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PUA.Win32.Solvusoft.AB

November 02, 2022
 Analysis by: Khristian Joseph Morales
 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:

6,301,088 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

31 Oct 2022

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 folders:

  • %Program Files%\DriverDoc
  • %User Temp%\is-{random}.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).. %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 drops the following files:

  • %User Temp%\is-{random}.tmp\{Malware Filename}.tmp
  • %User Temp%\is-{random}.tmp\setup.bmp
  • %Program Files%\DriverDoc\unins000.dat
  • %Program Files%\DriverDoc\Extra\is-{random}.tmp
  • %Program Files%\DriverDoc\is-{random}.tmp
  • %Common Programs%\DriverDoc\Help.lnk
  • %Desktop%\DriverDoc.lnk
  • %Common Programs%\DriverDoc\DriverDoc.lnk
  • %Common Programs%\DriverDoc\DriverDoc on the Web.url
  • %Common Programs%\DriverDoc\Uninstall DriverDoc.lnk
  • %Program Files%\DriverDoc\unins000.dat
  • %Application Data%\DriverDoc\program.log
  • %Program Files%\DriverDoc\77z.dll
  • %Program Files%\DriverDoc\7Brazilian.chm
  • %Program Files%\DriverDoc\7Brazilian.ini
  • %Program Files%\DriverDoc\7Danish.chm
  • %Program Files%\DriverDoc\7Danish.ini
  • %Program Files%\DriverDoc\7DriverDoc.exe
  • %Program Files%\DriverDoc\7Dutch.chm
  • %Program Files%\DriverDoc\7Dutch.ini
  • %Program Files%\DriverDoc\7English.chm
  • %Program Files%\DriverDoc\7English.ini
  • %Program Files%\DriverDoc\7Extra
  • %Program Files%\DriverDoc\7Finnish.chm
  • %Program Files%\DriverDoc\7Finnish.ini
  • %Program Files%\DriverDoc\7French.chm
  • %Program Files%\DriverDoc\7French.ini
  • %Program Files%\DriverDoc\7German.chm
  • %Program Files%\DriverDoc\7German.ini
  • %Program Files%\DriverDoc\7Italian.chm
  • %Program Files%\DriverDoc\7Italian.ini
  • %Program Files%\DriverDoc\7Japanese.chm
  • %Program Files%\DriverDoc\7Japanese.ini
  • %Program Files%\DriverDoc\7Norwegian.chm
  • %Program Files%\DriverDoc\7Norwegian.ini
  • %Program Files%\DriverDoc\7Polish.chm
  • %Program Files%\DriverDoc\7Polish.ini
  • %Program Files%\DriverDoc\7Portuguese.ch
  • %Program Files%\DriverDoc\7Portuguese.in
  • %Program Files%\DriverDoc\7Russian.chm
  • %Program Files%\DriverDoc\7Russian.ini
  • %Program Files%\DriverDoc\7Spanish.chm
  • %Program Files%\DriverDoc\7Spanish.ini
  • %Program Files%\DriverDoc\7sqlite3.dll
  • %Program Files%\DriverDoc\7Swedish.chm
  • %Program Files%\DriverDoc\7Swedish.ini
  • %Program Files%\DriverDoc\7unins000.dat
  • %Program Files%\DriverDoc\7unins000.exe
  • %Program Files%\DriverDoc\Extra\Brazilian.ini
  • %Program Files%\DriverDoc\Extra\Danish.ini
  • %Program Files%\DriverDoc\Extra\Dutch.ini
  • %Program Files%\DriverDoc\Extra\English.ini
  • %Program Files%\DriverDoc\Extra\Finnish.ini
  • %Program Files%\DriverDoc\Extra\French.ini
  • %Program Files%\DriverDoc\Extra\German.ini
  • %Program Files%\DriverDoc\Extra\Italian.ini
  • %Program Files%\DriverDoc\Extra\Japanese.ini
  • %Program Files%\DriverDoc\Extra\Norwegian.ini
  • %Program Files%\DriverDoc\Extra\Polish.ini
  • %Program Files%\DriverDoc\Extra\Portuguese.ini
  • %Program Files%\DriverDoc\Extra\Russian.ini
  • %Program Files%\DriverDoc\Extra\Settings.ini
  • %Program Files%\DriverDoc\Extra\Spanish.ini
  • %Program Files%\DriverDoc\Extra\Swedish.ini
  • %Program Files%\DriverDoc\Extra\Animation.gif
  • %Program Files%\DriverDoc\Extra\DOCSchedule.exe
  • %Program Files%\DriverDoc\Extra\DriverPro.exe
  • %Program Files%\DriverDoc\Extra\icon.png
  • %Program Files%\DriverDoc\Extra\SchedTasks.txt
  • %Program Files%\DriverDoc\Extra\Services1.txt
  • %Program Files%\DriverDoc\Extra\Services2.txt
  • %Program Files%\DriverDoc\Extra\SList.txt
  • %Program Files%\DriverDoc\Extra\sqlite3.dll

