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TROJ_PHIRES.B

April 29, 2013
 ALIASES:

Trojan:Win32/Startpage.KR (Microsoft), Generic.bfr!bb (NAI), Trojan.Win32.Generic!BT (Sunbelt), Trojan.Generic.4767774 (BitDefender), W32/StartPage.CC!tr.dldr (Fortinet)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:

  • 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.

It executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size:

253,965 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

01 Sep 2012

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 files:

  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\wwwwwww.1nk
  • %User Profile%\Local Settings\Temp\$$dmsf.bat
  • %Program Files%\Common Files\TaoBao\ÌÔ±¦.ico
  • %Program Files%\Common Files\TaoBao\СÓÎÏ·.ico
  • %Program Files%\Internet Explorer\SIGNUP\wwwwwww.exe
  • %Windows%\RkRealTech.exe
  • %Windows%\RtkSYUdp.exe
  • %Windows%\system32\kbd101b.dll
  • %Windows%\system32\kbd101c.dll
  • %Windows%\system32\kbd103.dll
  • %Windows%\system32\kbd106.dll
  • %Windows%\system32\kbdjpn.dll
  • %Windows%\system32\kbdkor.dll
  • %Windows%\system32\dllcache\kbd101b.dll
  • %Windows%\system32\dllcache\kbd101c.dll
  • %Windows%\system32\dllcache\kbd103.dll
  • %Windows%\system32\dllcache\kbd106.dll
  • %Windows%\system32\dllcache\kbdjpn.dll
  • %Windows%\system32\dllcache\kbdkor.dll
  • %User Profile%\Local Settings\Temp\ÍøÖ·Ö®¼Ò.tmp
  • %Program Files%\COMMON FILES\TaoBao\ÌÔ±¦.tmp
  • %Program Files%\COMMON FILES\TaoBao\4399СÓÎÏ·.TMP
  • %User Profile%\Local Settings\Temp\$$RAVSING.BAT
  • %User Profile%\Local Settings\Temp\$RAR{RANDOMDIGIT}.JSE
  • %Windows%\system32\SET{RANDOM_DIGIT}.tmp
  • %User Profile%\Local Settings\Temp\$RAR{RANDOM_DIGIT}.TMP

It adds the following processes:

  • %Windows%\regedit.exe
  • %Windows%\system32\cmd.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

It creates 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 executes then deletes itself afterward.

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_FILENAME}.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_CURRENT_USER\Software\Microsoft\
Internet Explorer\International

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons

HKEY_CLASSES_ROOT\CLSID\{RANDOM}

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
UserAssist\{RANDOM}\Count

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.1nk

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.ur1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{RANDOM}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{RANDOM}

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 "http://www.google.com".)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}e.{BLOCKED}w.com/
  • http://www.{BLOCKED}3.com/
  • http://www.{BLOCKED}r.com/ietj/011.htm?0825
  • www.{RANDOM_DIGIT}.com

  SOLUTION

Minimum Scan Engine:

9.300

VSAPI OPR PATTERN File:

9.874.08

VSAPI OPR PATTERN Date:

01 Aug 2012

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

Scan your computer with your Trend Micro product and note files detected as TROJ_PHIRES.B

Step 3

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • wwwwwww.1nk
  • dmsf.bat
  • wwwwwww.exe
  • RkRealTech.exe
  • RtkSYUdp.exe
  • kbd101b.dll
  • kbd101c.dll
  • kbd106.dll
  • kbd103.dll
  • kbdjpn.dll
  • kbdkor.dll
  • RAVSING.BAT
  • $RAR0426120624.JSE
dmsf.bat
  • wwwwwww.exe
  • RkRealTech.exe
  • RtkSYUdp.exe
  • kbd101b.dll
  • kbd101c.dll
  • kbd106.dll
  • kbd103.dll
  • kbdjpn.dll
  • kbdkor.dll
  • RAVSING.BAT
  • $RAR0426120624.JSE
    •
  • In the Look In drop-down list, select My Computer then press Enter.
  • Once located, select the file then press SHIFT+DELETE to delete it.

    • • For Windows Vista and Windows 7 users:

    1. Click Start>Computer.
    2. In the Search input box, type the following:
       
      • wwwwwww.1nk
      • dmsf.bat
      • wwwwwww.exe
      • RkRealTech.exe
      • RtkSYUdp.exe
      • kbd101b.dll
      • kbd101c.dll
      • kbd106.dll
      • kbd103.dll
      • kbdjpn.dll
      • kbdkor.dll
      • RAVSING.BAT
      • $RAR0426120624.JSE
    3. Once located, select the file then press SHIFT+DELETE to delete it.
      *Note: Read the following Microsoft page if these steps do not work on Windows 7.

    Step 4

    Search and delete this folder

    [ Learn More ]
    Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
    • TaoBao

    Step 5

    Delete this registry key

    [ Learn More ]

    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
    • In HKEY_CLASSES_ROOT
      • .ur1
    • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
      • International
    • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
      • HideDesktopIcons
    • In HKEY_CLASSES_ROOT\CLSID
      • {RANDOM}
    • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\UserAssist\{RANDOM}
      • Count
    • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
      • .1nk
    • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
      • .ur1
    • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
      • {RANDOM}
    • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
      • {RANDOM}

    Step 6

    Delete this registry value

    [ Learn More ]

    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\Explorer\DontShowMeThisDialogAgain
      • CompatWarningForwwwwwww.exe = "no"

    Step 7

    Restore this modified registry value

    [ Learn More ]

    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\Software\Microsoft\Internet Explorer\Main
      • From: Start Page = "%http://www.hae123.com/"
        To: Start Page = "http://www.google.com"

    Step 8

    Scan your computer with your Trend Micro product to delete files detected as TROJ_PHIRES.B. 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 9

    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_FILENAME}.lnk


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