory(pid_t pid, size_t size, int protection)
+{
+    //mmap template:
+    //void *mmap (void *__addr, size_t __len, int __prot, int __flags, int __fd, __off_t __offset);
+
+    void* ret = (void*)-1;
+
+    unsigned char bits = getProcessBits(pid);
+
+    if (bits == 32)
+    {
+        ret = inject_syscall(
+            pid,
+            mmap2_x86,
+            //arguments
+            (void*)0,
+            (void*)size,
+            (void*)(uintptr_t)protection,
+            (void*)(MAP_ANON | MAP_PRIVATE),
+            (void*)-1,
+            (void*)0
+        );
+    }
+    else if (bits == 64)
+    {
+        ret = inject_syscall(
+            pid,
+            mmap_x64,
+            //arguments
+            (void*)0,
+            (void*)size,
+            (void*)(uintptr_t)protection,
+            (void*)(MAP_ANON | MAP_PRIVATE),
+            (void*)-1,
+            (void*)0
+        );
+    }
+
+    return ret;
+}
+
+void deallocate_memory(pid_t pid, void* src, size_t size)
+{
+    unsigned char bits = getProcessBits(pid);
+    if (bits == 64)
+        inject_syscall(pid, munmap_x64, src, (void*)size, NULL, NULL, NULL, NULL);
+    else if (bits == 32)
+        inject_syscall(pid, munmap_x86, src, (void*)size, NULL, NULL, NULL, NULL);
+}
+
+void* protect_memory(pid_t pid, void* src, size_t size, int protection)
+{
+    //mprotect template
+    //int mprotect (void *__addr, size_t __len, int __prot);
+    return inject_syscall(pid, __NR_mprotect, src, (void*)size, (void*)(uintptr_t)protection, NULL, NULL, NULL);
+}
diff --git a/src/hook/memory.h b/src/hook/memory.h
new file mode 100644
index 0000000..cf1f74c
--- /dev/null
+++ b/src/hook/memory.h
@@ -0,0 +1,13 @@
+#ifndef MEMORY_H
+#define MEMORY_H 
+
+#include <sys/types.h>
+
+void read_memory(pid_t pid, void* src, void* dst, size_t size);
+void write_memory(pid_t pid, void* dst, void* src, size_t size);
+
+void* allocate_memory(pid_t pid, size_t size, int protection);
+void deallocate_memory(pid_t pid, void* src, size_t size);
+void* protect_memory(pid_t pid, void* src, size_t size, int protection);
+
+#endif
\ No newline at end of file
diff --git a/src/hook/module.c b/src/hook/module.c
new file mode 100644
index 0000000..41be1ee
--- /dev/null
+++ b/src/hook/module.c
@@ -0,0 +1,179 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include "module.h"
+#include "arch.h"
+
+#define fprintf(...)
+
+#define NOTFOUND (size_t)(-1)
+#define PROCMAPS_LINE_MAX_LENGTH (PATH_MAX + 100) 
+
+static void* strtoptr(pid_t pid, const char* nptr, char** endptr, int base)
+{
+    unsigned char bits = getProcessBits(pid);
+    if (bits == 64)
+        return (void*)strtoull(nptr, endptr, base);
+    else if (bits == 32)
+        return (void*)strtoul(nptr, endptr, base);
+
+    return NULL;
+
+}
+static size_t find(const char* a, const char* b, uintptr_t offset)
+{
+    const char* pos = a + offset;
+
+    while (*pos && strncmp(pos, b, strlen(b)))
+        ++pos;
+
+    if (!*pos)
+        return NOTFOUND;
+
+    return (size_t)(pos - a);
+}
+
+static size_t rfind(const char* a, const char* b, size_t offset)
+{
+    const char* pos = a + (strlen(a) - strlen(b) - offset);
+
+    while (a <= pos && strncmp(pos, b, strlen(b)))
+        --pos;
+
+    if (pos < a)
+        return NOTFOUND;
+
+    return (size_t)(pos - a);
+}
+
+static char* substr(const char* str, size_t pos, size_t len)
+{
+    str = str + pos;
+
+    if (len == NOTFOUND)
+        len = strlen(str);
+
+    char* buf = malloc(len+1);
+    strncpy(buf, str, len);
+    buf[len] = '\0';
+
+    return buf;
+}
+
+struct module_s getModule(pid_t pid, const char* module_name)
+{
+    struct module_s mod = {0};
+
+    char maps_file_path[PATH_MAX];
+    snprintf(maps_file_path, sizeof(maps_file_path), "/proc/%i/maps", pid);
+    fprintf(stderr, "Maps file path: %s\n", maps_file_path);
+
+
+    FILE* maps_file_fs = fopen(maps_file_path, "rb");
+    if (!maps_file_fs) return mod;
+
+    char maps_file[PROCMAPS_LINE_MAX_LENGTH];
+    while( !feof(maps_file_fs) ){
+        if (fgets(maps_file, sizeof(maps_file), maps_file_fs) == NULL){
+            fprintf(stderr,"fgets failed, %s\n",strerror(errno));
