TROJ_PHIRES.A
Trojan:Win32/Startpage.KR(Microsoft),Trojan.Startpage(Norton),Trojan.Win32.Generic!BT(Sunbelt),W32/StartPage.CC!tr.dldr(Fortinet)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
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 adds the following folders:
- %Program Files%\Common Files\TaoBao
(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 drops the following files:
- %User Temp%\$$dmsf.bat
- %Program Files%\Common Files\TaoBao\{Random File Name}.ico
- %Program Files%\Common Files\TaoBao\{Random File Name2}.ico
- %Program Files%\Internet Explorer\SIGNUP\wwwwwww.exe
- %Windows%\RkRealTech.exe
- %Windows%\RtkSYUdp.exe
- %Application Data%\Microsoft\Internet Explorer\Quick Launch\wwwwwww.1nk
It drops the following component file(s):
- %System%\kbd101b.dll
- %System%\kbd101c.dll
- %System%\kbd103.dll
- %System%\kbd106.dll
- %System%\kbdjpn.dll
- %System%\kbdkor.dll
- %System%\dllcache\kbd101b.dll
- %System%\dllcache\kbd101c.dll
- %System%\dllcache\kbd103.dll
- %System%\dllcache\kbd106.dll
- %System%\dllcache\kbdjpn.dll
- %System%\dllcache\kbdkor.dll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other System Modifications
This Trojan deletes the following files:
- %Application Data%\Microsoft\Internet Explorer\Quick Launch\desktop.ini
- %Application Data%\Microsoft\Internet Explorer\Quick Launch\{Random File Name}.lnk
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
It adds the following registry keys:
HKEY_CLASSES_ROOT\.1nk
HKEY_CLASSES_ROOT\.ur1
HKEY_CLASSES_ROOT\CLSID\{27AEF9E8-063F-0757-829C-A93575895E80}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.1nk
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.ur1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{27AEF9E8-063F-0757-829C-A93575895E80}
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
DontShowMeThisDialogAgain
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
DontShowMeThisDialogAgain
CompatWarningForwwwwwww.exe = "no"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "http://www.hae123.com/"
(Note: The default value data of the said registry entry is {Original Start Page}.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}r.com/ietj/008.htm?0825
- http://www.{BLOCKED}5.com/tg14802.htm?08849
- http://www.{BLOCKED}3.com
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
Restart in Safe Mode
Step 3
Search and delete this folder
- %Program Files%\Common Files\TaoBao
Step 4
Search and delete this file
- %User Temp%\dmsf.bat
- %Program Files%\Internet Explorer\SIGNUP\wwwwwww.exe
- %Windows%\RkRealTech.exe
- %Windows%\RtkSYUdp.exe
- %Application Data%\Microsoft\Internet Explorer\Quick Launch\wwwwwww.1nk
- %System%\kbd101b.dll
- %System%\kbd101c.dll
- %System%\kbd103.dll
- %System%\kbd106.dll
- %System%\kbdjpn.dll
- %System%\kbdkor.dll
- %System%\dllcache\kbd101b.dll
- %System%\dllcache\kbd101c.dll
- %System%\dllcache\kbd103.dll
- %System%\dllcache\kbd106.dll
- %System%\dllcache\kbdjpn.dll
- %System%\dllcache\kbdkor.dll
*Note: Read the following Microsoft page if these steps do not work on Windows 7.
Step 5
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
- .1nk
- .1nk
- In HKEY_CLASSES_ROOT
- .ur1
- .ur1
- In HKEY_CLASSES_ROOT\CLSID
- {27AEF9E8-063F-0757-829C-A93575895E80}
- {27AEF9E8-063F-0757-829C-A93575895E80}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .1nk
- .1nk
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .ur1
- .ur1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {27AEF9E8-063F-0757-829C-A93575895E80}
- {27AEF9E8-063F-0757-829C-A93575895E80}
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
- DontShowMeThisDialogAgain
- DontShowMeThisDialogAgain
Step 6
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_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- From: Start Page = "http://www.hae123.com/"
To: Start Page = {Original Start Page}
- From: Start Page = "http://www.hae123.com/"
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_PHIRES.A. 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 8
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %Application Data%\Microsoft\Internet Explorer\Quick Launch\desktop.ini
- %Application Data%\Microsoft\Internet Explorer\Quick Launch\{Random File Name}.lnk
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