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PUA_WEBCOMPANION.GB

September 26, 2018
 Analysis by: Johnlery Triunfante
 ALIASES:

a variant of Win32/LuluSoftware.A (NOD32); Riskware/LuluSoftware (Fortinet)

 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 may be manually installed by a user.

  TECHNICAL DETAILS

File Size:

32,671,536 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

15 Mar 2018

Arrival Details

This Potentially Unwanted Application may be manually installed by a user.

Installation

This Potentially Unwanted Application drops the following files:

  • %System Root%\{random hex}\DHtmlHeader.html
  • %System Root%\{random hex}\DisplayIcon.ico
  • %System Root%\{random hex}\Graphics\Print.ico
  • %System Root%\{random hex}\Graphics\Rotate{1-8}.ico
  • %System Root%\{random hex}\Graphics\Save.ico
  • %System Root%\{random hex}\Graphics\Setup.ico
  • %System Root%\{random hex}\Graphics\SysReqMet.ico
  • %System Root%\{random hex}\Graphics\SysReqNotMet.ico
  • %System Root%\{random hex}\Graphics\stop.ico
  • %System Root%\{random hex}\Graphics\warn.ico
  • %System Root%\{random hex}\ParameterInfo.xml
  • %System Root%\{random hex}\Setup.exe
  • %System Root%\{random hex}\SetupEngine.dll
  • %System Root%\{random hex}\SetupUi.dll
  • %System Root%\{random hex}\SetupUi.xsd
  • %System Root%\{random hex}\SetupUtility.exe
  • %System Root%\{random hex}\SplashScreen.bmp
  • %System Root%\{random hex}\Strings.xml
  • %System Root%\{random hex}\TMP{4 random hex}.tmp.exe.tmp\netfx_Full_GDR.mzz
  • %System Root%\{random hex}\TMP{4 random hex}.tmp.exe.tmp\netfx_Full_LDR.mzz
  • %System Root%\{random hex}\TMP{4 random hex}.tmp.exe.tmp\netfx_fullcab.msi
  • %System Root%\{random hex}\UiInfo.xml
  • %System Root%\{random hex}\header.bmp
  • %System Root%\{random hex}\sqmapi.dll
  • %System Root%\{random hex}\watermark.bmp
  • %System Root%\{random hex}\{4 random numbers}\LocalizedData.xml
  • %System Root%\{random hex}\{4 random numbers}\SetupResources.dll
  • %System Root%\{random hex}\{4 random number}\eula.rtf
  • %User Temp%\Setup Log {date installed} #001.txt
  • %User Temp%\dd_NDP451-KB2859818-Web_decompression_log.txt
  • %User Temp%\dd_TMP{4 random hex}.tmp_decompression_log.txt
  • %User Temp%\is-{4 random hex}.tmp\1.tmp
  • %User Temp%\is-{4 random hex}.tmp\DownloadUpdateInfo.exe
  • %User Temp%\is-{4 random hex}.tmp\DownloadUpdateInfo.tmp
  • %User Temp%\is-{4 random hex}.tmp\NDP451-KB2859818-Web.exe
  • %User Temp%\is-{4 random hex}.tmp\PDFArchitectAd2_English.bmp
  • %User Temp%\is-{4 random hex}.tmp\_isetup\_shfoldr.dll
  • %User Temp%\is-{4 random hex}.tmp\dotNetFx451SetupLog_{date and time installed}-MSI_netfx_Full_GDR_x86.msi.txt
  • %User Temp%\is-{4 random hex}.tmp\dotNetFx451SetupLog_{date and time installed}.txt
  • %User Temp%\is-{4 random hex}.tmp\idp.dll
  • %User Temp%\is-{4 random hex}.tmp\lsop.exe
  • %User Temp%\is-{4 random hex}.tmp\update-info.txt

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)

Other System Modifications

This Potentially Unwanted Application adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
Owner = {hex values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
SessionHash = {hex values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
Sequence = 1

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
RegFiles0000 = %Windows%\Microsoft.NET\Framework\v4.0.30319\CORPerfMonExt.dll

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
RegFilesHash = {hex values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
RegFiles0000 = Windows%\Microsoft.NET\Framework\v4.0.30319\mscoreei.dll

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
RegFiles0000 = %System%\msvcr100_clr0400.dll

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0001
RegFiles0000 = %Windows%\Microsoft.NET\Framework\v4.0.30319\PerfCounter.dll

