练习使用Unicorn、Capstone
Unicorn是一个轻量级的多平台，多体系结构的CPU仿真器框架。官网：http://www.unicorn-engine.org/
Capstone是一个轻量级的多平台，多体系结构的反汇编框架。官网：http://www.capstone-engine.org/
参考：https://bbs.pediy.com/thread-224330.htm
练习：分析混淆的shllcode
shellcode=b"\xe8\xff\xff\xff\xff\xc0\x5d\x6a\x05\x5b\x29\xdd\x83\xc5\x4e\x89\xe9\x6a\x02\x03\x0c\x24\x5b\x31\xd2\x66\xba\x12\x00\x8b\x39\xc1\xe7\x10\xc1\xef\x10\x81\xe9\xfe\xff\xff\xff\x8b\x45\x00\xc1\xe0\x10\xc1\xe8\x10\x89\xc3\x09\xfb\x21\xf8\xf7\xd0\x21\xd8\x66\x89\x45\x00\x83\xc5\x02\x4a\x85\xd2\x0f\x85\xcf\xff\xff\xff\xec\x37\x75\x5d\x7a\x05\x28\xed\x24\xed\x24\xed\x0b\x88\x7f\xeb\x50\x98\x38\xf9\x5c\x96\x2b\x96\x70\xfe\xc6\xff\xc6\xff\x9f\x32\x1f\x58\x1e\x00\xd3\x80"
使用capstone反汇编：
from capstone import*
md=Cs(CS_ARCH_X86,CS_MODE_32)//初始化，指定处理器架构
shellcode = b"\xe8\xff\xff\xff\xff\xc0\x5d\x6a\x05\x5b\x29\xdd\x83\xc5\x4e\x89\xe9\x6a\x02\x03\x0c\x24\x5b\x31\xd2\x66\xba\x12\x00\x8b\x39\xc1\xe7\x10\xc1\xef\x10\x81\xe9\xfe\xff\xff\xff\x8b\x45\x00\xc1\xe0\x10\xc1\xe8\x10\x89\xc3\x09\xfb\x21\xf8\xf7\xd0\x21\xd8\x66\x89\x45\x00\x83\xc5\x02\x4a\x85\xd2\x0f\x85\xcf\xff\xff\xff\xec\x37\x75\x5d\x7a\x05\x28\xed\x24\xed\x24\xed\x0b\x88\x7f\xeb\x50\x98\x38\xf9\x5c\x96\x2b\x96\x70\xfe\xc6\xff\xc6\xff\x9f\x32\x1f\x58\x1e\x00\xd3\x80"
for code in md.disasm(shellcode,0x0):
print("0x%x:\t%s\t%s"%(code.address,code.mnemonic,code.op_str))
反汇编结果：
0x0: call 4
0x5: rcr byte ptr [ebp + 0x6a], 5
0x9: pop ebx
0xa: sub ebp, ebx
0xc: add ebp, 0x4e
0xf: mov ecx, ebp
0x11: push 2
0x13: add ecx, dword ptr [esp]
0x16: pop ebx
0x17: xor edx, edx
0x19: mov dx, 0x12
0x1d: mov edi, dword ptr [ecx]
0x1f: shl edi, 0x10
0x22: shr edi, 0x10
0x25: sub ecx, 0xfffffffe
0x2b: mov eax, dword ptr [ebp]
0x2e: shl eax, 0x10
0x31: shr eax, 0x10
0x34: mov ebx, eax
0x36: or ebx, edi
0x38: and eax, edi
0x3a: not eax
0x3c: and eax, ebx
0x3e: mov word ptr [ebp], ax
0x42: add ebp, 2
0x45: dec edx
0x46: test edx, edx
0x48: jne 0x1d
0x4e: in al, dx
0x4f: aaa
0x50: jne 0xaf
0x52: jp 0x59
0x54: sub ch, ch
0x56: and al, 0xed
0x58: and al, 0xed
0x5a: or ecx, dword ptr [eax - 0x67af1481]
0x60: cmp cl, bh
0x62: pop esp
0x63: xchg eax, esi
0x64: sub edx, dword ptr [esi - 0x390190]
下面使用unicorn模拟执行
from unicorn import *
from unicorn.x86_const import *
from capstone import*
md=Cs(CS_ARCH_X86,CS_MODE_32)#初始化反汇编
BASE = 0x400000
STACK_ADDR = 0x0
STACK_SIZE = 1024 * 1024 mu = Uc(UC_ARCH_X86, UC_MODE_32)#初始化 mu.mem_map(BASE, 1024 * 1024)#开辟模拟运行的映射空间
mu.mem_map(STACK_ADDR, STACK_SIZE)#栈空间
shellcode = b"\xe8\xff\xff\xff\xff\xc0\x5d\x6a\x05\x5b\x29\xdd\x83\xc5\x4e\x89\xe9\x6a\x02\x03\x0c\x24\x5b\x31\xd2\x66\xba\x12\x00\x8b\x39\xc1\xe7\x10\xc1\xef\x10\x81\xe9\xfe\xff\xff\xff\x8b\x45\x00\xc1\xe0\x10\xc1\xe8\x10\x89\xc3\x09\xfb\x21\xf8\xf7\xd0\x21\xd8\x66\x89\x45\x00\x83\xc5\x02\x4a\x85\xd2\x0f\x85\xcf\xff\xff\xff\xec\x37\x75\x5d\x7a\x05\x28\xed\x24\xed\x24\xed\x0b\x88\x7f\xeb\x50\x98\x38\xf9\x5c\x96\x2b\x96\x70\xfe\xc6\xff\xc6\xff\x9f\x32\x1f\x58\x1e\x00\xd3\x80"
