WORM_AUTORUN.MMS
Worm:Win32/Autorun.JQ (Microsoft); W32/Autorun.worm.ch (McAfee); W32.SillyFDC (Symantec); Worm.Win32.VB.pj (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Trojan horse Generic10.LDL (AVG)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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 worm 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 worm creates the following folders:
- %System%\dllcache\Recycler.{645FF040-5081-101B-9F08-00AA002F954E}
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other System Modifications
This worm adds the following registry keys:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
trial version\trial
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
ctfmon.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
taskmgr.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
boot.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
autorun.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
autoruns.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
auto.exe
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\
procexp.exe
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System\
Scripts\Logoff\0
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System\
Scripts\Logoff\0\
0
HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows\System\
Scripts\Shutdown\0
HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows\System\
Scripts\Shutdown\0\
0
HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows\System\
Scripts\Startup\0
HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows\System\
Scripts\Startup\0\
0
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\DisallowRun
It adds the following registry entries:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
trial version\trial
date1 = "5/13/2013"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
ctfmon.exe
Debugger = "%Windows%\Fonts\Fonts.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
taskmgr.exe
Debugger = "%Windows%\Fonts\tskmgr.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
boot.exe
Debugger = "%Windows%\Fonts\fonts.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
autorun.exe
Debugger = "%System%\drivers\drivers.cab.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
autoruns.exe
Debugger = "%System%\drivers\drivers.cab.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
auto.exe
Debugger = "%System%\drivers\drivers.cab.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
msconfig.exe
Debugger = "%Windows%\Media\rndll32.pif"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
procexp.exe
Debugger = "%Windows%\pchealth\helpctr\binaries\HelpHost.com"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
sys = "%Windows%\Fonts\Fonts.exe"
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System\
Scripts\Logoff\0
DisplayName = "Local Group Policy"
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System\
Scripts\Logoff\0
GPO-ID = "LocalGPO"
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System\
Scripts\Logoff\0
GPOName = "Local Group Policy"
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System\
Scripts\Logoff\0
SOM-ID = "Local"
HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System\
Scripts\Logoff\0\
0
Script = "%Windows%\Cursors\Boom.vbs"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Shutdown\0
DisplayName = "Local Group Policy"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Shutdown\0
GPO-ID = "LocalGPO"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Shutdown\0
GPOName = "Local Group Policy"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Shutdown\0
SOM-ID = "Local"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Shutdown\0\
0
Script = "%Windows%\Cursors\Boom.vbs"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Startup\0
DisplayName = "Local Group Policy"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Startup\0
GPO-ID = "LocalGPO"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Startup\0
GPOName = "Local Group Policy"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Startup\0
SOM-ID = "Local"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\System\
Scripts\Startup\0\
0
Script = "%Windows%\Boom.vbs"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
exefile
NeverShowExt = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
comfile
NeverShowExt = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
DisableStatusMessages = "1"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\SuperHidden
ValueName = "ShowSuperHiden"
(Note: The default value data of the said registry entry is ShowSuperHidden.)
HKEY_CURRENT_USER\Control Panel\Desktop
SCRNSAVE.EXE = "%Windows%\pchealth\helpctr\binaries\HelpHost.com"
(Note: The default value data of the said registry entry is %Windows%\system32\logon.scr.)
HKEY_CURRENT_USER\Control Panel\Desktop
ScreenSaveTimeOut = "30"
(Note: The default value data of the said registry entry is 600.)
HKEY_CURRENT_USER\Control Panel\Desktop
AutoEndTasks = "1"
(Note: The default value data of the said registry entry is 0.)
It creates the following registry entry(ies) to disable Task Manager, Registry Tools and Folder Options:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\DisallowRun
36 = "Autostart program.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\DisallowRun
37 = "Process Explorer.exe"
Dropping Routine
This worm drops the following files:
- %System%\dllcache\autorun.inf
- %Windows%\Cursors\Boom.vbs
- %System%\dllcache\tskmgr.exe
- %Windows%\Fonts\wav.wav
- %Windows%\Boom.vbs
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %Windows% is the Windows folder, which is usually C:\Windows.)
