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TROJ_SISPROC.CK

September 11, 2013
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • 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

File Size:

740,864 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

11 Sep 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.

Installation

This Trojan creates the following folders:

  • %Application Data%\EMOTIONSOFT
  • %Application Data%\EMOTIONSOFT\HomePage
  • %User Profile%\Application Data\EMOTIONSOFT
  • %User Profile%\EMOTIONSOFT\HomePage

(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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

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
SetPageOnce = "%Program Files%\EMOTIONSOFT\HomePage\HomePage.exe"

Other System Modifications

This Trojan deletes the following files:

  • %User Profile%\HomePage\actions.txt

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage

It adds the following registry entries:

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
Internet ExplorerUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
Internet ExplorerOper = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
Internet ExplorerInstallDate = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
FirefoxUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
FirefoxOper = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
FirefoxInstallDate = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
OperaUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
OperaOper = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
OperaInstallDate = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
ChromeUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
ChromeOper = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
ChromeInstallDate = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
SafariUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
SafariOper = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
SafariInstallDate = "0"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
Internet ExplorerOper = "1"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
FirefoxInstallDate = "522ef1a5"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
OperaInstallDate = "522ef1a5"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
ChromeInstallDate = "522ef1a5"

HKEY_CURRENT_USER\Software\EMOTIONSOFT\
HomePage
SafariInstallDate = "522ef1a5"

HKEY_CURRENT_USER\Software\EMOTIONSOFT
GUID = "{71004912-4965-44f9-9cb2-225b9426ff7e}"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "www.wonderpage.org"

(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome.)

Dropping Routine

This Trojan drops the following files:

  • %Application Data%\EMOTIONSOFT\HomePage\HomePageSetup.msi
  • %User Profile%\profile\search.ini
  • %User Profile%\Opera\search.ini
  • %Application Data%\EMOTIONSOFT\HomePage\tu.bin

(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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}page.org/updates/check.php?{random characters}

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

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

[ Learn More ]

Step 3

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_CURRENT_USER\Software\EMOTIONSOFT
    • HomePage

Step 4

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\Run
    • SetPageOnce = "%Program Files%\EMOTIONSOFT\HomePage\HomePage.exe"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • Internet ExplorerUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • Internet ExplorerOper = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • Internet ExplorerInstallDate = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • FirefoxUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • FirefoxOper = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • FirefoxInstallDate = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • OperaUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • OperaOper = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • OperaInstallDate = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • ChromeUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • ChromeOper = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • ChromeInstallDate = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • SafariUrl = "A765A765A765A7BEA765A77DA77EA778A777A762A764A773A775A777A7BEA77DA762A775"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • SafariOper = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • SafariInstallDate = "0"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • Internet ExplorerOper = "1"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • FirefoxInstallDate = "522ef1a5"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • OperaInstallDate = "522ef1a5"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • ChromeInstallDate = "522ef1a5"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT\HomePage
    • SafariInstallDate = "522ef1a5"
  • In HKEY_CURRENT_USER\Software\EMOTIONSOFT
    • GUID = "{71004912-4965-44f9-9cb2-225b9426ff7e}"

Step 5

Restore these modified registry values

[ 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 = "www.wonderpage.org"
      To: Start Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome""

Step 6

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %Application Data%\EMOTIONSOFT\HomePage\HomePageSetup.msi
  • %User Profile%\profile\search.ini
  • %User Profile%\Opera\search.ini
  • %Application Data%\EMOTIONSOFT\HomePage\tu.bin

Step 7

Search and delete these folders

[ 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.
  • %Application Data%\EMOTIONSOFT
  • %Application Data%\EMOTIONSOFT\HomePage
  • %User Profile%\Application Data\EMOTIONSOFT
  • %User Profile%\EMOTIONSOFT\HomePage

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_SISPROC.CK. 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.

  • %User Profile%\HomePage\actions.txt


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