WORM_ONLING.DJ
Worm:Win32/Taterf.B (Microsoft), PWS-Gamania.gen.a (McAfee), Trojan.Packed.NsAnti (Symantec), Worm.Win32.AutoRun (fs) (Sunbelt), Win32/PSW.OnLineGames.NMY trojan (Nod32)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm arrives by connecting affected removable drives to a system. It may be downloaded by other malware/grayware/spyware from remote sites.
It drops copies of itself in all removable and physical drives found in the system. It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
It accesses websites to download files. This action allows this malware to possibly add other malware on the affected computer.
TECHNICAL DETAILS
92,935 bytes
EXE
Yes
16 Jul 2009
Arrival Details
This worm arrives by connecting affected removable drives to a system.
It may be downloaded by other malware/grayware/spyware from remote sites.
Installation
This worm drops the following files:
- %System%\revo{number}.dll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It drops the following copies of itself into the affected system:
- %System%\revo.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
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
kmmsoft = "%System%\revo.exe"
Other System Modifications
This worm adds the following registry keys:
HKEY_CLASSES_ROOT\CLSID\MADOWN
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\Hidden\
SHOWALL
CheckedValue = "0"
(Note: The default value data of the said registry entry is 1.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = "2"
(Note: The default value data of the said registry entry is 1.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = "0"
(Note: The default value data of the said registry entry is 1.)
Propagation
This worm drops copies of itself in all removable and physical drives found in the system.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
;{random characters}
[AutoRun]
;{random characters}
open={malware File name}.{random extension name}
;{random characters}
shell\open\Command={malware file name}.{random extension name}
;{random characters}
shell\open\Default=1
;{random characters}
shell\explore\Command={malware file name}.{random extension name}
Download Routine
This worm accesses websites to download the following files:
- http://www.{BLOCKED}6.net/xrbv/uu1.rar
- http://{BLOCKED}b.com/xrbv/uu1.rar
SOLUTION
9.200
6.282.02
16 Jul 2009
6.283.00
17 Jul 2009
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
Scan your computer with your Trend Micro product and note files detected as WORM_ONLING.DJ
Step 3
Restart in Safe Mode
Step 4
Restore this modified 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\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
- From: CheckedValue = "0"
To: CheckedValue = "1"
- From: CheckedValue = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- From: Hidden = "2"
To: Hidden = "1"
- From: Hidden = "2"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- From: ShowSuperHidden = "0"
To: ShowSuperHidden = "1"
- From: ShowSuperHidden = "0"
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
- kmmsoft = "%System%\revo.exe"
- kmmsoft = "%System%\revo.exe"
Step 6
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_CLASSES_ROOT\CLSID
- MADOWN
- MADOWN
Step 7
Search and delete this file
- %System%\revo{number}.dll
Step 8
Search and delete AUTORUN.INF files created by WORM_ONLING.DJ that contain these strings
Step 9
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_ONLING.DJ. 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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