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PUA.Win32.OneStep.B

January 21, 2020
 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 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:

1,161,210 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

21 Jan 2020

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 adds the following processes:

  • "%Program Files%\FILESU~1\OSWDVA~1.EXE" /s
  • %Program Files%\filesubmit\oswdvaz118.exe /s
  • "%Program Files%\FILESU~1\DEALIO~1.EXE" /S /V"/qn CHANNEL_ID=980496" /UM"http://www.{BLOCKED}o.com/vkits/dlv1/980496/Dealio Toolbar.msi"
  • %Program Files%\filesubmit\DealioKit1-stub-0.exe /S /V"/qn CHANNEL_ID=980496" /UM"http://www.{BLOCKED}o.com/vkits/dlv1/980496/Dealio Toolbar.msi"
  • "%System%\RKINST~1.EXE" -%System Root%170 /s
  • %System%\rkinstaller.exe -%System Root%170 /s
  • "%Program Files%\FILESU~1\VVSNInst.exe" /cfg:EZTH120601 /s
  • %Program Files%\filesubmit\VVSNInst.exe /cfg:EZTH120601 /s
  • http://home.{BLOCKED}es.com/home/
  • %Program Files%\filesubmit\gingerbreadzcr.zip\gingerbreadzcr.zip
  • %User Temp%\OSWAF32.tmp\OSWDVA~1.EXE -p oswdvaz118 /S /s
  • %User Temp%\OSWAF70.tmp\OSWDVA~1.EXE -p ONESTEP118 -p oswdvaz118 /S /s
  • "%User Temp%\nsiB01F.tmp\onestep.exe" "%User Temp%\nsiB01F.tmp\onestep.dll" Install "0 oswdvaz118"
  • "%Program Files%\OneStepSearch\onestep.exe" "%Program Files%\OneStepSearch\onestep.dll" Service
  • %System%\msiexec.exe /V
  • %System%\svchost.exe -k LocalServiceAndNoImpersonation
  • %Windows%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe
  • %Windows%\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
  • %System%\sppsvc.exe
  • "%System Root%\Program Files\Windows Media Player\wmpnetwk.exe"
  • %System%\svchost.exe -k WerSvcGroup
  • %System%\svchost.exe -k LocalSystemNetworkRestricted
  • %System%\svchost.exe -k LocalServiceNetworkRestricted
  • %System%\svchost.exe -k netsvcs
  • "%Program Files%\OneStepSearch\onestep.exe" "%Program Files%\OneStepSearch\onestep.dll" Main
  • MSIEXEC.EXE /i "%User Temp%\_isC6C7\Dealio Toolbar.msi" /qn CHANNEL_ID=980496 SETUPEXEDIR="%Program Files%\FILESU~1"
  • %Program Files%\VVSN\VVSN.exe /cfg:EZTH120601 /s
  • "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:3092 CREDAT:275457 /prefetch:2
  • %System%\WerFault.exe -u -p 960 -s 2896
  • %System%\WerFault.exe -u -p 1968 -s 212
  • %System%\WerFault.exe -u -p 888 -s 1880
  • %System%\WerFault.exe -u -p 888 -s 1872
  • %System%\WerFault.exe -u -p 888 -s 1884
  • %System%\WerFault.exe -u -p 888 -s 1868
  • %System%\WerFault.exe -u -p 888 -s 1864
  • %System%\WerFault.exe -u -p 852 -s 516
  • %System%\WerFault.exe -u -p 888 -s 1860
  • %System%\WerFault.exe -u -p 2912 -s 176
  • %System%\WerFault.exe -u -p 2912 -s 180
  • %System%\WerFault.exe -u -p 1320 -s 180
  • %System%\WerFault.exe -u -p 1320 -s 176
  • %System%\WerFault.exe -u -p 1600 -s 1232
  • %System%\WerFault.exe -u -p 1416 -s 1232

It creates the following folders:

  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\filesubmit
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
  • %User Temp%\8D8.WUT
  • %Application Data%\Microsoft\Windows\IECompatUACache
  • %Program Files%\OneStepSearch
  • %Program Files%\filesubmit
  • %Application Data%\Microsoft\Windows\IECompatCache
  • %User Profile%\AppData
  • %Program Files%\VVSN\URL1
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions
  • %Application Data%\Microsoft\Windows\PrivacIE
  • %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
  • %User Temp%\_isC6C7
  • %Program Files%\VVSN
  • %Application Data%\Microsoft\Windows\DNTException
  • %System Root%\Users
  • %Program Files%\filesubmit\gingerbreadzcr.zip
  • %Start Menu%\Programs\filesubmit

