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PUA.Win32.Softcnapp.ASRKZ

April 08, 2022
 Analysis by: Patrick Noel Collado
 ALIASES:

RiskTool.Win32.PsKill.k (Kaspersky)

 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:

76860168 bytes

File Type:

EXE

Memory Resident:

Yes

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:

  • C:\DSIC\DigitWare_WEBOE_Setup\__tmp_rar_sfx_access_check_83056773
  • C:\DSIC\DigitWare_WEBOE_Setup\MDAC28\mdac_typ.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\WindowsInstaller3_1\WindowsInstaller-KB893803-v2-x86.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\WSE3_0\Microsoft WSE 3.0 Runtime.msi
  • C:\DSIC\DigitWare_WEBOE_Setup\pskill.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\DotNetFX40\dotNetFx40LP_Full_x86_x64zh-Hant.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\DotNetFX40\dotNetFx40_Full_x86_x64.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\beforeSetup.bat
  • C:\DSIC\DigitWare_WEBOE_Setup\setup.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\WEBOE_Setup.msi
  • %Local Temp%\VSD7316.tmp\install.log
  • %Local Temp%\VSD7316.tmp\setup.exe
  • %Local Temp%\VSD7316.tmp\DotNetFX40\dotNetFx40LP_Full_x86_x64zh-Hant.exe
  • C:\{Random Characters}\netfx_CoreLP_x64.msi
  • C:\{Random Characters}\netfx_CoreLP_x86.msi
  • C:\{Random Characters}\header.bmp
  • C:\{Random Characters}\SplashScreen.bmp
  • C:\{Random Characters}\watermark.bmp
  • C:\{Random Characters}\DisplayIcon.ico
  • C:\{Random Characters}\Graphics\Print.ico
  • C:\{Random Characters}\Graphics\Rotate1.ico
  • C:\{Random Characters}\Graphics\Rotate2.ico
  • C:\{Random Characters}\Graphics\Rotate3.ico
  • C:\{Random Characters}\Graphics\Rotate4.ico
  • C:\{Random Characters}\Graphics\Rotate4.ico
  • C:\{Random Characters}\Graphics\Rotate6.ico
  • C:\{Random Characters}\Graphics\Rotate7.ico
  • C:\{Random Characters}\Graphics\Rotate8.ico
  • C:\{Random Characters}\Graphics\Save.ico
  • C:\{Random Characters}\Graphics\Setup.ico
  • C:\{Random Characters}\Graphics\stop.ico
  • C:\{Random Characters}\Graphics\SysReqMet.ico
  • C:\{Random Characters}\Graphics\SysReqNotMet.ico
  • C:\{Random Characters}\Graphics\warn.ico
  • C:\{Random Characters}\1033\LocalizedData.xml
  • C:\{Random Characters}\ClientLP\Parameterinfo.xml
  • C:\{Random Characters}\ExtendedLP\Parameterinfo.xml
  • C:\{Random Characters}\ParameterInfo.xml
  • C:\{Random Characters}\Strings.xml
  • C:\{Random Characters}\ClientLP\UiInfo.xml
  • C:\{Random Characters}\ExtendedLP\UiInfo.xml
  • C:\{Random Characters}\UiInfo.xml
  • C:\{Random Characters}\SetupUi.xsd
  • C:\{Random Characters}\DHtmlHeader.html
  • C:\{Random Characters}\1033\eula.rtf
  • C:\{Random Characters}\Setup.exe
  • C:\{Random Characters}\SetupUtility.exe
  • C:\{Random Characters}\SetupUtility.exe
  • C:\{Random Characters}\1033\SetupResources.dll
  • C:\{Random Characters}\SetupUi.dll
  • C:\{Random Characters}\sqmapi.dll
  • C:\{Random Characters}\netfx_CoreLP.mzz
  • C:\{Random Characters}\netfx_ExtendedLP.mzz
  • %Local Temp%\HFI1417.tmp.html

It adds the following processes:

