TROJ_NOTOOLS
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 disables Task Manager, Registry Editor, and Folder Options.
TECHNICAL DETAILS
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 drops the following copies of itself into the affected system:
- %User Profile%\O30413Z\service.exe
(Note: %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.)
It creates the following folders:
- %Windows%\M02505
- %User Profile%\Templates\O30413Z
- %System%\X27001go
(Note: %Windows% is the Windows folder, which is usually C:\Windows.. %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.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
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
T1025854TT4 = "%System%\784054534852l.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
T13Z840 = "%Windows%\sa-422854.exe"
It modifies the following registry entries to ensure it automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "explorer.exe, %User Profile%\O30413Z\TuxO30413Z.exe"
(Note: The default value data of the said registry entry is Explorer.exe.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Userinit = "%System%\userinit.exe , %Windows%\M02505\Ja845720bLay.com"
(Note: The default value data of the said registry entry is %Windows%\system32\userinit.exe,.)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
untukmu\version
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
msconfig.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
regedit.exe
It adds the following registry entries:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
untukmu\version
me = "4"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
1 = "M02505"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
2 = "O30413Z"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
3 = "X27001go"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
1 = "bf6b6"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
2 = "673c6"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
3 = "82944"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
4 = "ce798"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
5 = "228"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
msconfig.exe
debugger = "%Windows%\notepad.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
regedit.exe
debugger = "%Windows%\notepad.exe"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess
Start = "0"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
User Shell Folders
Common Startup = "%System%\X27001go"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\SuperHidden
UncheckedValue = "0"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\SafeBoot
AlternateShell = "784054534852l.exe"
(Note: The default value data of the said registry entry is cmd.exe.)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\
Control\SafeBoot
AlternateShell = "784054534852l.exe"
(Note: The default value data of the said registry entry is cmd.exe.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
CabinetState
FullPath = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
HideFileExt = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = "0"
(Note: The default value data of the said registry entry is 2.)
It creates the following registry entry(ies) to disable Task Manager, Registry Tools and Folder Options:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableRegistryTools = "1"
Dropping Routine
This Trojan drops the following files:
- \msvbvm60.dll
- %System%\msvbvm60.dll
- %User Profile%\O30413Z\winlogon.exe
- %Windows%\M02505\EmangEloh.exe
- %Windows%\M02505\smss.exe
- %System%\X27001go\Z784054cie.cmd
- %Windows%\sa-422854.exe
- %Windows%\Ti534852ta.exe
- %Windows%\M02505\Ja845720bLay.com
- %System%\784054534852l.exe
- %User Startup%\sql.cmd
- %User Profile%\O30413Z\TuxO30413Z.exe
This report is generated via an automated analysis system.
SOLUTION
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
Identify and delete files detected as TROJ_NOTOOLS using either the Startup Disk or Recovery Console
Step 3
Enable Registry Editor, Task Manager, and Folder options
Step 4
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_CURRENT_USER\Software\VB and VBA Program Settings\untukmu
- version
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX
- Path
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX
- biang
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- System
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- msconfig.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- regedit.exe
Step 5
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- T1025854TT4 = "%System%\784054534852l.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- T13Z840 = "%Windows%\sa-422854.exe"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\untukmu\version
- me = "4"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\Path
- 1 = "M02505"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\Path
- 2 = "O30413Z"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\Path
- 3 = "X27001go"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
- 1 = "bf6b6"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
- 2 = "673c6"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
- 3 = "82944"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
- 4 = "ce798"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
- 5 = "228"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- ShowSuperHidden = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe
- debugger = "%Windows%\notepad.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe
- debugger = "%Windows%\notepad.exe"
Step 6
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\CabinetState
- FullPath = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- From: HideFileExt = "1"
To: HideFileExt = ""1""
- From: HideFileExt = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- From: Hidden = "0"
To: Hidden = ""2""
- From: Hidden = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess
- From: Start = "0"
To: Start = ""2""
- From: Start = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
- From: Common Startup = "%System%\X27001go"
To: Common Startup = ""{random values}""
- From: Common Startup = "%System%\X27001go"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden
- From: UncheckedValue = "0"
To: UncheckedValue = ""1""
- From: UncheckedValue = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\SafeBoot
- From: AlternateShell = "784054534852l.exe"
To: AlternateShell = ""cmd.exe""
- From: AlternateShell = "784054534852l.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\SafeBoot
- From: AlternateShell = "784054534852l.exe"
To: AlternateShell = ""cmd.exe""
- From: AlternateShell = "784054534852l.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
- From: Shell = "explorer.exe, %User Profile%\O30413Z\TuxO30413Z.exe"
To: Shell = ""Explorer.exe""
- From: Shell = "explorer.exe, %User Profile%\O30413Z\TuxO30413Z.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
- From: Userinit = "%System%\userinit.exe , %Windows%\M02505\Ja845720bLay.com"
To: Userinit = ""%Windows%\system32\userinit.exe,""
- From: Userinit = "%System%\userinit.exe , %Windows%\M02505\Ja845720bLay.com"
Step 7
Search and delete these components
- \msvbvm60.dll
- %System%\msvbvm60.dll
- %User Profile%\O30413Z\winlogon.exe
- %Windows%\M02505\EmangEloh.exe
- %Windows%\M02505\smss.exe
- %System%\X27001go\Z784054cie.cmd
- %Windows%\sa-422854.exe
- %Windows%\Ti534852ta.exe
- %Windows%\M02505\Ja845720bLay.com
- %System%\784054534852l.exe
- %User Startup%\sql.cmd
- %User Profile%\O30413Z\TuxO30413Z.exe
Step 8
Search and delete these folders
- %Windows%\M02505
- %User Profile%\Templates\O30413Z
- %System%\X27001go
Step 9
Scan your computer with your Trend Micro product to delete files detected as TROJ_NOTOOLS. 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.
Did this description help? Tell us how we did.