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %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).. %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).. %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).. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

This Potentially Unwanted Application registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\OneStep Search Service
ImagePath = "{random characters}"

It adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
Del41 = "cmd /c del %Windows%\SysWOW64\RKINST~1.EXE"

Other System Modifications

This Potentially Unwanted Application modifies the following file(s):

  • %Program Files%\VVSN\SET8B76.tmp

(Note: %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).)

It deletes the following files:

  • %User Temp%\VVSN.exe
  • %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
  • %Program Files%\filesubmit\gingerbreadzcr.zip\gingerbreadzcr.zip
  • %Program Files%\filesubmit\gingerbreadzcr.zip\UNWISE.EXE
  • %Program Files%\filesubmit\gingerbreadzcr.zip\fsi_uninstall.ico
  • %Windows%\LastGood.Tmp
  • %Program Files%\filesubmit\oswdvaz118.exe
  • %Program Files%\VVSN\vsn.cfg
  • %Program Files%\VVSN\vsn.cab
  • %Program Files%\filesubmit\DealioKit1-stub-0.exe
  • %Program Files%\filesubmit\H\xef\xbe\x84\x1ft2\xef\xbf\x8a\xef\xbe\x9d(\xef\xbf\xb6\xef\xbf\xbfwtN&@
  • %Program Files%\filesubmit\VVSNInst.exe
  • %User Temp%\nsiB01F.tmp
  • %Program Files%\filesubmit\gingerbreadzcr.zip\fsi_install.ico
  • %System%\rkinstaller.exe

(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).. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local 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).. %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.)

It deletes the following folders:

  • %User Temp%\nsiAFD0.tmp
  • %User Temp%\nsiB01F.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 adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\gingerbreadzcr.zip
DisplayName = "gingerbreadzcr.zip"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\gingerbreadzcr.zip
UninstallString = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
TempInstallDir = "%Program Files%\OneStepSearch"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\OneStepSearch
DisplayName = "OneStep Search 1.0 build 118"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\OneStepSearch
UninstallString = "%Program Files%\OneStepSearch\uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
Primary = "29985"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
DllPath = "%Program Files%\OneStepSearch\onestep.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
Version = "65554"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
Partner = "oswdvaz118"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
Src = "onestep"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
Initial = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
ShowToolbarButton = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
ShowBarSign = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Internet Explorer\SearchScopes\
{5B4C3B43-49B6-42A7-A602-F7ACDCA0D409}
DisplayName = "OneStep Search"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Internet Explorer\SearchScopes\
{5B4C3B43-49B6-42A7-A602-F7ACDCA0D409}
URL = "http://www.{BLOCKED}psearch.net/?prt=oswdvaz118&keywords={searchTerms}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
UpdateTimeH = "30761792"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch
UpdateTimeL = "36341932"

HKEY_LOCAL_MACHINE\SYSTEM\Setup\
SetupapiLogStatus
setupapi.app.log = "4096"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Run
VVSN = "%Program Files%\VVSN\VVSN.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\NetworkList\
Nla\Cache\Intranet
{89BCDCB3-5725-45A2-94AB-2D6B641209B0} = "\x00PV\xbc\x0f"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
cval = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\OneStep Search Service
DisplayName = "OneStep Search Service"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\OneStep Search Service
Start = "SERVICE_AUTO_START"

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch\TempInstallDir

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
OneStepSearch\FXInstalled

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Run\ISSetup

Dropping Routine

This Potentially Unwanted Application drops the following files:

