WORM_LIGHTMOON.H
Worm.Win32.VB.cz (Kaspersky); W32.Rontokbro@mm (Norton); W32/MoonLight.worm (NAI)
Windows

Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Worm arrives via removable drives.
It drops copies of itself in removable drives. These dropped copies use the names of the folders located on the said drives for their file names.
TECHNICAL DETAILS
Arrival Details
This Worm arrives via removable drives.
Installation
This Worm adds the following folders:
- %User Profile%\Templates\O{random numbers}Z
- %Windows%\M{random numbers}
- %System%\X{random numbers}goa
(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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It drops the following copies of itself into the affected system:
- %Windows%\Ti{random numbers}ta.exe
- %Windows%\sa-{random numbers}.exe
- %Windows%\M{random numbers}\smss.exe
- %Windows%\M{random numbers}\systray.exe
- %Windows%\M{random numbers}\Ja{random numbers}bLay.com
- %User Profile%\Templates\O{random numbers}Z\service.exe
- %User Profile%\Templates\O{random numbers}Z\winlogon.exe
- %System%\{random numbers}I.exe
- %System%\X{random numbers}goa\Z{random numbers}cie.cmd
It drops the following files:
- %Windows%\[TheMoonlight].txt
- %Windows%\I'M in YOU.txt
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It drops copies of itself into folders whose names contain the following strings:
- upload
- download
- share
Autostart Technique
This Worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
T{random numbers}TT4 = "%System%\{random numbers}I.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
T{random numbers} = "%Windows%\sa-{random numbers}.exe"
It enables its automatic execution at every system startup by dropping the following copies of itself into the Windows Common Startup folder:
- %User Startup%\sql.cmd
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)
Other System Modifications
This Worm adds the following registry keys:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
untukmu2
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
untukmu2\version
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
titta
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
titta\version
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
noGods
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
noGods\appActive
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\
untukmu2\version
me = 2
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
titta\version
me = 1
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
noGods\appActive
service.exe = {data}
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
noGods\appActive
winlogon.exe = {data}
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
noGods\appActive
smss.exe = {data}
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
noGods\appActive
systray.exe = {data}
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"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
1 = "{random numbers}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
2 = "{random numbers}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
3 = "{random numbers}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
4 = "{random numbers}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
5 = "{random numbers}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
1 = "M{random numbers}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
2 = "O{random numbers}Z"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
3 = "X{random numbers}go"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableRegistryTools = 1
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = 0
(Note: The default value data of the said registry entry is {user setting}.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
HideFileExt = 1
(Note: The default value data of the said registry entry is {user setting}.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = 0
(Note: The default value data of the said registry entry is {user setting}.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
CabinetState
FullPath = 1
(Note: The default value data of the said registry entry is {user setting}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
User Shell Folders
Common Startup = "%System%\X{random numbers}goa"
(Note: The default value data of the said registry entry is "%All Users Profile%\Start Menu\Programs\Startup".)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Userinit = %System%\userinit.exe , "%WINDOWS%\M{random numbers}\Ja{random numbers}bLay.com"
(Note: The default value data of the said registry entry is "%System%\userinit.exe,".)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\SafeBoot
AlternateShell = "{random numbers}l.exe"
(Note: The default value data of the said registry entry is "cmd.exe".)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess
Start = 0
(Note: The default value data of the said registry entry is 2.)
Propagation
This Worm drops copies of itself in removable drives. These dropped copies use the names of the folders located on the said drives for their file names.
Other Details
This Worm connects to the following possibly malicious URL:
- http://www.{BLOCKED}ies.com/m00nL19ht2006/update.txt
It does the following:
- It drops copies of itself in removable drive using the names of the folders located on the said drives as filenames. It then hides the original folders to trick users on opening the files.
- It uses any of the following as filename for the dropped copies in the mentioned folders:
- Blink 182{multiple spaces}.exe
- Data DosenKu{multiple spaces}.exe
- Gallery{multiple spaces}.scr
- Lagu - Server{multiple spaces}.scr
- Love Song{multiple spaces}.scr
- New mp3 BaraT !!{multiple spaces}.exe
- Norman virus Control 5.18{multiple spaces}.exe
- RaHasIA{multiple spaces}.exe
- THe Best Ungu{multiple spaces}.scr
- Titip Folder Jangan DiHapus{multiple spaces}.exe
- TutoriaL HAcking{multiple spaces}.exe
- Windows Vista setup{multiple spaces}.scr
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
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
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\Microsoft\Windows\CurrentVersion\Run
- T{random numbers}TT4 = "%System%\{random numbers}I.exe"
- T{random numbers}TT4 = "%System%\{random numbers}I.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- T{random numbers} = "%Windows%\sa-{random numbers}.exe"
- T{random numbers} = "%Windows%\sa-{random numbers}.exe"
Step 5
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
- titta
- titta
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings
- untukmu2
- untukmu2
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- System
- System
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
- TUX
- TUX
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- msconfig.exe
- msconfig.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- regedit.exe
- regedit.exe
Step 6
Restore this modified registry value
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\Advanced
- From: Hidden = 0
To: Hidden = {user setting}
- From: Hidden = 0
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- From: HideFileExt = 1
To: HideFileExt = {user setting}
- From: HideFileExt = 1
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- From: ShowSuperHidden = 0
To: ShowSuperHidden = {user setting}
- From: ShowSuperHidden = 0
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\CabinetState
- From: FullPath = 1
To: FullPath = {user setting}
- From: FullPath = 1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
- From: Common Startup = "%System%\X{random numbers}goa"
To: Common Startup = "%All Users Profile%\Start Menu\Programs\Startup"
- From: Common Startup = "%System%\X{random numbers}goa"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
- From: Userinit = "%System%\userinit.exe , "%WINDOWS%\M{random numbers}\Ja{random numbers}bLay.com""
To: Userinit = "%System%\userinit.exe,"
- From: Userinit = "%System%\userinit.exe , "%WINDOWS%\M{random numbers}\Ja{random numbers}bLay.com""
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot
- From: AlternateShell = "{random numbers}l.exe"
To: AlternateShell = "cmd.exe"
- From: AlternateShell = "{random numbers}l.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess
- From: Start = 0
To: Start = 2
- From: Start = 0
Step 7
Search and delete these files
- %Windows%\[TheMoonlight].txt
- %Windows%\I'M in YOU.txt
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_LIGHTMOON.H. 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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