(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).. %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).. %Common Programs% is the folder that contains common program groups for all users, which is usually C:\Documents and Settings\All Users\Start Menu\Programs on Windows 2000, XP, and Server 2003, or C:\ProgramData\Microsoft\Windows\Start Menu\Programs on Windows Vista, 7, and 8.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop 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).)

It adds the following processes:

  • %User Temp%\is-{random}.tmp\{Malware Filename}.tmp /SL5="${random numbers},{Malware Path and name}.exe"
  • %System%\taskkill.exe /f /im "DriverDoc.exe"
  • %System%\taskkill.exe /f /im "DriverPro.exe"
  • %System%\taskkill.exe /f /im "DOCSchedule.exe"
  • %System%\taskkill.exe /f /im "DOCTray.exe"
  • %Program Files%\DriverDoc\DriverDoc.exe /INSTALL
  • %Program Files%\DriverDoc\DriverDoc.exe /INSTALLED
  • %Program Files%\DriverDoc\Extra\DriverPro.exe
  • %System%\schtasks.exe /Delete /TN "DriverDoc Schedule" /F
  • %System%\schtasks.exe /Delete /TN "DriverDoc Monitoring" /F

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

Other Details

This Potentially Unwanted Application adds the following registry keys:

HKEY_CURRENT_USER\Software\DriverDoc

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1

It connects to the following possibly malicious URL:

  • http://{BLOCKED}pc.{BLOCKED}est.com/check.php?partner=DriverDoc&type=driver&build=6.2.825
  • https://www.{BLOCKED}oft.com/en/driverdoc/install/

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.563.00

SSAPI PATTERN Date:

03 Nov 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

Delete this registry key

[ 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.

 
  • HKEY_CURRENT_USER\Software\DriverDoc
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DriverDoc_is1

