TROJ_FAKEAV.BAF
Windows 98, ME, NT, 2000, XP, Server 2003
Threat Type:
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan adds registry entries to enable its automatic execution at every system startup.
It connects to certain URLs. It may do this to remotely inform a malicious user of its installation. It may also do this to download possibly malicious files onto the computer, which puts the computer at a greater risk of infection by other threats. It accesses websites to download files. This action allows this malware to possibly add other malware on the affected computer.
TECHNICAL DETAILS
128548 bytes
Yes
17 Dec 2009
Installation
This Trojan drops the following files:
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Explorer\Browser Helper Objects\{D032570A-5F63-4812-A094-87D007C23012}\- %Start Menu%\Programs\SYSTEM SECURITY\SYSTEM SECURITY 2009.LNK
- %Start Menu%\Programs\SYSTEM SECURITY\SYSTEM SECURITY 2009 SUPPORT.LNK
- %User Temp%2956109.cmd
- %Desktop%\SYSTEM SECURITY 2009.LNK
(Note: %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
Other System Modifications
This Trojan adds the following registry keys:
Download Routine
This Trojan connects to the following malicious URLs:
HKEY_CLASSES_ROOT\CLSID\{D032570A-5F63-4812-A094-87D007C23012}
(Default)=
HKEY_CLASSES_ROOT\CLSID\{D032570A-5F63-4812-A094-87D007C23012}\InprocServer32
(Default)={malware path and filename}
HKEY_CLASSES_ROOT\CLSID\{D032570A-5F63-4812-A094-87D007C23012}\InprocServer32
ThreadingModel=Apartment
HKEY_CLASSES_ROOT0486ba1-ac77-4a17-bbae-96945b9473b1.TIEAdvBHO
(Default)=
HKEY_CLASSES_ROOT0486ba1-ac77-4a17-bbae-96945b9473b1.TIEAdvBHO\CLSID
(Default)={D032570A-5F63-4812-A094-87D007C23012}
HKEY_CLASSES_ROOT\CLSID\{D032570A-5F63-4812-A094-87D007C23012}\ProgID
(Default)=00486ba1-ac77-4a17-bbae-96945b9473b1.TIEAdvBHO
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Explorer\Browser Helper Objects\{D032570A-5F63-4812-A094-87D007C23012}
(Default)=- {BLOCKED}
- {BLOCKED}
- {BLOCKED}
It accesses websites to download the following files:
- C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA29498122949812.exe
- %User Temp%\sseFEFB.tmp
(Note: %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.)
SOLUTION
Step 1
Terminate the malware/grayware/spyware process:
Step 2
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.
- HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Run
- {90BF8224-CD63-4081-A4C7-EF9A2CF6596F}=
- HKEY_LOCAL_MACHINE\SOFTWARE2948812
- pc02948812ins=1
- HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Uninstall\SystemSecurity2009
- DisplayName=System Security 2009
- ShortcutPath=%Start Menu%\Programs\System Security\System Security 2009 Support.lnk
- UninstallString=%Start Menu%\Programs\System Security\System Security 2009 Support.lnk
- DisplayIcon=C:\Documents and Settings\All Users\Application Data29488122948812.exe,0
- HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Run2948812
- C:\Documents and Settings\All Users\Application Data29488122948812.exe=REG_SZ
Step 3
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.
- HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Installer\UserData\S-1-5-18\Products\904000001E872D116BF00006799C897E\Usage
- From: ProductNonBootFiles=3a8c002e
+ To: ProductNonBootFiles=36b2002d
- From: ProductNonBootFiles=3a8c002e
Step 4
Search and delete these files
- %Start Menu%\Programs\SYSTEM SECURITY\SYSTEM SECURITY 2009.LNK
- %Start Menu%\Programs\SYSTEM SECURITY\SYSTEM SECURITY 2009 SUPPORT.LNK
- %User Temp%2956109.cmd
- %Desktop%\SYSTEM SECURITY 2009.LNK
- C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA29498122949812.exe
- %User Temp%\sseFEFB.tmp
Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
Step 5
Scan your computer with your Trend Micro product to delete files detected as
TROJ_FAKEAV.BAF
*Note: 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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