AWS - STS Persistence

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STS

有关更多信息，请访问：

AWS - STS Enum

假设角色令牌

临时令牌无法列出，因此保持活动的临时令牌是一种维持持久性的方法。

aws sts get-session-token --duration-seconds 129600

# 使用 MFA
aws sts get-session-token \
--serial-number <mfa-device-name> \
--token-code <code-from-token>

# 硬件设备名称通常是设备背面的数字，例如 GAHT12345678
# 短信设备名称是 AWS 中的 ARN，例如 arn:aws:iam::123456789012:sms-mfa/username
# 虚拟设备名称是 AWS 中的 ARN，例如 arn:aws:iam::123456789012:mfa/username

角色链切换

角色链切换是一个被认可的 AWS 特性，通常用于保持隐蔽的持久性。它涉及能够 假设一个角色，然后假设另一个角色，可能以 循环的方式 还原到初始角色。每次假设角色时，凭证的过期字段都会刷新。因此，如果两个角色配置为相互假设，这种设置允许凭证的永久更新。

您可以使用这个 工具 来保持角色链切换：

./aws_role_juggler.py -h
usage: aws_role_juggler.py [-h] [-r ROLE_LIST [ROLE_LIST ...]]

optional arguments:
-h, --help            show this help message and exit
-r ROLE_LIST [ROLE_LIST ...], --role-list ROLE_LIST [ROLE_LIST ...]

请注意，来自该Github存储库的 find_circular_trust.py 脚本并不能找到角色链配置的所有方式。

从PowerShell执行角色玩弄的代码

```powershell # PowerShell script to check for role juggling possibilities using AWS CLI

Check for AWS CLI installation

if (-not (Get-Command "aws" -ErrorAction SilentlyContinue)) { Write-Error "AWS CLI is not installed. Please install it and configure it with 'aws configure'." exit }

Function to list IAM roles

function List-IAMRoles { aws iam list-roles --query "Roles[*].{RoleName:RoleName, Arn:Arn}" --output json }

Initialize error count

$errorCount = 0

List all roles

$roles = List-IAMRoles | ConvertFrom-Json

Attempt to assume each role

foreach ($role in $roles) { $sessionName = "RoleJugglingTest-" + (Get-Date -Format FileDateTime) try { $credentials = aws sts assume-role --role-arn $role.Arn --role-session-name $sessionName --query "Credentials" --output json 2>$null | ConvertFrom-Json if ($credentials) { Write-Host "Successfully assumed role: $($role.RoleName)" Write-Host "Access Key: $($credentials.AccessKeyId)" Write-Host "Secret Access Key: $($credentials.SecretAccessKey)" Write-Host "Session Token: $($credentials.SessionToken)" Write-Host "Expiration: $($credentials.Expiration)"

Set temporary credentials to assume the next role

$env:AWS_ACCESS_KEY_ID = $credentials.AccessKeyId $env:AWS_SECRET_ACCESS_KEY = $credentials.SecretAccessKey $env:AWS_SESSION_TOKEN = $credentials.SessionToken

Try to assume another role using the temporary credentials

foreach ($nextRole in $roles) { if ($nextRole.Arn -ne $role.Arn) { $nextSessionName = "RoleJugglingTest-" + (Get-Date -Format FileDateTime) try { $nextCredentials = aws sts assume-role --role-arn $nextRole.Arn --role-session-name $nextSessionName --query "Credentials" --output json 2>$null | ConvertFrom-Json if ($nextCredentials) { Write-Host "Also successfully assumed role: $($nextRole.RoleName) from $($role.RoleName)" Write-Host "Access Key: $($nextCredentials.AccessKeyId)" Write-Host "Secret Access Key: $($nextCredentials.SecretAccessKey)" Write-Host "Session Token: $($nextCredentials.SessionToken)" Write-Host "Expiration: $($nextCredentials.Expiration)" } } catch { $errorCount++ } } }

Reset environment variables

Remove-Item Env:\AWS_ACCESS_KEY_ID Remove-Item Env:\AWS_SECRET_ACCESS_KEY Remove-Item Env:\AWS_SESSION_TOKEN } else { $errorCount++ } } catch { $errorCount++ } }

Output the number of errors if any

if ($errorCount -gt 0) { Write-Host "$errorCount error(s) occurred during role assumption attempts." } else { Write-Host "No errors occurred. All roles checked successfully." }

Write-Host "Role juggling check complete."

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