  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH000a.TMP
  • %System%\~GLH0007.TMP
  • %Program Files%\filesubmit\~GLH0008.TMP
  • %Program Files%\OneStepSearch\onestep.dll
  • %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
  • %User Temp%\_isC6C7\_ISMSIDEL.INI
  • %Program Files%\VVSN\SET8B76.tmp
  • %Program Files%\OneStepSearch\uninstall.exe
  • %Program Files%\OneStepSearch\readme.html
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\filesubmit\Uninstall gingerbreadzcr.zip.lnk
  • %System%\GLBSINST.%$D
  • %Program Files%\OneStepSearch\onestep.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{7D60D00F-CDE8-11E9-91F5-005056BC4DBC}.dat
  • %User Temp%\_isC6C7\Dealio Toolbar.msi
  • %Windows%\Temp\temp.xpi
  • %User Temp%\_isC6C7\Setup.INI
  • %Program Files%\filesubmit\~GLH0004.TMP
  • %Program Files%\VVSN\URL1\vsn.cfg
  • %User Temp%\_MSI5166._IS
  • %Program Files%\filesubmit\~GLH0006.TMP
  • %Program Files%\filesubmit\gingerbreadzcr.zip\UNWISE.INI
  • %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{7D60D011-CDE8-11E9-91F5-005056BC4DBC}.dat
  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH0005.TMP
  • %Program Files%\OneStepSearch\home.js
  • %User Temp%\_isC6C7\0x0409.ini
  • %User Temp%\8D8.WUT\vvsn.cab
  • %Program Files%\OneStepSearch\osopt.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
  • %Program Files%\VVSN\vvsn.cfg
  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH0009.TMP
  • %Windows%\inf\setupapi.app.log
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{84C05BE8-CDE8-11E9-91F5-005056BC4DBC}.dat
  • %User Temp%\8D8.WUT\whenu.inf
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions\en-US.6
  • %Program Files%\VVSN\SET8B87.tmp
  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH000b.TMP
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\filesubmit\Install gingerbreadzcr.zip.lnk
  • %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec

(Note: %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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %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).. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other Details

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

  • http://www.{BLOCKED}o.com/vkits/dlv1/980496/Dealio%20Toolbar.msi
  • http://www.{BLOCKED}ntknowledge.com/campaignstatus.aspx?campaign_id=170
  • http://www.{BLOCKED}ntknowledge.com/ErrorPage.aspx?{random characters}
  • http://home.{BLOCKED}es.com/home
  • http://app.{BLOCKED}u.com
  • http://spweb.{BLOCKED}u.com
  • http://go.{BLOCKED}oft.com
  • http://www.{BLOCKED}es.com
  • http://upgrade.{BLOCKED}psearch.net
  • http://api.{BLOCKED}g.com
  • http://www.{BLOCKED}g.com
  • http://sqm.{BLOCKED}try.microsoft.com
  • http://ieonline.{BLOCKED}oft.com
  • {BLOCKED}8.80.136

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

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

Restart in Safe Mode

[ Learn More ]

Step 3

Identify and terminate files detected as PUA.Win32.OneStep.B

[ 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\Windows\CurrentVersion\RunOnce
    • Del41 = "cmd /c del %Windows%\SysWOW64\RKINST~1.EXE"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\gingerbreadzcr.zip
    • DisplayName = "gingerbreadzcr.zip"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\gingerbreadzcr.zip
    • UninstallString = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • TempInstallDir = "%Program Files%\OneStepSearch"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\OneStepSearch
    • DisplayName = "OneStep Search 1.0 build 118"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\OneStepSearch
    • UninstallString = "%Program Files%\OneStepSearch\uninstall.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • Primary = "29985"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • DllPath = "%Program Files%\OneStepSearch\onestep.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • Version = "65554"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • Partner = "oswdvaz118"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • Src = "onestep"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • Initial = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • ShowToolbarButton = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • ShowBarSign = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\SearchScopes\{5B4C3B43-49B6-42A7-A602-F7ACDCA0D409}
    • DisplayName = "OneStep Search"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\SearchScopes\{5B4C3B43-49B6-42A7-A602-F7ACDCA0D409}
    • URL = "http://www.{BLOCKED}psearch.net/?prt=oswdvaz118&keywords={searchTerms}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • UpdateTimeH = "30761792"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • UpdateTimeL = "36341932"
  • In HKEY_LOCAL_MACHINE\SYSTEM\Setup\SetupapiLogStatus
    • setupapi.app.log = "4096"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run
    • VVSN = "%Program Files%\VVSN\VVSN.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList\Nla\Cache\Intranet
    • {89BCDCB3-5725-45A2-94AB-2D6B641209B0} = "\x00PV\xbc\x0f"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
    • cval = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OneStep Search Service
    • DisplayName = "OneStep Search Service"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OneStep Search Service
    • Start = "SERVICE_AUTO_START"