HKLM\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
PDFCreatorRestart =

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

  • http://{BLOCKED}e.{BLOCKED}ge.org/pdfcreator/update-info.txt
  • http://{BLOCKED}ad.{BLOCKED}ge.org/go/op/lsop.exe
  • http://{BLOCKED}l.{BLOCKED}ad.pdfforge.org:443

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

2.105.00

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

Identify and terminate files detected as PUA_WEBCOMPANION.GB

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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\RestartManager\Session0001
    • Owner = {hex values}
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0001
    • SessionHash = {hex values}
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0001
    • Sequence = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0001
    • RegFiles0000 = %Windows%\Microsoft.NET\Framework\v4.0.30319\CORPerfMonExt.dll
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0001
    • RegFilesHash = {hex values}
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0001
    • RegFiles0000 = Windows%\Microsoft.NET\Framework\v4.0.30319\mscoreei.dll
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0001
    • RegFiles0000 = %System%\msvcr100_clr0400.dll
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0001
    • RegFiles0000 = %Windows%\Microsoft.NET\Framework\v4.0.30319\PerfCounter.dll
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
    • PDFCreatorRestart

Step 5

Search and delete these files

[ 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.  
  • %System Root%\{random hex}\DHtmlHeader.html
  • %System Root%\{random hex}\DisplayIcon.ico
  • %System Root%\{random hex}\Graphics\Print.ico
  • %System Root%\{random hex}\Graphics\Rotate{1-8}.ico
  • %System Root%\{random hex}\Graphics\Save.ico
  • %System Root%\{random hex}\Graphics\Setup.ico
  • %System Root%\{random hex}\Graphics\SysReqMet.ico
  • %System Root%\{random hex}\Graphics\SysReqNotMet.ico
  • %System Root%\{random hex}\Graphics\stop.ico
  • %System Root%\{random hex}\Graphics\warn.ico
  • %System Root%\{random hex}\ParameterInfo.xml
  • %System Root%\{random hex}\Setup.exe
  • %System Root%\{random hex}\SetupEngine.dll
  • %System Root%\{random hex}\SetupUi.dll
  • %System Root%\{random hex}\SetupUi.xsd
  • %System Root%\{random hex}\SetupUtility.exe
  • %System Root%\{random hex}\SplashScreen.bmp
  • %System Root%\{random hex}\Strings.xml
  • %System Root%\{random hex}\TMP{4 random hex}.tmp.exe.tmp\netfx_Full_GDR.mzz
  • %System Root%\{random hex}\TMP{4 random hex}.tmp.exe.tmp\netfx_Full_LDR.mzz
  • %System Root%\{random hex}\TMP{4 random hex}.tmp.exe.tmp\netfx_fullcab.msi
  • %System Root%\{random hex}\UiInfo.xml
  • %System Root%\{random hex}\header.bmp
  • %System Root%\{random hex}\sqmapi.dll
  • %System Root%\{random hex}\watermark.bmp
  • %System Root%\{random hex}\{4 random numbers}\LocalizedData.xml
  • %System Root%\{random hex}\{4 random numbers}\SetupResources.dll
  • %System Root%\{random hex}\{4 random number}\eula.rtf
  • %User Temp%\Setup Log {date installed} #001.txt
  • %User Temp%\dd_NDP451-KB2859818-Web_decompression_log.txt
  • %User Temp%\dd_TMP{4 random hex}.tmp_decompression_log.txt
  • %User Temp%\is-{4 random hex}.tmp\1.tmp
  • %User Temp%\is-{4 random hex}.tmp\DownloadUpdateInfo.exe
  • %User Temp%\is-{4 random hex}.tmp\DownloadUpdateInfo.tmp
  • %User Temp%\is-{4 random hex}.tmp\NDP451-KB2859818-Web.exe
  • %User Temp%\is-{4 random hex}.tmp\PDFArchitectAd2_English.bmp
  • %User Temp%\is-{4 random hex}.tmp\_isetup\_shfoldr.dll
  • %User Temp%\is-{4 random hex}.tmp\dotNetFx451SetupLog_{date and time installed}-MSI_netfx_Full_GDR_x86.msi.txt
  • %User Temp%\is-{4 random hex}.tmp\dotNetFx451SetupLog_{date and time installed}.txt
  • %User Temp%\is-{4 random hex}.tmp\idp.dll
  • %User Temp%\is-{4 random hex}.tmp\lsop.exe
  • %User Temp%\is-{4 random hex}.tmp\update-info.txt

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA_WEBCOMPANION.GB. 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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