TROJ_WEBPREFI.CD
Windows 2000, Windows XP, Windows Server 2003
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 modifies files, disabling programs and applications from properly running.
It deletes itself after execution.
TECHNICAL DETAILS
487,457 bytes
EXE
Yes
11 Jun 2012
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.
Installation
This Trojan creates the following folders:
- %System Root%\ProgramData\Microsoft
- %System Root%\ProgramData\Microsoft\Windows
- D:\RECYCLER
- %System Root%\RECYCLER
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Autostart Technique
This Trojan registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\
sErvices\SessionLog
HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\
sErvices\SystemServ
HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\
sErvices\SystemUpdate
HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\
sErvices\WNetService
HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\
sErvices\WNetLog0n
HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\
sErvices\WinLog0n
Other System Modifications
This Trojan modifies the following files:
- %User Profile%\Application Data\Microsoft
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It deletes the following files:
- %System Root%\RECYCLER\game.xls
- %System Root%\ProgramData\Microsoft\Windows\Sessionemt.dll
- %System Root%\ProgramData\Microsoft\Windows\Intelczu.dll
- %System Root%\ProgramData\Microsoft\Windows\Svcxca.dll
- %System Root%\ProgramData\Microsoft\Windows\Audiosxo.dll
- %System Root%\ProgramData\Microsoft\Windows\Secsmp.dll
- %System Root%\ProgramData\Microsoft\Windows\Sysehv.dll
- %System Root%\ProgramData\Microsoft\Windows\NetCC70.ini
- jpg
- txt
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog\Parameter
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ\Parameter
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate\Parameter
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService\Parameter
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n\Parameter
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n\Parameter
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog\Parameter
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Cmd
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
CCmd
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
ExeCmd
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\cfeba
netsvcs = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog
DisplayName = "SessionLog"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog
Type = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog
ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog
Description = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SessionLog\Parameter
ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Sessionemt.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
SessionLog = "idle"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
SessionLog = "%System Root%\ProgramData\Microsoft\Windows\Sessionemt.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\aptll
netsvcs = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ
DisplayName = "SystemServ"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ
Type = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ
ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ
Description = "Creates a network connections."
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemServ\Parameter
ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Intelczu.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
SystemServ = "idle"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
SystemServ = "%System Root%\ProgramData\Microsoft\Windows\Intelczu.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\ugwdg
netsvcs = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate
DisplayName = "SystemUpdate"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate
Type = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate
ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate
Description = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SystemUpdate\Parameter
ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Svcxca.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
SystemUpdate = "idle"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
SystemUpdate = "%System Root%\ProgramData\Microsoft\Windows\Svcxca.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\pbczs
netsvcs = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService
DisplayName = "WNetService"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService
Type = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService
ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService
Description = "Manage the RPC name service database."
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetService\Parameter
ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Audiosxo.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
WNetService = "idle"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
WNetService = "%System Root%\ProgramData\Microsoft\Windows\Audiosxo.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\htopl
netsvcs = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n
DisplayName = "WNetLog0n"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n
Type = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n
ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n
Description = "Provide software installation services such as Assign, Publish, and Remove."
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WNetLog0n\Parameter
ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Secsmp.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
WNetLog0n = "idle"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
WNetLog0n = "%System Root%\ProgramData\Microsoft\Windows\Secsmp.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\zjxxb
netsvcs = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n
DisplayName = "WinLog0n"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n
Type = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n
ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n
Description = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog0n\Parameter
ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Sysehv.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
WinLog0n = "idle"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
WinLog0n = "%System Root%\ProgramData\Microsoft\Windows\Sysehv.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\uedsn
netsvcs = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog
DisplayName = "WinLog"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog
Type = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog
ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog
Description = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinLog\Parameter
ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\NetBin27.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc
WinLog = "header"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Svc\Path
WinLog = "%System Root%\ProgramData\Microsoft\Windows\NetBin27.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Security\
Cmd
Verdec = "RAR_v1"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\321c041cc0b645556121c95e23b6f3e9.zip
- %System Root%\ProgramData\Microsoft\Windows\NetBin27.dll
- %User Temp%\658dfc71714dc5d62bd60adc8b7cd54e.zip
- %User Profile%\Microsoft\Crypto
- %User Profile%\Crypto\RSA
- %User Profile%\RSA\S-1-5-18
- %System Root%\ProgramData\Microsoft\Windows\NetCC131.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC203.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC344.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC171.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC283.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC345.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC326.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC112.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC324.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC160.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC149.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC0.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC47.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC295.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC225.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC253.html
- \notepad.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, XP, and Server 2003.. %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:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}u.com/gqpgemcuwd
- http://{BLOCKED}u.com/iwaxsxg