  • cmd /c ""C:\DSIC\DigitWare_WEBOE_Setup\beforeSetup.bat" "
  • pskill.exe iexplore.exe
  • setup.exe
  • "%Local Temp%\VSD7316.tmp\DotNetFX40\dotNetFx40LP_Full_x86_x64zh-Hant.exe" /q /norestart /ChainingPackage FullX64ClickOnce
  • C:\{Random Characters}\netfx_ExtendedLP_x64.msi
  • C:\{Random Characters}\netfx_ExtendedLP_x86.msi
  • C:\{Random Characters}\Setup.exe /q /norestart /ChainingPackage FullX64ClickOnce /x86 /x64 /lcid 1028
  • "%System%\msiexec.exe" -I "C:\DSIC\DigitWare_WEBOE_Setup\WEBOE_Setup.msi"
  • cacls C:\DSIC\DigitWare /E /T /G Everyone:F
  • icacls C:\DSIC\DigitWare /grant Everyone:(F) /t

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It creates the following folders:

  • C:\{Random Characters}\1028
  • C:\{Random Characters}\1033
  • C:\{Random Characters}\ClientLP
  • C:\{Random Characters}\ExtendedLP
  • C:\{Random Characters}\Graphics
  • C:\{Random Characters}

Other System Modifications

This Potentially Unwanted Application deletes the following files:

  • C:\{Random Characters}\netfx_CoreLP_x64.msi
  • C:\{Random Characters}\netfx_CoreLP_x86.msi
  • C:\{Random Characters}\netfx_ExtendedLP_x64.msi
  • C:\{Random Characters}\netfx_ExtendedLP_x86.msi
  • C:\{Random Characters}\header.bmp
  • C:\{Random Characters}\SplashScreen.bmp
  • C:\{Random Characters}\watermark.bmp
  • C:\{Random Characters}\DisplayIcon.ico
  • C:\{Random Characters}\Graphics\Print.ico
  • C:\{Random Characters}\Graphics\Rotate1.ico
  • C:\{Random Characters}\Graphics\Rotate2.ico
  • C:\{Random Characters}\Graphics\Rotate3.ico
  • C:\{Random Characters}\Graphics\Rotate4.ico
  • C:\{Random Characters}\Graphics\Rotate5.ico
  • C:\{Random Characters}\Graphics\Rotate6.ico
  • C:\{Random Characters}\Graphics\Rotate7.ico
  • C:\{Random Characters}\Graphics\Rotate8.ico
  • C:\{Random Characters}\Graphics\Save.ico
  • C:\{Random Characters}\Graphics\Setup.ico
  • C:\{Random Characters}\Graphics\stop.ico
  • C:\{Random Characters}\Graphics\SysReqMet.ico
  • C:\{Random Characters}\Graphics\SysReqNotMet.ico
  • C:\{Random Characters}\Graphics\warn.ico
  • C:\{Random Characters}\1033\LocalizedData.xml
  • C:\{Random Characters}\1028\LocalizedData.xml
  • C:\{Random Characters}\ClientLP\Parameterinfo.xml
  • C:\{Random Characters}\ExtendedLP\Parameterinfo.xml
  • C:\{Random Characters}\ParameterInfo.xml
  • C:\{Random Characters}\Strings.xml
  • C:\{Random Characters}\ClientLP\UiInfo.xml
  • C:\{Random Characters}\ExtendedLP\UiInfo.xml
  • C:\{Random Characters}\UiInfo.xml
  • C:\{Random Characters}\SetupUi.xsd
  • C:\{Random Characters}\DHtmlHeader.html
  • C:\{Random Characters}\1033\eula.rtf
  • C:\{Random Characters}\1028\eula.rtf
  • C:\{Random Characters}\Setup.exe
  • C:\{Random Characters}\SetupUtility.exe
  • C:\{Random Characters}\SetupEngine.dll
  • C:\{Random Characters}\1033\SetupResources.dll
  • C:\{Random Characters}\1028\SetupResources.dll
  • C:\{Random Characters}\SetupUi.dll
  • C:\{Random Characters}\sqmapi.dll
  • C:\{Random Characters}\netfx_CoreLP.mzz
  • C:\{Random Characters}\netfx_ExtendedLP.mzz

It deletes the following folders:

  • C:\{Random Characters}\1028
  • C:\{Random Characters}\1033
  • C:\{Random Characters}\ClientLP
  • C:\{Random Characters}\ExtendedLP
  • C:\{Random Characters}\Graphics
  • C:\{Random Characters}

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer
GlobalAssocChangedCounter = 25

