Analysis by: Jeanne Jocson
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It does not have any backdoor routine.

This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size: 3,470,120 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 11 Mar 2016

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
solvusoftddDReminder = "%Program Files%\DriverDoc\Solvusoftdd.exe -rem"

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
visparam = "cc8b109e585184593e5fcd87103c1d20"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
utm_source = "driverdoc"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
utm_campaign = "2.25"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
utm_medium = "software"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
BuyNowURL = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
RenewNowURL = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
SupportURL = "https://support.{BLOCKED}oft.com/home/?"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
StartAutoScanPMUI = "1"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
StartAutoScanOnLaunch = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
StartAutoTutorial = "1"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
TrialType = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd
MachineID = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd
MachineID = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
MaxFixLimit = "32"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
Inno Setup: Setup Version = "5.5.2 (u)"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
Inno Setup: App Path = "%Program Files%\DriverDoc"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
InstallLocation = "%Program Files%\DriverDoc"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
Inno Setup: Icon Group = "DriverDoc"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
Inno Setup: User = "Wilbert"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
Inno Setup: Language = "en"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
DisplayName = "DriverDoc"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
DisplayIcon = "%Program Files%\DriverDoc\Solvusoftdd.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
UninstallString = "%Program Files%\DriverDoc\unins000.exe "

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
QuietUninstallString = "%Program Files%\DriverDoc\unins000.exe /SILENT"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
DisplayVersion = "2.25.1086.16624"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
Publisher = "Solvusoft Corporation"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
InstallDate = "20160310"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
MajorVersion = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
MinorVersion = "19"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
InstalledPath = "%Program Files%\DriverDoc"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
InstalledPath = "%Program Files%\DriverDoc"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc\LANG
LangCode = "en"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc\LANG
LangID = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc\LANG
LangID = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
DriverDoc_is1
UninstallString = "%Program Files%\DriverDoc\unins000.exe /silent"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
AppVersion = "2.25.1086.16624"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
bShowCongratsAfterUpdateRestart = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
Expired = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
Download Path = "%User Profile%\DriverDoc\Download"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
Backup Path = "%User Profile%\DriverDoc\Backup"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
FirstRun = "1"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
StartAutoScanPMUI = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
Solvusoftdd\DriverDoc
RawId = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
Solvusoftdd\DriverDoc
RawId = "{random values}"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Program Files%\DriverDoc\Solvusoftdd.exe = "{random characters}"

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Dropping Routine

This Trojan drops the following files:

  • %Application Data%\Solvusoft\Solvusoftdd\DriverDoc\vis.ini
  • %Program Files%\DriverDoc\Chinese_rcp.ini
  • %Program Files%\DriverDoc\Danish_rcp.ini
  • %Program Files%\DriverDoc\difxapi.dll
  • %Program Files%\DriverDoc\difxapi64.dll
  • %Program Files%\DriverDoc\Dutch_rcp.ini
  • %Program Files%\DriverDoc\eng_rcp.ini
  • %Program Files%\DriverDoc\Finnish_rcp_fi.ini
  • %Program Files%\DriverDoc\French_rcp.ini
  • %Program Files%\DriverDoc\German_rcp.ini
  • %Program Files%\DriverDoc\install_left_image.bmp
  • %Program Files%\DriverDoc\isxdl.dll
  • %Program Files%\DriverDoc\Italian_rcp.ini
  • %Program Files%\DriverDoc\Japanese_rcp.ini
  • %Program Files%\DriverDoc\Norwegian_rcp.ini
  • %Program Files%\DriverDoc\Portuguese_rcp.ini
  • %Program Files%\DriverDoc\russian_rcp_ru.ini
  • %Program Files%\DriverDoc\Solvusoftdd.exe
  • %Program Files%\DriverDoc\Spanish_rcp.ini
  • %Program Files%\DriverDoc\Swedish_rcp.ini
  • %Program Files%\DriverDoc\unins000.dat
  • %Program Files%\DriverDoc\unins000.exe
  • %Program Files%\DriverDoc\unins000.msg
  • %Program Files%\DriverDoc\unrar.dl
  • %Program Files%\DriverDoc\updater\amd64Helper\difxapi.dll
  • %Program Files%\DriverDoc\updater\amd64Helper\DriverUpdateHelper64.exe
  • %Program Files%\DriverDoc\updater\amd64Helper\DriverUpdateHelper64.manifest
  • %Program Files%\DriverDoc\updater\extract\7z.dll
  • %Program Files%\DriverDoc\updater\extract\7z.exe
  • %Program Files%\DriverDoc\updater\extract\copying.txt
  • %Program Files%\DriverDoc\updater\extract\History.txt
  • %Program Files%\DriverDoc\updater\extract\license.txt
  • %Program Files%\DriverDoc\updater\extract\readme.txt
  • %User Temp%\is-odldh.tmp\{malware file name}.tmp-deleted afterwards
  • %User Temp%\is-NLLOR.tmp\_isetup\_shfoldr.dll-deleted afterwards

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other Details

This is the Trend Micro detection for:

  • Installer of DriverDoc

NOTES:

It displays the following user interface while scanning your system:

After scanning, it will display bogus and exaggerated notifications to the user that the system's drivers are not updated.

When the user clicks the Update all button, it will tell the user to purchase the full version of DriverDoc to update all the drivers.

  SOLUTION

Minimum Scan Engine: 9.8

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

Restart in Safe Mode

[ Learn More ]

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\Run
    • solvusoftddDReminder = "%Program Files%\DriverDoc\Solvusoftdd.exe -rem"

Step 5

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.

  • In HKEY_LOCAL_MACHINE\Software\Solvusoft\Solvusoftdd
    • DriverDoc
  • In HKEY_CURRENT_USER\Software\Solvusoft\Solvusoftdd
    • DriverDoc
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • DriverDoc_is1
  • In HKEY_CURRENT_USER\Software\Solvusoft\Solvusoftdd\DriverDoc
    • LANG
  • In HKEY_LOCAL_MACHINE\Software\Solvusoft\Solvusoftdd\DriverDoc
    • LANG

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.
  • %Application Data%\Solvusoft
  • %Program Files%\DriverDoc
  • %Start Menu%\Programs\DriverDoc

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as PUA_DRIVERDOC.GA. 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

Scan your computer with your Trend Micro product to delete files detected as PUA_DRIVERDOC.GA. 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.


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