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PUA_REGCLEAN

July 07, 2015
 ALIASES:

a variant of Win32/Systweak potentially unwanted (ESET-NOD32)

 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:

3,662,632 bytes

File Type:

EXE

Initial Samples Received Date:

29 Apr 2015

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:

  • %System%\roboot.exe
  • %User Temp%\is-B9C19.tmp\_isetup\_shfoldr.dll
  • %Application Data%\Nico Mak Computing\WinZip Registry Optimizer\Version 1\results.rcp
  • %Windows%\Tasks\WinZip Registry Optimizer_UPDATES.job
  • %Windows%\Tasks\WinZip Registry Optimizer_DEFAULT.job
  • %All Users Profile%\Desktop\WinZip Registry Optimizer.lnk
  • %All Users Profile%\Start Menu\Programs\WinZip Registry Optimizer\WinZip Registry Optimizer.lnk
  • %All Users Profile%\Start Menu\Programs\WinZip Registry Optimizer\Uninstall WinZip RegistrRy Optimizer.lnk
  • %Program Files%\WinZip Registry Optimizer\Chinese_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\CleanSchedule.exe
  • %Program Files%\WinZip Registry Optimizer\Danish_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\Dutch_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\eng_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\Finnish_rcp_fi.ini
  • %Program Files%\WinZip Registry Optimizer\French_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\German_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\greek_rcp_el.ini
  • %Program Files%\WinZip Registry Optimizer\isxdl.dll
  • %Program Files%\WinZip Registry Optimizer\Italian_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\Japanese_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\korean_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\Norwegian_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\polish_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\portugese_rcp_pt.ini
  • %Program Files%\WinZip Registry Optimizer\Portuguese_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\russian_rcp_ru.ini
  • %Program Files%\WinZip Registry Optimizer\Spanish_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\Swedish_rcp.ini
  • %Program Files%\WinZip Registry Optimizer\TraditionalCn_rcp_zh-tw.ini
  • %Program Files%\WinZip Registry Optimizer\turkish_uninst_tr.ini
  • %Program Files%\WinZip Registry Optimizer\unins000.da
  • %Program Files%\WinZip Registry Optimizer\unins000.exe
  • %Program Files%\WinZip Registry Optimizer\unins000.msg
  • %Program Files%\WinZip Registry Optimizer\Winzipro.dll
  • %Program Files%\WinZip Registry Optimizer\Winzipro.exe
  • %Program Files%\WinZip Registry Optimizer\xmllite.dll

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %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.. %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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

Autostart Technique

This potentially unwanted application adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WROReminder = %Program Files%\WinZip Registry Optimizer\Winzipro.exe -rem

Other System Modifications

This potentially unwanted application adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\Licenses

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{82F3CB4B-FDE3-B323-7D80-F5834508021C}

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{82F3CB4B-FDE3-B323-7D80-F5834508021C}\InProcServer32

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{82F3CB4B-FDE3-B323-7D80-F5834508021C}\Containers

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{82F3CB4B-FDE3-B323-7D80-F5834508021C}\Containers\
{19E4A5AA-5662-4FC5-A0C0-1758028E1057}

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{82F3CB4B-FDE3-B323-7D80-F5834508021C}\Containers\
{537396C6-2D8A-4BB6-9BF8-2F0A8E2A3ADF}