PUA_PCPERFORMERSOFT.GA

 Analysis by: Mar Philip Elaurza

 ALIASES:

Win32/PCPerformer.A potentially unwanted (ESET-NOD32), Win32:InstallBrain-CI [PUP] (Avast), PUA.RegCleanPro (Symantec)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size:

1,638,400 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

28 Mar 2016

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be manually installed by a user.

Installation

This Potentially Unwanted Application drops the following files:

  • %Windows%\Tasks\_DEFAULT.job - Windows XP and below
  • %System%\_DEFAULT - Windows Vista and above
  • %Windows%\Tasks\_UPDATES.job - Windows XP and below
  • %System%\_UPDATES - Windows Vista and above
  • %Application Data%\PerformerSoft\PC Performer\log_{date}.log
  • %User Temp%\Perflib_Perfdata_{number}.dat
  • %Application Data%\PerformerSoft\PC Performer\results.rcp

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Autostart Technique

This Potentially Unwanted Application adds the following registry entries to enable its automatic execution at every system startup:

HKCU\Software\Microsoft\
Windows\CurrentVersion\Run
RDReminder = %Program Files%\PC Performer\PCPerformer.exe -rem

The scheduled task executes the malware every:

  • 3:01 PM - _DEFAULT.job
  • 2:10 PM - _UPDATES.job

Other System Modifications

This Potentially Unwanted Application adds the following registry keys:

HKCU\Software
Licenses =

HKLM\SOFTWARE\Classes\
CLSID
{GUID} =

HKLM\SOFTWARE\Classes\
CLSID\{GUID}
InprocServer32 =

HKLM\SOFTWARE
PerformerSoft =

HKLM\SOFTWARE\PerformerSoft
PC Performer =

HKLM\SOFTWARE\PerformerSoft\
PC Performer
LANG =

HKCU\SOFTWARE
PerformerSoft =

HKCU\SOFTWARE\PerformerSoft
PC Performer =

HKCU\SOFTWARE\PerformerSoft\
PC Performer
LANG =

It adds the following registry entries:

HKCU\Software\Licenses
{K7C0DB872A3F777C0} = {Hex values}

HKCU\Software\Licenses
{R7C0DB872A3F777C0} = {Hex values}

HKLM\SOFTWARE\Classes\
CLSID\{GUID}\InprocServer32
ThreadingModel = Both

HKLM\SOFTWARE\PerformerSoft\
PC Performer
Expired = 0

HKCU\Software\PerformerSoft\
PC Performer
FirstRun = 1

HKCU\Software\PerformerSoft\
PC Performer
StartAutoScanPMUI = 0

HKCU\Software\PerformerSoft\
PC Performer
CurrentScanTime = {Hex values}

HKCU\Software\PerformerSoft\
PC Performer
SetChkREmovableMedia = 1

HKCU\Software\PerformerSoft\
PC Performer
SetChkSkipEmptyKeys = 1

HKCU\Software\PerformerSoft\
PC Performer
ImprovementProgram = 1

HKCU\Software\PerformerSoft\
PC Performer
StartWhenWinBoots = 1

HKCU\Software\PerformerSoft\
PC Performer
GoToSystemTrayOnClose = 0

HKCU\Software\PerformerSoft\
PC Performer
ConfirmBkUps = 1

HKCU\Software\PerformerSoft\
PC Performer
StartScan = 0

HKCU\Software\PerformerSoft\
PC Performer
StartMinimized = 0

HKCU\Software\PerformerSoft\
PC Performer
AutoRepair = 0

HKCU\Software\PerformerSoft\
PC Performer
StrLastScan = {Date}

HKCU\Software\PerformerSoft\
PC Performer
StrLastScanResults = 0

HKCU\Software\PerformerSoft\
PC Performer
StrLastOptimizeTime = N/A

HKCU\Software\PerformerSoft\
PC Performer
StrLatestRegDefrag = N/A

HKCU\Software\PerformerSoft\
PC Performer
StrLatestRestorePoint = N/A

HKCU\Software\PerformerSoft\
PC Performer
StrLastStartupOpt = N/A

HKCU\Software\PerformerSoft\
PC Performer
RegErrFoundTillDate = 0

HKCU\Software\PerformerSoft\
PC Performer
RegErrsFixedTillDate = 0

HKCU\Software\PerformerSoft\
PC Performer
RegErrsFixedLast = 0

HKCU\Software\PerformerSoft\
PC Performer
ScheduledTime = N/A

HKCU\Software\PerformerSoft\
PC Performer
NumTimesRCPRunned = 1

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

1.717.00

SSAPI PATTERN Date:

22 Mar 2016

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • RDReminder = %Program Files%\PC Performer\PCPerformer.exe -rem
  • In HKEY_CURRENT_USER\Software\Licenses
    • {K7C0DB872A3F777C0} = {Hex values}
  • In HKEY_CURRENT_USER\Software\Licenses
    • {R7C0DB872A3F777C0} = {Hex values}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{GUID}\InprocServer32
    • ThreadingModel = Both
  • In HKEY_LOCAL_MACHINE\SOFTWARE\PerformerSoft\PC Performer
    • Expired = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • FirstRun = 1
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StartAutoScanPMUI = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • CurrentScanTime = {Hex values}
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • SetChkREmovableMedia = 1
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • SetChkSkipEmptyKeys = 1
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • ImprovementProgram = 1
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StartWhenWinBoots = 1
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • GoToSystemTrayOnClose = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • ConfirmBkUps = 1
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StartScan = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StartMinimized = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • AutoRepair = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StrLastScan = {Date}
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StrLastScanResults = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StrLastOptimizeTime = N/A
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StrLatestRegDefrag = N/A
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StrLatestRestorePoint = N/A
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • StrLastStartupOpt = N/A
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • RegErrFoundTillDate = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • RegErrsFixedTillDate = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • RegErrsFixedLast = 0
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • ScheduledTime = N/A
  • In HKEY_CURRENT_USER\Software\PerformerSoft\PC Performer
    • NumTimesRCPRunned = 1

Step 4

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software
    • Licenses
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {GUID}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{GUID}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • PerformerSoft
  • In HKEY_LOCAL_MACHINE\SOFTWARE\PerformerSoft
    • PC Performer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\PerformerSoft\PC Performer
    • LANG
  • In HKEY_CURRENT_USER\SOFTWARE
    • PerformerSoft
  • In HKEY_CURRENT_USER\SOFTWARE\PerformerSoft
    • PC Performer
  • In HKEY_CURRENT_USER\SOFTWARE\PerformerSoft\PC Performer
    • LANG

Step 5

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Windows%\Tasks\_DEFAULT.job - Windows XP and below
  • %System%\_DEFAULT - Windows Vista and above
  • %Windows%\Tasks\_UPDATES.job - Windows XP and below
  • %System%\_UPDATES - Windows Vista and above
  • %Application Data%\PerformerSoft\PC Performer\log_{date}.log
  • %User Temp%\Perflib_Perfdata_{number}.dat
  • %Application Data%\PerformerSoft\PC Performer\results.rcp

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA_PCPERFORMERSOFT.GA. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


Did this description help? Tell us how we did.