PUP.Optional.UniversalPCMechanic

Short bio

PUP.Optional.UniversalPCMechanic is a detection for a so-called system optimizer. These “system optimizers” use intentional false positives to convince users that their Windows systems have problems. Then, they try to sell you their software, claiming it will remove these problems. The software is called Universal PC Mechanic, and it belongs to a family that started with Master PC Cleaner.

main GUI

GUI of Universal PC Mechanic

Symptoms

Universal PC Mechanic uses the Task Scheduler to run when any user logs on. Users may notice the icon in the system tray and the main GUI of the program.

scheduled task

Scheduled Task for Universal PC Mechanic

 

icons

Universal PC Mechanic icons

Type and source of infection

Programs in this family are promoted by fake online scanners and packaged in bundlers.

fake online scanner

Website trying to scare users into thinking their system is infected

Aftermath

Programs like this might give users a false sense of security, possibly exposing them to malware infections. Users should be aware that the telephone numbers displayed by the programs in this family have been found to act as tech support scammers.

Protection

Malwarebytes blocks the installation of Universal PC Mechanic by detecting the installer and blocking the websites that spread and sell this software.

block executable

Malwarebytes blocks the Universal PC Mechanic installer.

block website

Malwarebytes blocks the sites that make visitors think their systems are infected.

Remediation

Malwarebytes can detect and remove PUP.Optional.UniversalPCMechanic without further user interaction.

  1. Please download Malwarebytes to your desktop.
  2. Double-click mb3-setup-consumer-{version}.exe and follow the prompts to install the program.
  3. Then click Finish.
  4. Once the program has fully updated, select Scan Now on the Dashboard. Or select the Threat Scan from the Scan menu.
  5. If another update of the definitions is available, it will be implemented before the rest of the scanning procedure.
  6. When the scan is complete, make sure that all Threats are selected, and click Remove Selected.
  7. Restart your computer when prompted to do so.

Malwarebytes removal log

A Malwarebytes log of removal will look similar to this:

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 2/5/18
Scan Time: 9:15 AM
Log File: b58b0a42-0a4c-11e8-9439-080027750297.json
Administrator: Yes

-Software Information-
Version: 3.3.1.2183
Components Version: 1.0.262
Update Package Version: 1.0.3870
License: Premium

-System Information-
OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: {computername}\{username}

-Scan Summary-
Scan Type: Threat Scan
Result: Completed
Objects Scanned: 241428
Threats Detected: 64
Threats Quarantined: 64
Time Elapsed: 2 min, 47 sec

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

-Scan Details-
Process: 1
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\oscm.exe, Quarantined, [7622], [486080],1.0.3870

Module: 7
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\x64\SQLite.Interop.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\Interop.IWshRuntimeLibrary.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\Microsoft.TeamFoundation.Common.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\Microsoft.Win32.TaskScheduler.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\oscm.exe, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\System.Data.SQLite.DLL, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\TAFactory.IconPack.dll, Quarantined, [7622], [486080],1.0.3870

Registry Key: 7
PUP.Optional.UniversalPCMechanic, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\SCHEDULE\TASKCACHE\TREE\Universal PC Mechanic_Logon, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\SCHEDULE\TASKCACHE\TASKS\{C9BAE049-02D8-43A8-99F1-46825D4C3CDB}, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\SCHEDULE\TASKCACHE\LOGON\{C9BAE049-02D8-43A8-99F1-46825D4C3CDB}, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{0005F358-4516-4DC1-8E92-0210D7DDA29C}_is1, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.MasterPCCleaner, HKLM\SOFTWARE\SPCT-PR, Quarantined, [6571], [484509],1.0.3870
PUP.Optional.UniversalPCMechanic, HKCU\SOFTWARE\Universal PC Mechanic on {computername}, Quarantined, [7622], [486085],1.0.3870
PUP.Optional.MasterPCCleaner, HKLM\SOFTWARE\aHR0cDovL3d3dy5zbWFydHN5c3Rvb2xzLmNvbS8=, Quarantined, [6571], [440348],1.0.3870

Registry Value: 2
PUP.Optional.MasterPCCleaner, HKLM\SOFTWARE\SPCT-PR|PXL, Quarantined, [6571], [484509],1.0.3870
PUP.Optional.UniversalPCMechanic, HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{0005F358-4516-4DC1-8E92-0210D7DDA29C}_is1|DISPLAYNAME, Quarantined, [7622], [486086],1.0.3870

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 8
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\x64, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\x86, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\PROGRAM FILES\Universal PC Mechanic on {computername}, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\PROGRAMDATA\MICROSOFT\WINDOWS\START MENU\PROGRAMS\Universal PC Mechanic on {computername}, Quarantined, [7622], [486081],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\PROGRAMDATA\Universal PC Mechanic on {computername}, Quarantined, [7622], [486082],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Users\{username}\AppData\Roaming\Universal PC Mechanic on {computername}\smico, Quarantined, [7622], [486082],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\USERS\{username}\APPDATA\ROAMING\Universal PC Mechanic on {computername}, Quarantined, [7622], [486082],1.0.3870