Step 4

Search and delete this file

[ 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.
  • %User Temp%\is-{random}.tmp\{Malware Filename}.tmp
  • %User Temp%\is-{random}.tmp\setup.bmp
  • %Program Files%\DriverDoc\unins000.dat
  • %Program Files%\DriverDoc\Extra\is-{random}.tmp
  • %Program Files%\DriverDoc\is-{random}.tmp
  • %Common Programs%\DriverDoc\Help.lnk
  • %Desktop%\DriverDoc.lnk
  • %Common Programs%\DriverDoc\DriverDoc.lnk
  • %Common Programs%\DriverDoc\DriverDoc on the Web.url
  • %Common Programs%\DriverDoc\Uninstall DriverDoc.lnk
  • %Program Files%\DriverDoc\unins000.dat
  • %Application Data%\DriverDoc\program.log
  • %Program Files%\DriverDoc\77z.dll
  • %Program Files%\DriverDoc\7Brazilian.chm
  • %Program Files%\DriverDoc\7Brazilian.ini
  • %Program Files%\DriverDoc\7Danish.chm
  • %Program Files%\DriverDoc\7Danish.ini
  • %Program Files%\DriverDoc\7DriverDoc.exe
  • %Program Files%\DriverDoc\7Dutch.chm
  • %Program Files%\DriverDoc\7Dutch.ini
  • %Program Files%\DriverDoc\7English.chm
  • %Program Files%\DriverDoc\7English.ini
  • %Program Files%\DriverDoc\7Extra
  • %Program Files%\DriverDoc\7Finnish.chm
  • %Program Files%\DriverDoc\7Finnish.ini
  • %Program Files%\DriverDoc\7French.chm
  • %Program Files%\DriverDoc\7French.ini
  • %Program Files%\DriverDoc\7German.chm
  • %Program Files%\DriverDoc\7German.ini
  • %Program Files%\DriverDoc\7Italian.chm
  • %Program Files%\DriverDoc\7Italian.ini
  • %Program Files%\DriverDoc\7Japanese.chm
  • %Program Files%\DriverDoc\7Japanese.ini
  • %Program Files%\DriverDoc\7Norwegian.chm
  • %Program Files%\DriverDoc\7Norwegian.ini
  • %Program Files%\DriverDoc\7Polish.chm
  • %Program Files%\DriverDoc\7Polish.ini
  • %Program Files%\DriverDoc\7Portuguese.ch
  • %Program Files%\DriverDoc\7Portuguese.in
  • %Program Files%\DriverDoc\7Russian.chm
  • %Program Files%\DriverDoc\7Russian.ini
  • %Program Files%\DriverDoc\7Spanish.chm
  • %Program Files%\DriverDoc\7Spanish.ini
  • %Program Files%\DriverDoc\7sqlite3.dll
  • %Program Files%\DriverDoc\7Swedish.chm
  • %Program Files%\DriverDoc\7Swedish.ini
  • %Program Files%\DriverDoc\7unins000.dat
  • %Program Files%\DriverDoc\7unins000.exe
  • %Program Files%\DriverDoc\Extra\Brazilian.ini
  • %Program Files%\DriverDoc\Extra\Danish.ini
  • %Program Files%\DriverDoc\Extra\Dutch.ini
  • %Program Files%\DriverDoc\Extra\English.ini
  • %Program Files%\DriverDoc\Extra\Finnish.ini
  • %Program Files%\DriverDoc\Extra\French.ini
  • %Program Files%\DriverDoc\Extra\German.ini
  • %Program Files%\DriverDoc\Extra\Italian.ini
  • %Program Files%\DriverDoc\Extra\Japanese.ini
  • %Program Files%\DriverDoc\Extra\Norwegian.ini
  • %Program Files%\DriverDoc\Extra\Polish.ini
  • %Program Files%\DriverDoc\Extra\Portuguese.ini
  • %Program Files%\DriverDoc\Extra\Russian.ini
  • %Program Files%\DriverDoc\Extra\Settings.ini
  • %Program Files%\DriverDoc\Extra\Spanish.ini
  • %Program Files%\DriverDoc\Extra\Swedish.ini
  • %Program Files%\DriverDoc\Extra\Animation.gif
  • %Program Files%\DriverDoc\Extra\DOCSchedule.exe
  • %Program Files%\DriverDoc\Extra\DriverPro.exe
  • %Program Files%\DriverDoc\Extra\icon.png
  • %Program Files%\DriverDoc\Extra\SchedTasks.txt
  • %Program Files%\DriverDoc\Extra\Services1.txt
  • %Program Files%\DriverDoc\Extra\Services2.txt
  • %Program Files%\DriverDoc\Extra\SList.txt
  • %Program Files%\DriverDoc\Extra\sqlite3.dll

Step 5

Search and delete this folder

[ 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.
  • %Program Files%\DriverDoc
  • %User Temp%\is-{random}.tmp

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.Solvusoft.AB. 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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