+            return mod;
+        }
+        size_t module_path_pos = 0;
+        size_t module_path_end = 0;
+
+        //Get the first slash in the line of the module name
+        module_path_pos = find(maps_file, module_name, 0);
+        if (module_path_pos == NOTFOUND)
+            continue;
+
+        module_path_pos = find(maps_file, "/", 0);
+
+        //Get the end of the line of the module name
+        module_path_end = find(maps_file, "\n", module_path_pos);
+
+        if(module_path_pos == NOTFOUND || module_path_end == NOTFOUND) continue;
+
+        //Module path substring
+        char* module_path_str = substr(maps_file, module_path_pos, module_path_end - module_path_pos);
+
+        fprintf(stderr, "Module path string: %s\n", module_path_str);
+
+        //--- Module name
+
+        char* module_name_str = substr(module_path_str,
+            rfind(module_path_str, "/", 0) + 1, //Substring from the last '/' to the end of the string
+            NOTFOUND
+        );
+
+        fprintf(stderr, "Module name: %s\n", module_name_str);
+
+        //--- Base Address
+
+        size_t base_address_pos = rfind(maps_file, "\n", module_path_pos) + 1;
+        size_t base_address_end = find(maps_file, "-", base_address_pos);
+        if(base_address_pos == NOTFOUND || base_address_end == NOTFOUND) continue;
+        char* base_address_str = substr(maps_file, base_address_pos, base_address_end - base_address_pos);
+        void* base_address = (void*)strtoptr(pid, base_address_str, NULL, 16);;
+        if (!base_address) return mod;
+
+        fprintf(stderr, "Base Address: %p\n", base_address);
+
+        //--- End Address
+        size_t end_address_pos;
+        size_t end_address_end;
+        char* end_address_str;
+        void* end_address;
+
+        //Get end address pos
+        end_address_pos = rfind(maps_file, module_path_str, 0);
+        end_address_pos = rfind(maps_file, "\n", end_address_pos) + 1;
+        end_address_pos = find(maps_file, "-", end_address_pos) + 1;
+
+        //Find first space from end_address_pos
+        end_address_end = find(maps_file, " ", end_address_pos);
+
+        if(end_address_pos == NOTFOUND || end_address_end == NOTFOUND) continue;
+
+        //End address substring
+        end_address_str = substr(maps_file, end_address_pos, end_address_end - end_address_pos);
+        end_address = (void*)strtoptr(pid, end_address_str, NULL, 16);
+        free(end_address_str);
+
+        fprintf(stderr, "End Address: %p\n", end_address);
+
+        //--- Module size
+
+        uintptr_t module_size = (uintptr_t)end_address - (uintptr_t)base_address;
+        fprintf(stderr, "End Address: %li\n", module_size);
+
+        mod.name = module_name_str;
+        mod.path = module_path_str;
+        mod.base = base_address;
+        mod.size = module_size;
+        mod.end  = end_address;
+
+        break;
+    }
+
+    //--- Module Path
+
+
+    //---
+
+    //Now we put all the information we got into the mod structure
+
+
+    fclose(maps_file_fs);
+
+    return mod;
+}
+
+void freeModule(struct module_s* mod)
+{
+	free(mod->name);
+	free(mod->path);
+}
diff --git a/src/hook/module.h b/src/hook/module.h
new file mode 100644
index 0000000..7fb83e1
--- /dev/null
+++ b/src/hook/module.h
@@ -0,0 +1,20 @@
+#ifndef MODULE_H
+#define MODULE_H
+
+#include <sys/types.h>
+#include <stdint.h>
+
+struct module_s
+{
+    char* name;
+    char* path;
+    void* base;
+    void* end;
+    uintptr_t size;
+    void* handle; //this will not be used for now, only internally with dlopen
+};
+
+struct module_s getModule(pid_t pid, const char* module_name);
+void freeModule(struct module_s* mod);
+
+#endif
\ No newline at end of file
diff --git a/src/hook/payloads/CMakeLists.txt b/src/hook/payloads/CMakeLists.txt
new file mode 100644
index 0000000..fe3968e
--- /dev/null
+++ b/src/hook/payloads/CMakeLists.txt
@@ -0,0 +1,36 @@
+
+list(APPEND
+    modules
+    SysLoadLibrary
+)
+
+foreach(module ${modules})
+    set(module_name "${module}")
+    add_library(${module} SHARED "${module}.c")
+    # OF is 32 bit, so we need to be too