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
Enable Registry Editor, Task Manager, and Folder options
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_CURRENT_USER\Software\VB and VBA Program Settings version
- trial
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- ctfmon.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- taskmgr.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- boot.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- autorun.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- autoruns.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- auto.exe
- 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
- procexp.exe
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion
- RunOnce
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer
- Run
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\Scripts\Logoff
- 0
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\Scripts\Logoff
- 0
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown
- 0
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System\Scripts\Shutdown
- 0
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System\Scripts\Startup
- 0
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System\Scripts\Startup
- 0
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
- DisallowRun
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_CURRENT_USER\Software\VB and VBA Program Settings\trial version\trial
- date1 = "5/13/2013"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ctfmon.exe
- Debugger = "%Windows%\Fonts\Fonts.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe
- Debugger = "%Windows%\Fonts\tskmgr.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\boot.exe
- Debugger = "%Windows%\Fonts\fonts.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\autorun.exe
- Debugger = "%System%\drivers\drivers.cab.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\autoruns.exe
- Debugger = "%System%\drivers\drivers.cab.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\auto.exe
- Debugger = "%System%\drivers\drivers.cab.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe
- Debugger = "%Windows%\Media\rndll32.pif"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\procexp.exe
- Debugger = "%Windows%\pchealth\helpctr\binaries\HelpHost.com"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
- sys = "%Windows%\Fonts\Fonts.exe"
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0
- DisplayName = "Local Group Policy"
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0
- GPO-ID = "LocalGPO"
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0
- GPOName = "Local Group Policy"
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0
- SOM-ID = "Local"
- In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\Scripts\Logoff\0\0
- Script = "%Windows%\Cursors\Boom.vbs"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Shutdown\0
- DisplayName = "Local Group Policy"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Shutdown\0
- GPO-ID = "LocalGPO"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Shutdown\0
- GPOName = "Local Group Policy"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Shutdown\0
- SOM-ID = "Local"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Shutdown\0\0
- Script = "%Windows%\Cursors\Boom.vbs"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Startup\0
- DisplayName = "Local Group Policy"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Startup\0
- GPO-ID = "LocalGPO"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Startup\0
- GPOName = "Local Group Policy"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Startup\0
- SOM-ID = "Local"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\Scripts\Startup\0\0
- Script = "%Windows%\Boom.vbs"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\exefile
- NeverShowExt = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\comfile
- NeverShowExt = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
- DisableStatusMessages = "1"
Step 5
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden
- From: ValueName = "ShowSuperHiden"
To: ValueName = ""ShowSuperHidden""
- From: ValueName = "ShowSuperHiden"
- In HKEY_CURRENT_USER\Control Panel\Desktop
- From: SCRNSAVE.EXE = "%Windows%\pchealth\helpctr\binaries\HelpHost.com"
To: SCRNSAVE.EXE = ""%Windows%\system32\logon.scr""
- From: SCRNSAVE.EXE = "%Windows%\pchealth\helpctr\binaries\HelpHost.com"
- In HKEY_CURRENT_USER\Control Panel\Desktop
- From: ScreenSaveTimeOut = "30"
To: ScreenSaveTimeOut = ""600""
- From: ScreenSaveTimeOut = "30"
- In HKEY_CURRENT_USER\Control Panel\Desktop
- From: AutoEndTasks = "1"
To: AutoEndTasks = ""0""
- From: AutoEndTasks = "1"
Step 6
Search and delete these components
- %System%\dllcache\autorun.inf
- %Windows%\Cursors\Boom.vbs
- %System%\dllcache\tskmgr.exe
- %Windows%\Fonts\wav.wav
- %Windows%\Boom.vbs
Step 7
Search and delete this folder
- %System%\dllcache\Recycler.{645FF040-5081-101B-9F08-00AA002F954E}
Step 8
Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.MMS. 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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