mu.mem_write(BASE, shellcode)//载入需模拟的代码指令
mu.reg_write(UC_X86_REG_ESP, STACK_ADDR + STACK_SIZE // 2)#设置栈指针 def syscall_num_to_name(num):
syscalls = {1: "sys_exit", 15: "sys_chmod"}
return syscalls[num] def hook_code(mu, address, size, user_data):#hook代码 # print('>>> Tracing instruction at 0x%x, instruction size = 0x%x' %(address, size)) machine_code = mu.mem_read(address, size)
for code in md.disasm(machine_code,address):
print(" 0x%x:\t%s\t%s" % (code.address, code.mnemonic, code.op_str))
if machine_code == b"\xcd\x80": r_eax = mu.reg_read(UC_X86_REG_EAX)
r_ebx = mu.reg_read(UC_X86_REG_EBX)
r_ecx = mu.reg_read(UC_X86_REG_ECX)
r_edx = mu.reg_read(UC_X86_REG_EDX)
syscall_name = syscall_num_to_name(r_eax)
print("--------------")
print("We intercepted system call: " + syscall_name) if syscall_name == "sys_chmod":
s = mu.mem_read(r_ebx, 20).split(b"\x00")[0]
print("arg0 = 0x%x -> %s" % (r_ebx, s))
print("arg1 = " + oct(r_ecx))
elif syscall_name == "sys_exit":
print("arg0 = " + hex(r_ebx))
exit()
mu.reg_write(UC_X86_REG_EIP, address + size) mu.hook_add(UC_HOOK_CODE, hook_code)//添加hook函数，每条指令执行前都先调用hook函数
mu.emu_start(BASE, BASE - 1)//开始执行
执行结果：
0x400000: call 0x400004
0x400004: inc eax
0x400006: pop ebp
0x400007: push 5
0x400009: pop ebx
0x40000a: sub ebp, ebx
0x40000c: add ebp, 0x4e
0x40000f: mov ecx, ebp
0x400011: push 2
0x400013: add ecx, dword ptr [esp]
0x400016: pop ebx
0x400017: xor edx, edx
0x400019: mov dx, 0x12
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40001d: mov edi, dword ptr [ecx]
0x40001f: shl edi, 0x10
0x400022: shr edi, 0x10
0x400025: sub ecx, 0xfffffffe
0x40002b: mov eax, dword ptr [ebp]
0x40002e: shl eax, 0x10
0x400031: shr eax, 0x10
0x400034: mov ebx, eax
0x400036: or ebx, edi
0x400038: and eax, edi
0x40003a: not eax
0x40003c: and eax, ebx
0x40003e: mov word ptr [ebp], ax
0x400042: add ebp, 2
0x400045: dec edx
0x400046: test edx, edx
0x400048: jne 0x40001d
0x40004e: cdq
0x40004f: push 0xf
0x400051: pop eax
0x400052: push edx
0x400053: call 0x400064
0x400064: pop ebx
0x400065: push 0x1b6
0x40006a: pop ecx
0x40006b: int 0x80
--------------
We intercepted system call: sys_chmod
arg0 = 0x400058 -> bytearray(b'/etc/shadow')
arg1 = 0o666
0x40006d: push 1
0x40006f: pop eax
0x400070: int 0x80
--------------
We intercepted system call: sys_exit
arg0 = 0x400058
练习使用Unicorn、Capstone的更多相关文章
- 反汇编工具capstone安装后import error
使用sudo pip install capstone后,使用如下代码import时出现error. from capstone import * 错误信息: File "/usr/loca ...
