InstallShield/PROXY Malware keeps returning

I've been dealing with this for awhile now, and am finally reaching out for some help. It took some time, but I eventually figured out I was infected with a malware/proxy virus. I was able to track it down to a corrupted InstallShield executable, and some rogue tasks (similar to this issue). Via MalwareBytes, I've been able to remove the offending executable, scheduler tasks and registry entries. However, the problem comes back every day or two. What's the best way go go about determining the root cause of what is reapplying itself to my system?

 

Running Win10 with all latest patches. Using MSE/WinDefender for virus protection.

Welcome aboard

 

Download Security Check from here or here and save it to your Desktop.

• Double-click SecurityCheck.exe
• Follow the onscreen instructions inside of the black box.
• A Notepad document should open automatically called checkup.txt; please post the contents of that document.

NOTE 1. If one of your security applications (e.g., third-party firewall) requests permission to allow DIG.EXE access the Internet, allow it to do so.
NOTE 2. SecurityCheck may produce some false warning(s), so leave the results reading to me.
NOTE 3. If you receive UNSUPPORTED OPERATING SYSTEM! ABORTED! message restart computer and Security Check should run

Please download Farbar Service Scanner (FSS) and run it on the computer with the issue.

• Make sure the following options are checked:
  
  • Internet Services
  • Windows Firewall
  • System Restore
  • Security Center/Action Center
  • Windows Update
  • Windows Defender
  • Other Services
• Press "Scan".
• It will create a log (FSS.txt) in the same directory the tool is run.
• Please copy and paste the log to your reply.

Please download MiniToolBox and run it.

Checkmark following boxes:

• Report IE Proxy Settings
• Report FF Proxy Settings
• List content of Hosts
• List IP configuration
• List Winsock Entries
• List last 10 Event Viewer log
• List Installed Programs
• List Devices (do NOT change any settings here)
• List Users, Partitions and Memory size
• List Restore Points

Click Go and post the result.

Please download Malwarebytes to your desktop.

• Double-click mb3-setup-1878.1878-3.5.1.2522.exe and follow the prompts to install the program.
• Then click Finish.
• Once the program has fully updated, select Scan Now on the Dashboard. Or select the Threat Scan from the Scan menu.
• If another update of the definitions is available, it will be implemented before the rest of the scanning procedure.
• When the scan is complete, make sure that all Threats are selected, and click Remove Selected.
• Restart your computer when prompted to do so.
• The Scan log is available throughout History ->Application logs. Please post it contents in your next reply.

Download Malwarebytes Anti-Rootkit (MBAR) to your desktop.

• Warning! Malwarebytes Anti-Rootkit needs to be run from an account with administrator rights.
• Double click on downloaded file. OK self extracting prompt.
• MBAR will start. Click "Next" to continue.
• Click in the following screen "Update" to obtain the latest malware definitions.
• Once the update is complete select "Next" and click "Scan".
• When the scan is finished and no malware has been found select "Exit".
• If malware was detected, make sure to check all the items and click "Cleanup". Reboot your computer.
• Open the MBAR folder located on your Desktop and paste the content of the following files in your next reply:
  
• "mbar-log-{date} (xx-xx-xx).txt"
• "system-log.txt"

NOTE. If you see This version requires you to completely exit the Anti Malware application message right click on the Malwarebytes Anti-Malware icon in the system tray and click on Exit.

Please download Rkill (courtesy of BleepingComputer.com) to your desktop.
There are 2 different versions. If one of them won't run then download and try to run the other one.
You only need to get one of these to run, not all of them. You may get warnings from your antivirus about this tool, ignore them or shutdown your antivirus.

rKill.exe: http://www.bleepingcomputer.com/download/rkill/dl/10/
iExplore.exe (renamed rKill.exe): http://www.bleepingcomputer.com/download/rkill/dl/11/

• Double-click on the Rkill desktop icon to run the tool.
• If using Windows Vista, 7 or 8 right-click on it and choose Run As Administrator.
• A black DOS box will briefly flash and then disappear. This is normal and indicates the tool ran successfully.
• If not, delete the file, then download and use the one provided in Link 2.
• Do not reboot until instructed.
• If the tool does not run from any of the links provided, please let me know.

If normal mode still doesn't work, run the tool from safe mode.

When the scan is done Notepad will open with rKill log.
Post it in your next reply.

NOTE. rKill.txt log will also be present on your desktop.

NOTE Do NOT wrap your logs in "quote" or "code" brackets.
Do NOT use spoilers.
Do NOT edit your reply to post additional logs. Create new reply. I'll not get any email notifications about edits so I won't know you posted something new.

Edited by YankeeZulu, 12 February 2017 - 05:08 PM.