File: 39
PUP.Optional.UniversalPCMechanic, C:\USERS\PUBLIC\DESKTOP\Universal PC Mechanic.lnk, Quarantined, [7622], [486083],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\PROGRAM FILES\Universal PC Mechanic on {computername}\unins000.dat, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\danish_apc_da.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\Dutch_apc_nl.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\english_apc_en.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\finish_apc_fi.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\French_apc_fr.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\german_apc_de.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\italian_apc_it.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\japanese_apc_ja.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\norwegian_apc_no.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\portuguese_apc_ptbr.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\russian_apc_ru.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\spanish_apc_es.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\langs\swedish_apc_sv.ini, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\x64\SQLite.Interop.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\x86\SQLite.Interop.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\AppRes.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\HtmlRenderer.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\HtmlRenderer.WinForms.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\Interop.IWshRuntimeLibrary.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\Microsoft.TeamFoundation.Common.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\Microsoft.Win32.TaskScheduler.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\oscm.exe, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\oscm.exe.config, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\System.Data.SQLite.DLL, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\TAFactory.IconPack.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\TaskScheduler.dll, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\unins000.exe, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Program Files\Universal PC Mechanic on {computername}\unins000.msg, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\WINDOWS\SYSTEM32\TASKS\Universal PC Mechanic_Logon, Quarantined, [7622], [486080],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Universal PC Mechanic on {computername}\Buy Universal PC Mechanic.lnk, Quarantined, [7622], [486081],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Universal PC Mechanic on {computername}\Uninstall Universal PC Mechanic.lnk, Quarantined, [7622], [486081],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Universal PC Mechanic on {computername}\Universal PC Mechanic.lnk, Quarantined, [7622], [486081],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\ProgramData\Universal PC Mechanic on {computername}\mpc.db, Quarantined, [7622], [486082],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Users\{username}\AppData\Roaming\Universal PC Mechanic on {computername}\Errorlog.txt, Quarantined, [7622], [486082],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Users\{username}\AppData\Roaming\Universal PC Mechanic on {computername}\exlist.bin, Quarantined, [7622], [486082],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\Users\{username}\AppData\Roaming\Universal PC Mechanic on {computername}\res.xml, Quarantined, [7622], [486082],1.0.3870
PUP.Optional.UniversalPCMechanic, C:\USERS\{username}\DESKTOP\USMSETUP.EXE, Quarantined, [7622], [486087],1.0.3870

Physical Sector: 0
(No malicious items detected)

(end)

Add an exclusion

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.

The Exclusions tab includes a list of items to be excluded from scans. The items may include files, folders, websites, or applications that connect to the Internet, as well as previously detected exploits.

To access the exclusions in Malwarebytes:

  • Click on the Settings tab in the left pane.
  • Click on the Exclusions tab.
  • Click the Add Exclusion button.
  • Select the exclusion type Exclude a File or Folder and use the Browse button to select the main folder for the software that you wish to keep.
  • Repeat this for any secondary folder(s) that belong to the software.
  • If you want to allow the program to connect to the Internet, for example to fetch updates, add an exclusion of the type Exclude an application that Connects to the Internet and use the Browse button to select the file you wish to grant access.

Traces/IOC

Possible signs in FRST logs:

() C:\Program Files\Universal PC Mechanic on {computername}\oscm.exe
C:\Users\{username}\AppData\Roaming\Universal PC Mechanic on {computername}
C:\Windows\System32\Tasks\Universal PC Mechanic_Logon
C:\Users\Public\Desktop\Universal PC Mechanic.lnk
C:\ProgramData\Universal PC Mechanic on {computername}
C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Universal PC Mechanic on {computername}
C:\Program Files\Universal PC Mechanic on {computername}

Universal PC Mechanic (HKLM\…\{0005F358-4516-4DC1-8E92-0210D7DDA29C}_is1) (Version: 1.0.0.1344 – )
Task: {C9BAE049-02D8-43A8-99F1-46825D4C3CDB} – System32\Tasks\Universal PC Mechanic_Logon => C:\Program Files\Universal PC Mechanic on {computername}\oscm.exe [2018-01-31] ()

SHA256: 23B6303B4398C7525AF4F29152180D2551FFAB4310D3C856183A271DF5E31321
Domains: smartsystools.com, commcheck.info
Files: oscm.exe, usmsetup.exe

US phone number: 855-332-0124

The name of the program files folder for the programs in this family use the format {name of the program on %computername%}

Note: %computername% is an environmental variable that is different per computer.

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