+    set_target_properties(${module} PROPERTIES COMPILE_OPTIONS "-m32" LINK_FLAGS "-m32")
+
+
+    list(APPEND
+        module_embed_output
+        ${CMAKE_CURRENT_BINARY_DIR}/lib${module_name}_so.c
+        ${CMAKE_CURRENT_BINARY_DIR}/lib${module_name}_so.h
+    )
+    # embed
+    add_custom_command(
+        OUTPUT ${module_embed_output}
+        COMMAND ${CMAKE_COMMAND}
+        "-Dbin_in=$<TARGET_FILE:${module}>"
+        -P ${CMAKE_SOURCE_DIR}/cmake/FileEmbed.cmake
+        DEPENDS ${module}
+    )
+    add_library(${module_name}_embed OBJECT ${module_embed_output})
+    list(APPEND
+        HOOK_SOURCES
+        $<TARGET_OBJECTS:${module_name}_embed>
+    )
+
+    set(module_embed_output "")
+endforeach()
+
+set(HOOK_SOURCES ${HOOK_SOURCES} PARENT_SCOPE)
diff --git a/src/hook/payloads/SysLoadLibrary.c b/src/hook/payloads/SysLoadLibrary.c
new file mode 100644
index 0000000..314426d
--- /dev/null
+++ b/src/hook/payloads/SysLoadLibrary.c
@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <assert.h>
+#include <dlfcn.h>
+
+#define _DEBUG 1
+#define Q_IsAbsolutePath V_IsAbsolutePath
+#define Assert(f) assert(f)
+#define CommandLine CommandLine_Tier0
+#define Msg printf
+#define V_strcpy_safe strcpy
+#define Q_snprintf snprintf
+#define _getcwd getcwd
+
+typedef void* HMODULE;
+typedef int Sys_Flags;
+typedef void* CSysModule;
+
+static bool (*V_IsAbsolutePath)(const char *pPath) = NULL;
+static HMODULE (*Sys_LoadLibrary)(const char *pLibraryName, Sys_Flags flags) = NULL;
+static char* (*CommandLine__ParmValue)(const char* param) = NULL;
+
+CSysModule *Sys_LoadModule_replacement( const char *pModuleName, Sys_Flags flags /* = SYS_NOFLAGS (0) */ )
+{
+    // If using the Steam filesystem, either the DLL must be a minimum footprint
+    // file in the depot (MFP) or a filesystem GetLocalCopy() call must be made
+    // prior to the call to this routine.
+    char szCwd[1024];
+    HMODULE hDLL = NULL;
+
+    if ( !Q_IsAbsolutePath( pModuleName ) )
+    {
+        char szAbsoluteModuleName[1024];
+
+        // check if the sourcemod provides the library
+        const char *pGameDir = CommandLine__ParmValue("-game");
+        if ( pGameDir )
+        {
+            V_strcpy_safe( szCwd, pGameDir );
+            if (szCwd[strlen(szCwd) - 1] == '/' || szCwd[strlen(szCwd) - 1] == '\\' )
+            {
+                szCwd[strlen(szCwd) - 1] = 0;
+            }
+
+            Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/%s", szCwd, pModuleName );
+
+            hDLL = Sys_LoadLibrary( szAbsoluteModuleName, flags );
+        }
+
+        // if the lib was not in the mod check the base game
+        if (!hDLL)
+        {
+            // full path wasn't passed in, using the current working dir
+            Assert( _getcwd( szCwd, sizeof( szCwd ) ) );
+
+            if (szCwd[strlen(szCwd) - 1] == '/' || szCwd[strlen(szCwd) - 1] == '\\' )
+            {
+                szCwd[strlen(szCwd) - 1] = 0;
+            }
+
+            size_t cCwd = strlen( szCwd );
+            if ( strstr( pModuleName, "bin/") == pModuleName || ( szCwd[ cCwd - 1 ] == 'n'  && szCwd[ cCwd - 2 ] == 'i' && szCwd[ cCwd - 3 ] == 'b' )  )
+            {
+                // don't make bin/bin path
+                Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/%s", szCwd, pModuleName );          
+            }
+            else
+            {
+                Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/%s", szCwd, pModuleName );
+            }
+            hDLL = Sys_LoadLibrary( szAbsoluteModuleName, flags );
+        }
+    }
+
+    if ( !hDLL )
+    {
+        // full path failed, let LoadLibrary() try to search the PATH now
+        hDLL = Sys_LoadLibrary( pModuleName, flags );
+#if defined( _DEBUG )
+        if ( !hDLL )
+        {
+            // So you can see what the error is in the debugger...
+            Msg( "Failed to load %s: %s\n", pModuleName, dlerror() );
+        }
+#endif // DEBUG
+    }
+
+    return hDLL;
+}
+
+
+void __attribute__((constructor)) lib_entry()
+{
+    //It prints "Injected!" once the library gets loaded.
+    fprintf(stderr, "Injected!\n");
+}