WORM_WBNA.BP
Trojan:Win32/Orsam!rts (Microsoft); Generic.grp!cw (McAfee); Downloader (Symantec); PAK:UPX, Worm.Win32.WBNA.baa (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Gen:Trojan.Heur.bmKfrLCcFrnif (FSecure)
Windows 2000, Windows, XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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.
TECHNICAL DETAILS
16,384 bytes
EXE
No
04 Nov 2011
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.
Autostart Technique
This worm registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
Other System Modifications
This worm adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\Description\
Microsoft\Rpc\UuidTemporaryData
HKEY_USERS\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}\TypeLib
HKEY_CLASSES_ROOT\CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}\InprocServer32
HKEY_CLASSES_ROOT\LiveID.Helper
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Description\
Microsoft\Rpc\UuidTemporaryData
NetworkAddress = {random values}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
ProgID = "LiveID.Helper"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
TypeLib = "{0369AF60-ECD7-460E-B015-8E5D17DB471B}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
VERSION = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
LiveID.Helper
Clsid = "{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
ProxyStubClsid = "{00020424-0000-0000-C000-000000000046}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
ProxyStubClsid32 = "{00020424-0000-0000-C000-000000000046}"
Dropping Routine
This worm drops the following files:
- %System%\livehelper.dll
- %User Temp%\VB2988829912838.tmp
(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.. %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.)
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
Close all opened browser windows
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\Software\Description\Microsoft\Rpc
- UuidTemporaryData
- In HKEY_USERS\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones
- 3
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
- Browser Helper Objects
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {0369AF60-ECD7-460E-B015-8E5D17DB471B}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{0369AF60-ECD7-460E-B015-8E5D17DB471B}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {6450F215-D4BB-4FBA-8B99-7519CB36F877}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
- TypeLib
- In HKEY_CLASSES_ROOT\CLSID
- {520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
- InprocServer32
- In HKEY_CLASSES_ROOT
- LiveID.Helper
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\Description\Microsoft\Rpc\UuidTemporaryData
- NetworkAddress={random values}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}\TypeLib
- Version="1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
- ProgID="LiveID.Helper"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}\InprocServer32
- ThreadingModel="Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
- TypeLib="{0369AF60-ECD7-460E-B015-8E5D17DB471B}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}
- VERSION="1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\LiveID.Helper
- Clsid="{520BCEBA-2E02-45C3-BA1B-38499F5D6B1C}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
- ProxyStubClsid="{00020424-0000-0000-C000-000000000046}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6450F215-D4BB-4FBA-8B99-7519CB36F877}
- ProxyStubClsid32="{00020424-0000-0000-C000-000000000046}"
Step 5
Search and delete these files
- %System%\livehelper.dll
- %User Temp%\VB2988829912838.tmp
Step 6
Scan your computer with your Trend Micro product to delete files detected as WORM_WBNA.BP. 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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