TROJ_KILLAV.CEG
TrojanDownloader:Win32/Small.gen!AO (Microsoft); Trojan.Gen (Symantec); Trojan-Downloader.Win32.Geral.aipm (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Backdoor.Generic.638132 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan 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
Arrival Details
This Trojan 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 Trojan drops the following copies of itself into the affected system:
- %Program Files%\Common Files\realteck\feoidq.pif
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
It creates the following folders:
- %Program Files%\Common Files\realteck
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804
Ime File = "30906.LOG"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804
Layout Text = "chinese(simple)"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Keyboard Layouts\E0200804
Layout File = "kbdus.dll"
It modifies the following registry entries:
HKEY_CURRENT_USER\Keyboard Layout\Preload
2 = "E0200804"
(Note: The default value data of the said registry entry is e00e0804.)
HKEY_CURRENT_USER\Keyboard Layout\Preload
1 = "E0200804"
(Note: The default value data of the said registry entry is 00000409.)
Dropping Routine
This Trojan drops the following files:
- %System%\30906.LOG
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
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
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\SYSTEM\ControlSet001\Control\Keyboard Layouts
- E0200804
Step 3
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\SYSTEM\ControlSet001\Control\Keyboard Layouts\E0200804
- Ime File="30906.LOG"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts\E0200804
- Layout Text="chinese(simple)"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts\E0200804
- Layout File="kbdus.dll"
Step 4
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_CURRENT_USER\Keyboard Layout\Preload
- From: 2="E0200804"
To: 2=e00e0804
- From: 2="E0200804"
- In HKEY_CURRENT_USER\Keyboard Layout\Preload
- From: 1="E0200804"
To: 1=00000409
- From: 1="E0200804"
Step 5
Search and delete this folder
Step 6
Search and delete this file
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_KILLAV.CEG. 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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