TROJ_SIREFEF.BTX
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
225,792 bytes
EXE
Yes
06 Dec 2013
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.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Google Update = "{random characters}"
It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\?etadpug
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug\Parameters
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug\Parameters
Parameters = "568"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug
Type = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug
ImagePath = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug
Description = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\?etadpug
DisplayName = "Google Update Service (gupdate)"
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\BITS\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\BITS\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\BITS
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\wuauserv\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\wuauserv\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\wuauserv\Enum
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\wuauserv
Dropping Routine
This Trojan drops the following files:
- GoogleUpdate.exe
- @
- 80000032.$
- %Program Files%\Google\Desktop\Install\{affbc62d-210e-e009-cc95-0decdee4c081}\ \ \???\{affbc62d-210e-e009-cc95-0decdee4c081}\L\00000004.@
(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).)
This report is generated via an automated analysis system.
SOLUTION
9.300
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
Restart in Safe Mode
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\SYSTEM\CurrentControlSet\Services
- ?etadpug
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- Parameters
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
- Google Update = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug\Parameters
- Parameters = "568"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- Type = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- ImagePath = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- Description = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\?etadpug
- DisplayName = "Google Update Service (gupdate)"
Step 5
Search and delete these components
- GoogleUpdate.exe
- @
- 80000032.$
- %Program Files%\Google\Desktop\Install\{affbc62d-210e-e009-cc95-0decdee4c081}\ \ \???\{affbc62d-210e-e009-cc95-0decdee4c081}\L\00000004.@
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_SIREFEF.BTX. 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.
Step 7
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BITS
- Parameters
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BITS
- Security
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services
- BITS
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\wuauserv
- Parameters
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\wuauserv
- Security
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\wuauserv
- Enum
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services
- wuauserv
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