WinDBG-Cheatsheet

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WinDBG-Cheatsheet

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WinDBG notes and commands cheatsheet

WinDBG-Cheatsheet 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# WinDBG Cheatsheet

* [Setup](#setup)
    * [Symbols](#symbols)
* [Command Reference](#command-reference)
    * [Registers](#registers)
    * [Memory](#memory)
    * [Strings](#strings)
    * [Breakpoints](#breakpoints)
    * [Tracing](#tracing)
    * [Disassembly](#disassembly)
    * [Modules](#modules)
* [NTAPI Structures](#ntapi-structures)

## Setup

### Symbols

Download symbols locally
```
.symfix+ c:\symbols
.reload
```

## Command Reference

### Registers

| Function | Command | Examples |
| --------------------- | ----------------- | ----------- |
| show all registers | `r` | - |
| show registry content | `r <reg>,[<reg>]` | `r rax,rsp` |
| set registry value | `r @<reg>=<val>` | `r @rax=0` |

### Memory

| Function | Command | Type / Size | Examples |
| ------------------------------------------- | -------------------- | --------------------- | -------------- |
| display memory at address | `d* <addr> [format]` | bytes: `db` words:`dw` dwords: `dd` qwords: `dq` pointer: `dp` | `db @rax L4` |
| edit memory at address | `e* <addr> <val> [<val> ...]` | bytes: `eb` word: `ew` dword: `ed` qword: `eq` pointer `ep` | `eb @ip a3 b6 c9` |
| show protection attributes | `!vprot <addr>` | memory page | |
| dereference memory at address | `d* poi(<addr>)` | | `dq poi(@rax)` |

### Strings

| Function | Command | Type / Size | Examples |
| ------------------------------------------- | -------------------- | --------------------- | -------- |
| display string at address | `d* <addr>` | ascii: `da` unicode:`du` | `da 7ffe040d0110` |
| edit string at address | `e* <addr> <val> [<val> ...]` | ascii: `ea` unicode:`eu` | `ea 7ffe040d0110 "AAAA"` |

### Breakpoints

| Function                                                           | Command | Examples                    |
| ------------------------------------------------------------------ | ------- | -------------------------- |
| set a breakpoint                                                   | `bp`    | `bp kernel32!VirtualAlloc` |
| set unresolved breakpoint (becomes `bp` when the module is loaded) | `bu`    | `bu test!TestFunc`         |
| set breakpoint on module function[s] using pattern                 | `bm`    | `bm wow64!*`               |
| clear all breakpoints                                              | `bc`    | `bc *`                     |

### Tracing

| Function | Command |
| ------------------------------------------- | ---------- |
| go (or resume execution) | `g` (F5) |
| single step | `p` (F10) |
| step to address | `p <addr>` |
| toggle display of registers after each step | `pr` |

### Disassembly

| Function | Command | Examples |
| -------------------------------- | -------------- | ------------------------------ |
| unassemble | `u <name/addr>` | `u kernel32!VirtualAlloc+0x4f` |
| unassemble from address at pointer | `u poi(<addr>)` | `u poi(777a9228)` |
| unassemble function with offsets | `uf /o [addr]` | `uf /o amsi!AmsiOpenSession` |

### Modules

| Function | Command | Examples |
| --------------------------------- | ----------------- | ------------- |
| list loaded (or deferred) modules | `lm` | - |
| check if a module is loaded | `lm m <module>` | `lm m amsi` |
| break when a module is loaded | `sxe ld <module>` | `sxe ld amsi` |
| show functions exported by the module (reads EAT) | `x <module>!<regex>` | `x ntdll!*Allocate*` |

## NTAPI Structures

| Command | Function | Examples |
| ----------------- | --------------------------------- | ------------- |
| `r $teb` | display TEB base address | - |
| `r $peb` | display PEB base address | - |
| `dt ntdll!_PEB @$peb` | display type `ntdll!_PEB` starting from address stored in `$peb` | - |
| `dt ntdll!_PEB @$peb <struct>-><pointed struct>->...` | display sub structures starting from PEB | `dt ntdll!_PEB @$peb Ldr->InMemoryOrderModuleList` |
| `!list -x "dt <type> <attribute[s]>" <base_addr>` | use link extension to traverse linked list starting at base address | `!list -x "dt _LDR_DATA_TABLE_ENTRY BaseDllName" 0x0001ed...` |

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