PUP.Optional.AppMaster is Malwarebytes’ detection name for a potentially unwanted program that behaves like adware.
PUP.Optional.AppMaster displays advertisements not originating from the sites you are visiting. PUP.Optional.AppMaster is usually installed by bundlers.
Malwarebytes protects users from PUP.Optional.AppMaster by blocking the sites that promote the bundlers.
Malwarebytes can detect and remove PUP.Optional.AppMaster without further user interaction.
Should users wish to keep this program and exclude it from being detected in future scans, they can add the program to the exclusions list. Here’s how to do it.
If you want to allow the program to connect to the Internet, for example to fetch updates, also add an exclusion of the type Allow an application to connect to the internet and use the Browse button to select the file you wish to grant access.
Runkey:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run|AppMaster=%APPDATA%\appmaster\AppMaster.exe
Scheduled Tasks:
%SYSDIR%\Tasks\UpdatePrt
%WINDIR%\Tasks\UpdatePrt.job
Folder:
%appdata%\Roaming\AppMaster
A Malwarebytes log of removal will look similar to this:
Malwarebytes www.malwarebytes.com -Log Details- Scan Date: 9/13/18 Scan Time: 10:55 AM Log File: c314ff23-b732-11e8-a33c-00ffdcc6fdfc.json -Software Information- Version: 3.5.1.2522 Components Version: 1.0.441 Update Package Version: 1.0.6803 License: Premium -System Information- OS: Windows 7 Service Pack 1 CPU: x64 File System: NTFS User: {computername}\{username} -Scan Summary- Scan Type: Threat Scan Scan Initiated By: Manual Result: Completed Objects Scanned: 252102 Threats Detected: 7 Threats Quarantined: 7 Time Elapsed: 3 min, 11 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: 3 PUP.Optional.AppMaster, C:\Users\{username}\AppData\Roaming\AppMaster\Resources\PdfPro100, Delete-on-Reboot, [760], [559415],1.0.6803 PUP.Optional.AppMaster, C:\Users\{username}\AppData\Roaming\AppMaster\Resources, Delete-on-Reboot, [760], [559415],1.0.6803 PUP.Optional.AppMaster, C:\USERS\{username}\APPDATA\ROAMING\APPMASTER, Delete-on-Reboot, [760], [559415],1.0.6803 File: 4 PUP.Optional.AppMaster, C:\Users\{username}\AppData\Roaming\AppMaster\Resources\PdfPro100\shortcut.ico, Delete-on-Reboot, [760], [559415],1.0.6803 PUP.Optional.AppMaster, C:\Users\{username}\AppData\Roaming\AppMaster\AppMaster.exe, Delete-on-Reboot, [760], [559415],1.0.6803 PUP.Optional.AppMaster, C:\Users\{username}\AppData\Roaming\AppMaster\AppMaster.exe.config, Delete-on-Reboot, [760], [559415],1.0.6803 PUP.Optional.AppMaster, C:\Users\{username}\AppData\Roaming\AppMaster\pref.txt, Delete-on-Reboot, [760], [559415],1.0.6803 Physical Sector: 0 (No malicious items detected) WMI: 0 (No malicious items detected) (end)
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