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fuckptrace.c

fuckptrace.c
Posted Apr 2, 2003
Authored by truff | Site projet7.org

fuckptrace is a Linux kernel module used for bypassing anti-ptrace protection used against the reverse engineering process.

tags | kernel
systems | linux
SHA-256 | 4ae4703493e86a63a0d13935e9e14568b86026565924f9ba7e6b114fcc7646ee

fuckptrace.c

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/********************************************************\
* fuckptrace.c *
* By truff (truff@projet7.org) *
* *
* lkm to bypass anti ptrace protections in reverse *
* engineering process. *
* *
* Greetz to #root and #!fr people *
* *
* www.projet7.org - Security Researchs - *
\********************************************************/


#define MODULE=20
#define __KERNEL__=20

#include <linux/module.h>=20
#include <linux/kernel.h>=20
#include <sys/syscall.h>
#include <sys/ptrace.h>
#include <linux/sched.h>

extern void* sys_call_table[];=20
extern struct task_struct *current;

int (*orig_ptrace)(int requete, int pid, int addr, int data);


int hacked_ptrace(int requete, int pid, int addr, int data)
{=20
int ret =3D 0;

if (current->ptrace & PT_PTRACED)
ret =3D 0;
else=20
ret =3D orig_ptrace (requete, pid, addr, data);=20

return ret;
}=20

int init_module(void) =20
{=20
orig_ptrace =3D sys_call_table[SYS_ptrace];=20
sys_call_table[SYS_ptrace] =3D hacked_ptrace;=20
=20
return 0;=20
}=20

void cleanup_module(void) =20
{=20
sys_call_table[SYS_ptrace]=3Dorig_ptrace;=20
}


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