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PUA.Win32.SlimWare.AK

March 18, 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:

704,304 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

18 Mar 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:

  • "%User Temp%\dup7677.tmp.exe" SI_LAUNCH=onreboot SI_CHNL=duscp2ndary SI_MODE=toaster SI_DELAY=5 @P2_ORIGIN=^SW2^xdm111 @P2=^SW2^^^ @UL_STUBID={GUID}
  • "%System Root%\Program Files\SlimCleaner Plus\SlimCleanerPlus.exe"
  • "%Program Files%\Google\Chrome\Application\chrome.exe" "http://www.{BLOCKED}eaner.com/register.php?{random characters}"
  • "%User Temp%\DriverUpdate-setup.exe" SI_LAUNCH=onreboot SI_CHNL=duscp2ndary SI_MODE=toaster SI_DELAY=5
  • %SystemRoot%\SYSTEM32\WISPTIS.EXE /ManualLaunch;
  • %System Root%\Program Files\SlimCleaner Plus\BsSndRpt.exe /i "%User Temp%\tmp6BFC.ini"
  • "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:1972 CREDAT:275457 /prefetch:2

It creates the following folders:

  • %AppDataLocal%\SlimWare Utilities Inc\SlimCleaner Plus\Logs4
  • %System Root%\Users\Public\Documents\Downloaded Installers
  • %AppDataLocal%\SlimWare Utilities Inc
  • %AppDataLocal%\Downloaded Installers
  • %System Root%\Users\Public\Documents\Downloaded Installers\{1E0D1B66-4A72-4C9F-8A62-37473FE7B7E9}
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
  • %Application Data%\Microsoft\Windows\IECompatCache
  • %AppDataLocal%\Downloaded Installers\{D1C23977-75AC-47B2-977E-B8A333C38A32}
  • %AppDataLocal%\SlimWare Utilities Inc\SlimCleaner Plus
  • %Application Data%\Microsoft\Windows\IECompatUACache
  • %User Temp%\SIOUT9636972
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions
  • %Application Data%\Microsoft\Windows\DNTException
  • %Application Data%\Microsoft\Windows\PrivacIE

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

Other System Modifications

This Potentially Unwanted Application deletes the following files:

  • %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico

(Note: %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).)

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc
MachineID = "\x9d\xc1\xe1\xe2\xd0$\x85I\x8b\x8e\x84\x0b\x9e\x8c\xa7\xc0"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
explorer
GlobalAssocChangedCounter = "12"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc\SlimCleaner Plus\InstallerData
browser = "chrome"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc\SlimCleaner Plus\InstallerData
upl = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc\SlimCleaner Plus\Registration
InstallationID = "-C\x02k\xcb\xe8\x11L\xac\xca\x14k5\xd0\xb1\xfc"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc\DriverUpdate\InstallerData
p2 = "^SW2^^^"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc\DriverUpdate\InstallerData
secondOfferOrigin = "^SW2^xdm111"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc\DriverUpdate\InstallerData
ul_stubid = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
SlimWare Utilities Inc\DriverUpdate\Registration
InstallationID = "(O\xf8\xcb.\xfe\x8fM\xad\xb0\xb4\xf3\xc4\xd4\x04"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
explorer
GlobalAssocChangedCounter = "13"

HKEY_CURRENT_USER\Software\BugSplat\
UserCredentials
UserName = ""

HKEY_CURRENT_USER\Software\BugSplat\
UserCredentials
UserEmail = ""

HKEY_CURRENT_USER\Software\BugSplat\
slimware\SlimCleanerPlus\4.2.2.73
PostDomain = "bugsplat.com"

HKEY_CURRENT_USER\Software\BugSplat\
slimware\SlimCleanerPlus\4.2.2.73
PostSubDomain = "slimware"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
BugSplat-slimware-SlimCleanerPlus
EventMessageFile = "%System Root%\Program Files\SlimCleaner Plus\BugSplatRc.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
BugSplat-slimware-SlimCleanerPlus
TypesSupported = "7"

Dropping Routine

This Potentially Unwanted Application drops the following files:

  • %User Temp%\tmp13FC.net64dmp
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{161E5357-0AC0-11EA-8328-005056BC5B9B}.dat
  • %User Temp%\dup7677.tmp.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{161E5359-0AC0-11EA-8328-005056BC5B9B}.dat
  • %User Temp%\DriverUpdate-setup.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
  • %AppDataLocal%\SlimWare Utilities Inc\SlimCleaner Plus\Logs4\Trace 2019-19-11 14-10-18.log
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{161E535A-0AC0-11EA-8328-005056BC5B9B}.dat
  • %User Temp%\slimwareCrash_111919_142040.zip
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions\en-US.6
  • %User Temp%\swu6537.tmp.msi
  • %AppDataLocal%\Downloaded Installers\{D1C23977-75AC-47B2-977E-B8A333C38A32}\setup.msi
  • %AppDataLocal%\Microsoft\Internet Explorer\imagestore\joppu72\imagestore.dat
  • %Program Files%\Google\Chrome\Application\debug.log
  • %User Temp%\SIOUT9636972\DriverUpdate-setup.msi
  • %System Root%\Users\Public\Documents\Downloaded Installers\{1E0D1B66-4A72-4C9F-8A62-37473FE7B7E9}\setup.msi
  • %User Temp%\DN6D5CQ0.xml
  • %User Temp%\tmp6BFC.ini