- puma vs passenger vs rainbows! vs unicorn vs thin 适用场景 及 performance
ruby的几个web server,按照开发活跃度.并发方案及要点.适用场景等分析puma vs passenger vs rainbows! vs unicorn vs thin. 1. thin: ...
- different between unicorn / unicorn_rails
$ unicorn_rails -h Usage: unicorn_rails [ruby options] [unicorn_rails options] [rackup config file] ...
- 利用Unicorn和Idaemu辅助解决Geekpwn SecretCode
在前面的些文章里,我提到了怎么交叉编译Unicorn-engine,以及在windows上使用Unicorn python bindings进行分析程序.这一次我介绍下如何使用Unicorn-engi ...
- Nginx + unicorn 运行多个Rails应用程序
PS:第一次写的很详细,可惜发布失败,然后全没了,这是第二次,表示只贴代码,剩下的自己领悟好了,这就是所谓的一鼓作气再而衰吧,希望没有第三次. 版本: ruby 2.1.0 rails 4.0.2 n ...
- unicorn与nginx通讯--[ruby unix socket]
[龍昌博客] http://www.xefan.com/archives/84146.html unicorn是如何与nginx通讯的——介绍ruby中的unix socket Ruby 应用服务典型 ...
- puppet master 用 nginx + unicorn 作为前端
目录 1. 概要 2. nginx + unicorn 配置 2.1. package 安装 2.2. 配置文件设置 2.2.1. 配置 unicorn 2.2.2. 配置nginx 2.3. 测试配 ...
- 复现 360 Unicorn Team 黑科技之 HackNFC
看了2条360 Unicorn Team的微博后,感觉蛮有趣的,打算复现一下 谷歌了下相关资料,在HACKADAY找到了介绍文章 还有2篇北邮工学硕士的论文,欢迎有兴趣的朋友和我一起交流~ 联系方式在 ...
- Setting up Unicorn with Nginx
gem install unicorn or gem 'unciron' 1 install Nginx yum install ... 2 Configuration vi /etc/nginx/n ...
随机推荐
- codevs1039整数的k划分-思考如何去重复
题目描述将整数n分成k份,且每份不能为空,任意两种划分方案不能相同(不考虑顺序).例如:n=7,k=3,下面三种划分方案被认为是相同的.1 1 51 5 15 1 1问有多少种不同的分法.输入描述输入 ...
- 如何使用 VuePress 搭建一个 element-ui 风格的文档网站
如何使用 VuePress 搭建一个 element-ui 风格的文档网站 { "devDependencies": { "vuepress": "1 ...
- UA 广告 All In One
UA 广告 All In One UA 广告是什么 广告投放 / 市场营销 互联网营销和分析专用名词速览 http://www.chinawebanalytics.cn/digital-marketi ...
- 读写 LED 作业 台灯的 频闪研究 2 评测&对比！
0. 读写 LED 作业 台灯的 频闪研究 2 评测&对比! 评测&对比图: 1. 日光:(中午12点) 2. Philips: (天猫 15元 5w E27白) 3. FSL: ( ...
- DB-Engines Ranking : Redis, MongoDB, MySQL
DB-Engines Ranking http://db-engines.com/en/ranking The DB-Engines Ranking ranks database management ...
- CSS3 Animation & linear-gradient & css3 var & @keyframes
CSS3 Animation & linear-gradient & css3 var & @keyframes https://www.zhangxinxu.com/word ...
- Serverless & Cloudflare Workers
Serverless & Cloudflare Workers https://dash.cloudflare.com/6f3d5e68ab80892a372313b7c9b02a85/wor ...
- windows10 WSL
搭建WSL linux下的home目录,映射windows的目录地址 用户家目录 ➜ ~ pwd /home/ajanuw C:\Users\ajanuw\AppData\Local\Packages ...
- vue页面切换过渡
<!--<transition name="slide-left">--> <router-view></router-view>& ...
- 什么是USDN稳定币？USDN的应用价值是什么？
9月22日,美国货币监理署(OCC)发布了一项稳定币指南,主要内容围绕的是稳定币的监管及相关规定.一时间,稳定币得到了市场上广泛的关注.那么,什么是稳定币呢?什么又是USDN稳定币呢? 1.什么是稳定 ...