- http://{BLOCKED}u.com/ocoijxnwkg
- http://{BLOCKED}u.com/bwhrpbe
- http://{BLOCKED}u.com/heiwqiu
- http://{BLOCKED}e.com/gqpgemcuwd
- http://{BLOCKED}e.com/iwaxsxg
- http://{BLOCKED}e.com/ocoijxnwkg
- http://{BLOCKED}e.com/bwhrpbe
- http://{BLOCKED}e.com/heiwqiu
- http://hi.{BLOCKED}u.com/gqpgemcuwd/blog
- http://hi.{BLOCKED}u.com/iwaxsxg/blog
- http://hi.{BLOCKED}u.com/ocoijxnwkg/blog
- http://hi.{BLOCKED}u.com/bwhrpbe/blog
- http://hi.{BLOCKED}u.com/heiwqiu/blog
- http://{BLOCKED}logr.com/user/gqpgemcuwd
It deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restart in Safe Mode
Step 3
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\SysTEM\cURrentcontrolsEt\sErvices
- SessionLog
- In HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\sErvices
- SystemServ
- In HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\sErvices
- SystemUpdate
- In HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\sErvices
- WNetService
- In HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\sErvices
- WNetLog0n
- In HKEY_LOCAL_MACHINE\SysTEM\cURrentcontrolsEt\sErvices
- WinLog0n
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- Parameter
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security
- Svc
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- Path
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- Parameter
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- Parameter
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- Parameter
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- Parameter
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- Parameter
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- Parameter
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security
- Cmd
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security
- CCmd
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security
- ExeCmd
Step 4
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\Microsoft\Windows NT\CurrentVersion\cfeba
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- DisplayName = "SessionLog"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- Type = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog
- Description = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SessionLog\Parameter
- ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Sessionemt.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- SessionLog = "idle"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc\Path
- SessionLog = "%System Root%\ProgramData\Microsoft\Windows\Sessionemt.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\aptll
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- DisplayName = "SystemServ"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- Type = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ
- Description = "Creates a network connections."
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemServ\Parameter
- ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Intelczu.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- SystemServ = "idle"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc\Path
- SystemServ = "%System Root%\ProgramData\Microsoft\Windows\Intelczu.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ugwdg
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- DisplayName = "SystemUpdate"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- Type = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate
- Description = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SystemUpdate\Parameter
- ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Svcxca.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- SystemUpdate = "idle"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc\Path
- SystemUpdate = "%System Root%\ProgramData\Microsoft\Windows\Svcxca.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\pbczs
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- DisplayName = "WNetService"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- Type = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService
- Description = "Manage the RPC name service database."
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetService\Parameter
- ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Audiosxo.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- WNetService = "idle"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc\Path
- WNetService = "%System Root%\ProgramData\Microsoft\Windows\Audiosxo.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\htopl
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- DisplayName = "WNetLog0n"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- Type = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n
- Description = "Provide software installation services such as Assign, Publish, and Remove."
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WNetLog0n\Parameter
- ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Secsmp.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- WNetLog0n = "idle"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc\Path
- WNetLog0n = "%System Root%\ProgramData\Microsoft\Windows\Secsmp.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\zjxxb
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- DisplayName = "WinLog0n"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- Type = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n
- Description = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog0n\Parameter
- ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\Sysehv.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- WinLog0n = "idle"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc\Path
- WinLog0n = "%System Root%\ProgramData\Microsoft\Windows\Sysehv.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\uedsn
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- DisplayName = "WinLog"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- Type = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- ImagePath = "%SystemRoot%\system32\svchost.exe -k netsvcs"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog
- Description = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinLog\Parameter
- ServiceDll = "%System Root%\ProgramData\Microsoft\Windows\NetBin27.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc
- WinLog = "header"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Svc\Path
- WinLog = "%System Root%\ProgramData\Microsoft\Windows\NetBin27.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Security\Cmd
- Verdec = "RAR_v1"
Step 5
Search and delete these files
- %User Temp%\321c041cc0b645556121c95e23b6f3e9.zip
- %System Root%\ProgramData\Microsoft\Windows\NetBin27.dll
- %User Temp%\658dfc71714dc5d62bd60adc8b7cd54e.zip
- %User Profile%\Microsoft\Crypto
- %User Profile%\Crypto\RSA
- %User Profile%\RSA\S-1-5-18
- %System Root%\ProgramData\Microsoft\Windows\NetCC131.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC203.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC344.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC171.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC283.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC345.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC326.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC112.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC324.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC160.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC149.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC0.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC47.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC295.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC225.html
- %System Root%\ProgramData\Microsoft\Windows\NetCC253.html
- \notepad.exe
Step 6
Search and delete these folders
- %System Root%\ProgramData\Microsoft
- %System Root%\ProgramData\Microsoft\Windows
- D:\RECYCLER
- %System Root%\RECYCLER
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_WEBPREFI.CD. 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.
- %User Profile%\Application Data\Microsoft
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.
- %System Root%\RECYCLER\game.xls
- %System Root%\ProgramData\Microsoft\Windows\Sessionemt.dll
- %System Root%\ProgramData\Microsoft\Windows\Intelczu.dll
- %System Root%\ProgramData\Microsoft\Windows\Svcxca.dll
- %System Root%\ProgramData\Microsoft\Windows\Audiosxo.dll
- %System Root%\ProgramData\Microsoft\Windows\Secsmp.dll
- %System Root%\ProgramData\Microsoft\Windows\Sysehv.dll
- %System Root%\ProgramData\Microsoft\Windows\NetCC70.ini
- jpg
- txt
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