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.503.00

SSAPI PATTERN Date:

07 Apr 2022

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

Identify and terminate files detected as PUA.Win32.Softcnapp.ASRKZ

[ 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
    • GlobalAssocChangedCounter = 25

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.
  • C:\DSIC\DigitWare_WEBOE_Setup\__tmp_rar_sfx_access_check_83056773
  • C:\DSIC\DigitWare_WEBOE_Setup\MDAC28\mdac_typ.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\WindowsInstaller3_1\WindowsInstaller-KB893803-v2-x86.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\WSE3_0\Microsoft WSE 3.0 Runtime.msi
  • C:\DSIC\DigitWare_WEBOE_Setup\pskill.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\DotNetFX40\dotNetFx40LP_Full_x86_x64zh-Hant.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\DotNetFX40\dotNetFx40_Full_x86_x64.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\beforeSetup.bat
  • C:\DSIC\DigitWare_WEBOE_Setup\setup.exe
  • C:\DSIC\DigitWare_WEBOE_Setup\WEBOE_Setup.msi
  • %Local Temp%\VSD7316.tmp\install.log
  • %Local Temp%\VSD7316.tmp\setup.exe
  • %Local Temp%\VSD7316.tmp\DotNetFX40\dotNetFx40LP_Full_x86_x64zh-Hant.exe
  • C:\{Random Characters}\netfx_CoreLP_x64.msi
  • C:\{Random Characters}\netfx_CoreLP_x86.msi
  • C:\{Random Characters}\header.bmp
  • C:\{Random Characters}\SplashScreen.bmp
  • C:\{Random Characters}\watermark.bmp
  • C:\{Random Characters}\DisplayIcon.ico
  • C:\{Random Characters}\Graphics\Print.ico
  • C:\{Random Characters}\Graphics\Rotate1.ico
  • C:\{Random Characters}\Graphics\Rotate2.ico
  • C:\{Random Characters}\Graphics\Rotate3.ico
  • C:\{Random Characters}\Graphics\Rotate4.ico
  • C:\{Random Characters}\Graphics\Rotate4.ico
  • C:\{Random Characters}\Graphics\Rotate6.ico
  • C:\{Random Characters}\Graphics\Rotate7.ico
  • C:\{Random Characters}\Graphics\Rotate8.ico
  • C:\{Random Characters}\Graphics\Save.ico
  • C:\{Random Characters}\Graphics\Setup.ico
  • C:\{Random Characters}\Graphics\stop.ico
  • C:\{Random Characters}\Graphics\SysReqMet.ico
  • C:\{Random Characters}\Graphics\SysReqNotMet.ico
  • C:\{Random Characters}\Graphics\warn.ico
  • C:\{Random Characters}\1033\LocalizedData.xml
  • C:\{Random Characters}\ClientLP\Parameterinfo.xml
  • C:\{Random Characters}\ExtendedLP\Parameterinfo.xml
  • C:\{Random Characters}\ParameterInfo.xml
  • C:\{Random Characters}\Strings.xml
  • C:\{Random Characters}\ClientLP\UiInfo.xml
  • C:\{Random Characters}\ExtendedLP\UiInfo.xml
  • C:\{Random Characters}\UiInfo.xml
  • C:\{Random Characters}\SetupUi.xsd
  • C:\{Random Characters}\DHtmlHeader.html
  • C:\{Random Characters}\1033\eula.rtf
  • C:\{Random Characters}\Setup.exe
  • C:\{Random Characters}\SetupUtility.exe
  • C:\{Random Characters}\SetupUtility.exe
  • C:\{Random Characters}\1033\SetupResources.dll
  • C:\{Random Characters}\SetupUi.dll
  • C:\{Random Characters}\sqmapi.dll
  • C:\{Random Characters}\netfx_CoreLP.mzz
  • C:\{Random Characters}\netfx_ExtendedLP.mzz
  • %Local Temp%\HFI1417.tmp.html

Step 6

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.
  • C:\{Random Characters}\1028
  • C:\{Random Characters}\1033
  • C:\{Random Characters}\ClientLP
  • C:\{Random Characters}\ExtendedLP
  • C:\{Random Characters}\Graphics
  • C:\{Random Characters}

Step 7

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.Softcnapp.ASRKZ. 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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