Analysis by: Denisse Camille Layco

ALIASES:

PUA.Superfluss(NORTON); PUP/PCCleaner(PANDA)

 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.

  TECHNICAL DETAILS

File Size: 10,657,560 bytes
Memory Resident: No
Initial Samples Received Date: 15 Jan 2019

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.

Installation

This Potentially Unwanted Application drops the following files:

  • • %User Temp%\is-{5 random characters}.tmp\{filename}.tmp
  • • %User Temp%\is-{5 random characters}.tmp\_isetup\_shfoldr.dll
  • • %User Temp%\is-{5 random characters}.tmp\isskin.dll
  • • %User Temp%\is-{5 random characters}.tmp\Office2007.cjstyles
  • • %Program Files%\GSA Cleandrive\unins000.dat
  • • %Program Files%\GSA Cleandrive\is-{5 random characters}.tmp
  • • %Program Files%\GSA Cleandrive\is-{5 random characters}.tmp
  • • %Program Files%\GSA Cleandrive\is-{5 random characters}.tmp
  • • %Program Files%\GSA Cleandrive\is-{5 random characters}.tmp
  • • %Program Files%\GSA Cleandrive\is-{5 random characters}.tmp
  • • %Program Files%\GSA Cleandrive\is-{5 random characters}.tmp
  • • %Common Programs%\GSA Cleandrive\GSA Cleandrive.lnk
  • • %Common Programs%\GSA Cleandrive\ReadMe.lnk
  • • %Common Programs%\GSA Cleandrive\Cleandrive on the Web.lnk
  • • %Common Programs%\GSA Cleandrive\Feedback on the Web.lnk
  • • %Common Programs%\GSA Cleandrive\Order on the Web.lnk
  • • %Common Programs%\GSA Cleandrive\Uninstall Cleandrive.lnk
  • • %Desktop%\GSA Cleandrive.lnk
  • • %Application Data%\Microsoft\Internet Explorer\Quick Launch\GSA Cleandrive.lnk
  • • %Program Files%\GSA Cleandrive\cleandrive.url
  • • %Program Files%\GSA Cleandrive\feedback.url
  • • %Program Files%\GSA Cleandrive\order.url
  • • %Program Files%\GSA Cleandrive\unins000.msg
  • • %Program Files%\GSA Cleandrive\unins000.dat

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Common Programs% is the folder that contains common program groups for all users, which is usually C:\Documents and Settings\All Users\Start Menu\Programs on Windows 2000, XP, and Server 2003, or C:\ProgramData\Microsoft\Windows\Start Menu\Programs on Windows Vista, 7, and 8.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • • %User Temp%\is-{5 random characters}.tmp\{filename}.tmp
  • • "netsh.exe" advfirewall firewall add rule name="GSA Cleandrive" dir=out action=allow program="%Program Files%\GSA Cleandrive\CleanDrive.exe" description="GSA Cleandrive" enable=yes;

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Potentially Unwanted Application deletes the following files:

  • • %User Temp%\is-{5 random characters}.tmp\_isetup\_shfoldr.dll
  • • %User Temp%\is-{5 random characters}.tmp\isskin.dll
  • • %User Temp%\is-{5 random characters}.tmp\Office2007.cjstyles
  • • %User Temp%\is-{5 random characters}.tmp\{filename}.tmp

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It deletes the following folders:

  • • %User Temp%\is-{5 random characters}.tmp
  • • %User Temp%\is-{5 random characters}.tmp
  • • %User Temp%\is-{5 random characters}.tmp\_isetup

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
Owner = {Hex Values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
SessionHash = {Hex Values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
Sequence = 1

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
RegFiles{Numbers} = %Program Files%\GSA Cleandrive\CleanDrive.exe

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
RegFilesHash = {Hex Values}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Inno Setup: Setup Version = 5.5.5 (a)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Inno Setup: App Path = %Program Files%\GSA Cleandrive

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
InstallLocation = %Program Files%\GSA Cleandrive\

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Inno Setup: Icon Group = GSA Cleandrive

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Inno Setup: User = {Username}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Inno Setup: Selected Tasks = desktopicon,quicklaunchicon

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Inno Setup: Deselected Tasks =

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Inno Setup: Language = en

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
DisplayName = GSA Cleandrive v3.47

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
UninstallString = "%Program Files%\GSA Cleandrive\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
QuietUninstallString = "%Program Files%\GSA Cleandrive\unins000.exe" /SILENT

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
DisplayVersion = 3.47

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Publisher = GSA Software

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
URLInfoAbout = http://www.{BLOCKED}line.de

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
HelpTelephone = +{BLOCKED}006224

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
HelpLink = http://cleandrive.{BLOCKED}line.de/

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
URLUpdateInfo = http://cleandrive.{BLOCKED}line.de/

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Contact = http://www.{BLOCKED}line.de

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
Comments = © 2015 GSA Software - http://www.{BLOCKED}line.de

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
NoModify = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
NoRepair = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
InstallDate = {execution date}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
MajorVersion = 3

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
MinorVersion = 47

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1
EstimatedSize = 10403

It adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
GSA Cleandrive_is1

Adware Routine

This Potentially Unwanted Application deletes the following registry keys that were created during execution:

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
RegFilesHash =

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
RegFiles{Numbers} =

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
Sequence = 22842368

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
SessionHash =

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}
Owner =

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session{Numbers}

  SOLUTION

Minimum Scan Engine: 9.800
SSAPI PATTERN File: 2.143.00
SSAPI PATTERN Date: 31 Jan 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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 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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\GSA Cleandrive_is1

Step 4

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden folders in the search result.
  • %Program Files%\GSA Cleandrive
  • %Common Programs%\GSA Cleandrive

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.
  • %Desktop%\GSA Cleandrive.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\GSA Cleandrive.lnk

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.DriveCleaner.AA. 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 the following Trend Micro Support pages for more information:


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