Step 5

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH000a.TMP
  • %System%\~GLH0007.TMP
  • %Program Files%\filesubmit\~GLH0008.TMP
  • %Program Files%\OneStepSearch\onestep.dll
  • %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
  • %User Temp%\_isC6C7\_ISMSIDEL.INI
  • %Program Files%\VVSN\SET8B76.tmp
  • %Program Files%\OneStepSearch\uninstall.exe
  • %Program Files%\OneStepSearch\readme.html
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\filesubmit\Uninstall gingerbreadzcr.zip.lnk
  • %System%\GLBSINST.%$D
  • %Program Files%\OneStepSearch\onestep.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{7D60D00F-CDE8-11E9-91F5-005056BC4DBC}.dat
  • %User Temp%\_isC6C7\Dealio Toolbar.msi
  • %Windows%\Temp\temp.xpi
  • %User Temp%\_isC6C7\Setup.INI
  • %Program Files%\filesubmit\~GLH0004.TMP
  • %Program Files%\VVSN\URL1\vsn.cfg
  • %User Temp%\_MSI5166._IS
  • %Program Files%\filesubmit\~GLH0006.TMP
  • %Program Files%\filesubmit\gingerbreadzcr.zip\UNWISE.INI
  • %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{7D60D011-CDE8-11E9-91F5-005056BC4DBC}.dat
  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH0005.TMP
  • %Program Files%\OneStepSearch\home.js
  • %User Temp%\_isC6C7\0x0409.ini
  • %User Temp%\8D8.WUT\vvsn.cab
  • %Program Files%\OneStepSearch\osopt.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
  • %Program Files%\VVSN\vvsn.cfg
  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH0009.TMP
  • %Windows%\inf\setupapi.app.log
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{84C05BE8-CDE8-11E9-91F5-005056BC4DBC}.dat
  • %User Temp%\8D8.WUT\whenu.inf
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions\en-US.6
  • %Program Files%\VVSN\SET8B87.tmp
  • %Program Files%\filesubmit\gingerbreadzcr.zip\~GLH000b.TMP
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\filesubmit\Install gingerbreadzcr.zip.lnk
  • %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec

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.
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\filesubmit
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
  • %User Temp%\8D8.WUT
  • %Application Data%\Microsoft\Windows\IECompatUACache
  • %Program Files%\OneStepSearch
  • %Program Files%\filesubmit
  • %Application Data%\Microsoft\Windows\IECompatCache
  • %User Profile%\AppData
  • %Program Files%\VVSN\URL1
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions
  • %Application Data%\Microsoft\Windows\PrivacIE
  • %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
  • %User Temp%\_isC6C7
  • %Program Files%\VVSN
  • %Application Data%\Microsoft\Windows\DNTException
  • %System Root%\Users
  • %Program Files%\filesubmit\gingerbreadzcr.zip
  • %Start Menu%\Programs\filesubmit

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as PUA.Win32.OneStep.B. 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.

Step 8

Restore deleted/modified files and/or registry entries from backup

*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

    • %Program Files%\VVSN\SET8B76.tmp

Step 9

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\VVSN.exe
  • %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
  • %Program Files%\filesubmit\gingerbreadzcr.zip\gingerbreadzcr.zip
  • %Program Files%\filesubmit\gingerbreadzcr.zip\UNWISE.EXE
  • %Program Files%\filesubmit\gingerbreadzcr.zip\fsi_uninstall.ico
  • %Windows%\LastGood.Tmp
  • %Program Files%\filesubmit\oswdvaz118.exe
  • %Program Files%\VVSN\vsn.cfg
  • %Program Files%\VVSN\vsn.cab
  • %Program Files%\filesubmit\DealioKit1-stub-0.exe
  • %Program Files%\filesubmit\H\xef\xbe\x84\x1ft2\xef\xbf\x8a\xef\xbe\x9d(\xef\xbf\xb6\xef\xbf\xbfwtN&@
  • %Program Files%\filesubmit\VVSNInst.exe
  • %User Temp%\nsiB01F.tmp
  • %Program Files%\filesubmit\gingerbreadzcr.zip\fsi_install.ico
  • %System%\rkinstaller.exe

Step 10

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • TempInstallDir
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\OneStepSearch
    • FXInstalled
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run
    • ISSetup


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