ADW_REGSERVO
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Adware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This adware 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
3,940,512 bytes
EXE
No
21 May 2014
Arrival Details
This adware 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 adware creates the following folders:
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsv5.tmp
- %User Temp%\nscB.tmp
- %Program Files%\REGSERVO
- %System Root%\Documents and Settings\Wilbert
- %Start Menu%\Programs\REGSERVO
- %User Profile%\Application Data\REGSERVO
- %User Profile%\REGSERVO\LOGS
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %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, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
Other System Modifications
This adware deletes the following files:
- %User Temp%\nsk1.tmp
- %User Temp%\nsv5.tmp
- %User Temp%\nsn9.tmp
- %User Temp%\nscB.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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\App Paths\
REGSERVO.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
REGSERVO
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags\
Layers
HKEY_CLASSES_ROOT\ReS.Control
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Speech\Voices
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
AUTOUPDATES = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
puists = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
REGSERVO
DisplayName = "REGSERVO"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
REGSERVO
UninstallString = "%Program Files%\REGSERVO\uninst.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
REGSERVO
DisplayIcon = "%Program Files%\REGSERVO\REGSERVO.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
REGSERVO
DisplayVersion = "1.0.9.7"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
REGSERVO
URLInfoAbout = "http://www.REGSERVO.com"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
REGSERVO
Publisher = "Tuneup System Software Pvt Ltd."
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags\
Layers
%Program Files%\REGSERVO\REGSERVO.exe = "RUNASADMIN"
HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
Splash = "0"
HKEY_CURRENT_USER\Software\Microsoft\
Speech\Voices
DefaultTokenId = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\Voices\Tokens\MSSam"
HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
lastScan = "19-05-2014 08:48:25"
Dropping Routine
This adware drops the following files:
- %User Temp%\REGSERVOSetup_32.exe
- %User Temp%\REGSERVOSetup_64.exe
- %User Temp%\nsv5.tmp\GetVersion.dll
- %User Temp%\nscB.tmp\GetVersion.dll
- %User Temp%\nscB.tmp\modern-header.bmp
- %User Temp%\nscB.tmp\modern-wizard.bmp
- %User Temp%\nscB.tmp\nsDialogs.dll
- %User Temp%\nscB.tmp\System.dll
- %Program Files%\REGSERVO\RegSERVO.exe
- %Program Files%\REGSERVO\RegSERVOUpdater.exe
- %Program Files%\REGSERVO\RegSERVODll.dll
- %Program Files%\REGSERVO\3a_regservo.wav
- %Start Menu%\Programs\REGSERVO\REGSERVO.lnk
- %Desktop%\REGSERVO.lnk
- %Start Menu%\Programs\REGSERVO\Uninstall.lnk
- %Program Files%\REGSERVO\uninst.exe
- %Windows%\Tasks\REGSERVO.job
(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %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, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %Windows% is the Windows folder, which is usually C:\Windows.)
Other Details
This adware connects to the following possibly malicious URL:
- {BLOCKED}0.1
This report is generated via an automated analysis system.
SOLUTION
9.700
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
Delete this registry key
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
- REGSERVO
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\App Paths
- REGSERVO.exe
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
- REGSERVO
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags
- Layers
- In HKEY_CLASSES_ROOT
- ReS.Control
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech
- Voices
Step 3
Delete this registry value
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\REGSERVO
- AUTOUPDATES = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
- puists = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\REGSERVO
- DisplayName = "REGSERVO"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\REGSERVO
- UninstallString = "%Program Files%\REGSERVO\uninst.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\REGSERVO
- DisplayIcon = "%Program Files%\REGSERVO\REGSERVO.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\REGSERVO
- DisplayVersion = "1.0.9.7"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\REGSERVO
- URLInfoAbout = "http://www.REGSERVO.com"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\REGSERVO
- Publisher = "Tuneup System Software Pvt Ltd."
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
- %Program Files%\REGSERVO\REGSERVO.exe = "RUNASADMIN"
- In HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
- Splash = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Speech\Voices
- DefaultTokenId = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\Voices\Tokens\MSSam"
- In HKEY_LOCAL_MACHINE\SOFTWARE\REGSERVO
- lastScan = "19-05-2014 08:48:25"
Step 4
Search and delete these components
- %User Temp%\REGSERVOSetup_32.exe
- %User Temp%\REGSERVOSetup_64.exe
- %User Temp%\nsv5.tmp\GetVersion.dll
- %User Temp%\nscB.tmp\GetVersion.dll
- %User Temp%\nscB.tmp\modern-header.bmp
- %User Temp%\nscB.tmp\modern-wizard.bmp
- %User Temp%\nscB.tmp\nsDialogs.dll
- %User Temp%\nscB.tmp\System.dll
- %Program Files%\REGSERVO\RegSERVO.exe
- %Program Files%\REGSERVO\RegSERVOUpdater.exe
- %Program Files%\REGSERVO\RegSERVODll.dll
- %Program Files%\REGSERVO\3a_regservo.wav
- %Start Menu%\Programs\REGSERVO\REGSERVO.lnk
- %Desktop%\REGSERVO.lnk
- %Start Menu%\Programs\REGSERVO\Uninstall.lnk
- %Program Files%\REGSERVO\uninst.exe
- %Windows%\Tasks\REGSERVO.job
Step 5
Search and delete these folders
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsv5.tmp
- %User Temp%\nscB.tmp
- %Program Files%\REGSERVO
- %System Root%\Documents and Settings\Wilbert
- %Start Menu%\Programs\REGSERVO
- %User Profile%\Application Data\REGSERVO
- %User Profile%\REGSERVO\LOGS
Step 6
Scan your computer with your Trend Micro product to delete files detected as ADW_REGSERVO. 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 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.
- %User Temp%\nsk1.tmp
- %User Temp%\nsv5.tmp
- %User Temp%\nsn9.tmp
- %User Temp%\nscB.tmp
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