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

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

Identify and terminate files detected as PUA.Win32.SlimWare.AK

[ 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 3

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\Wow6432Node\SlimWare Utilities Inc
    • MachineID = "\x9d\xc1\xe1\xe2\xd0$\x85I\x8b\x8e\x84\x0b\x9e\x8c\xa7\xc0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer
    • GlobalAssocChangedCounter = "12"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SlimWare Utilities Inc\SlimCleaner Plus\InstallerData
    • browser = "chrome"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SlimWare Utilities Inc\SlimCleaner Plus\InstallerData
    • upl = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SlimWare Utilities Inc\SlimCleaner Plus\Registration
    • InstallationID = "-C\x02k\xcb\xe8\x11L\xac\xca\x14k5\xd0\xb1\xfc"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SlimWare Utilities Inc\DriverUpdate\InstallerData
    • p2 = "^SW2^^^"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SlimWare Utilities Inc\DriverUpdate\InstallerData
    • secondOfferOrigin = "^SW2^xdm111"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SlimWare Utilities Inc\DriverUpdate\InstallerData
    • ul_stubid = "{GUID}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SlimWare Utilities Inc\DriverUpdate\Registration
    • InstallationID = "(O\xf8\xcb.\xfe\x8fM\xad\xb0\xb4\xf3\xc4\xd4\x04"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer
    • GlobalAssocChangedCounter = "13"
  • In HKEY_CURRENT_USER\Software\BugSplat\UserCredentials
    • UserName = ""
  • In HKEY_CURRENT_USER\Software\BugSplat\UserCredentials
    • UserEmail = ""
  • In HKEY_CURRENT_USER\Software\BugSplat\slimware\SlimCleanerPlus\4.2.2.73
    • PostDomain = "bugsplat.com"
  • In HKEY_CURRENT_USER\Software\BugSplat\slimware\SlimCleanerPlus\4.2.2.73
    • PostSubDomain = "slimware"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\BugSplat-slimware-SlimCleanerPlus
    • EventMessageFile = "%System Root%\Program Files\SlimCleaner Plus\BugSplatRc.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\BugSplat-slimware-SlimCleanerPlus
    • TypesSupported = "7"

Step 4

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.
  • %User Temp%\tmp13FC.net64dmp
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{161E5357-0AC0-11EA-8328-005056BC5B9B}.dat
  • %User Temp%\dup7677.tmp.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{161E5359-0AC0-11EA-8328-005056BC5B9B}.dat
  • %User Temp%\DriverUpdate-setup.exe
  • %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
  • %AppDataLocal%\SlimWare Utilities Inc\SlimCleaner Plus\Logs4\Trace 2019-19-11 14-10-18.log
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{161E535A-0AC0-11EA-8328-005056BC5B9B}.dat
  • %User Temp%\slimwareCrash_111919_142040.zip
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions\en-US.6
  • %User Temp%\swu6537.tmp.msi
  • %AppDataLocal%\Downloaded Installers\{D1C23977-75AC-47B2-977E-B8A333C38A32}\setup.msi
  • %AppDataLocal%\Microsoft\Internet Explorer\imagestore\joppu72\imagestore.dat
  • %Program Files%\Google\Chrome\Application\debug.log
  • %User Temp%\SIOUT9636972\DriverUpdate-setup.msi
  • %System Root%\Users\Public\Documents\Downloaded Installers\{1E0D1B66-4A72-4C9F-8A62-37473FE7B7E9}\setup.msi
  • %User Temp%\DN6D5CQ0.xml
  • %User Temp%\tmp6BFC.ini

Step 5

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.
  • %AppDataLocal%\SlimWare Utilities Inc\SlimCleaner Plus\Logs4
  • %System Root%\Users\Public\Documents\Downloaded Installers
  • %AppDataLocal%\SlimWare Utilities Inc
  • %AppDataLocal%\Downloaded Installers
  • %System Root%\Users\Public\Documents\Downloaded Installers\{1E0D1B66-4A72-4C9F-8A62-37473FE7B7E9}
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
  • %Application Data%\Microsoft\Windows\IECompatCache
  • %AppDataLocal%\Downloaded Installers\{D1C23977-75AC-47B2-977E-B8A333C38A32}
  • %AppDataLocal%\SlimWare Utilities Inc\SlimCleaner Plus
  • %Application Data%\Microsoft\Windows\IECompatUACache
  • %User Temp%\SIOUT9636972
  • %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions
  • %Application Data%\Microsoft\Windows\DNTException
  • %Application Data%\Microsoft\Windows\PrivacIE

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.SlimWare.AK. 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:

Step 7

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.

  • %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico


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