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TSPY_DOWNLOADER_CA083910.TOMC

June 02, 2014
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This spyware 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:

528,248 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

28 Jan 2014

Arrival Details

This spyware 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 spyware creates the following folders:

  • %Windows%\Agreehtml

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

Other System Modifications

This spyware modifies the following file(s):

  • %Windows%\inf\intl.PNF

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

It deletes the following files:

  • %Windows%\Agreehtml\default.html
  • %Windows%\fonts\msgothic.ttf
  • %Windows%\fonts\msuigoth.ttf
  • %Windows%\fonts\MSMINCHO.TTF
  • %Windows%\fonts\Gulim.ttf
  • %Windows%\fonts\Gulimche.ttf
  • %Windows%\fonts\Dotum.ttf
  • %Windows%\fonts\Batang.ttf
  • %Windows%\fonts\Gungsuh.ttf
  • %Windows%\fonts\Simsun.ttf
  • %Windows%\fonts\nsimsun.ttf
  • %Windows%\fonts\MingLiU.ttf
  • %Windows%\fonts\pmingliu.ttf
  • %System%\SETC.tmp
  • %System%\kbd101b.dll
  • %System%\SET12.tmp
  • %System%\kbd101c.dll
  • %System%\SET18.tmp
  • %System%\kbd103.dll
  • %System%\SET1E.tmp
  • %System%\kbd106.dll
  • %System%\SET24.tmp
  • %System%\kbdjpn.dll
  • %System%\SET2A.tmp
  • %System%\kbdkor.dll

(Note: %Windows% is the Windows folder, which is usually C:\Windows.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Enable = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Size = "a"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
InitHits = "64"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Factor = "14"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International
W2KLpk = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International
W2KLpk = "0"

Dropping Routine

This spyware drops the following files:

  • %System%\SET9.tmp
  • %System%\SETF.tmp
  • %System%\SET15.tmp
  • %System%\SET1B.tmp
  • %System%\SET21.tmp
  • %System%\SET27.tmp
  • %System%\SETC.tmp
  • %System%\SET12.tmp
  • %System%\SET18.tmp
  • %System%\SET1E.tmp
  • %System%\SET24.tmp
  • %System%\SET2A.tmp

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}ng.com/view_dat/?dCode=
  • http://down.{BLOCKED}ng.com/down/data_file
  • http://{BLOCKED}ng.com/default_yak.html?dCode=
  • http://down.{BLOCKED}ng.com/down/nwndfssb/nwndfssb_.khw

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

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\Microsoft\Internet Explorer\International
    • CpMRU

Step 3

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\Internet Explorer\International\CpMRU
    • Enable = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
    • Size = "a"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
    • InitHits = "64"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
    • Factor = "14"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
    • W2KLpk = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
    • W2KLpk = "0"

Step 4

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.
  • %System%\SET9.tmp
  • %System%\SETF.tmp
  • %System%\SET15.tmp
  • %System%\SET1B.tmp
  • %System%\SET21.tmp
  • %System%\SET27.tmp
  • %System%\SETC.tmp
  • %System%\SET12.tmp
  • %System%\SET18.tmp
  • %System%\SET1E.tmp
  • %System%\SET24.tmp
  • %System%\SET2A.tmp

Step 5

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.
  • %Windows%\Agreehtml

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_DOWNLOADER_CA083910.TOMC. 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 deleted/modified files and/or registry entries from backup

*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

    • %Windows%\inf\intl.PNF

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.

  • %Windows%\Agreehtml\default.html
  • %Windows%\fonts\msgothic.ttf
  • %Windows%\fonts\msuigoth.ttf
  • %Windows%\fonts\MSMINCHO.TTF
  • %Windows%\fonts\Gulim.ttf
  • %Windows%\fonts\Gulimche.ttf
  • %Windows%\fonts\Dotum.ttf
  • %Windows%\fonts\Batang.ttf
  • %Windows%\fonts\Gungsuh.ttf
  • %Windows%\fonts\Simsun.ttf
  • %Windows%\fonts\nsimsun.ttf
  • %Windows%\fonts\MingLiU.ttf
  • %Windows%\fonts\pmingliu.ttf
  • %System%\SETC.tmp
  • %System%\kbd101b.dll
  • %System%\SET12.tmp
  • %System%\kbd101c.dll
  • %System%\SET18.tmp
  • %System%\kbd103.dll
  • %System%\SET1E.tmp
  • %System%\kbd106.dll
  • %System%\SET24.tmp
  • %System%\kbdjpn.dll
  • %System%\SET2A.tmp
  • %System%\kbdkor.dll


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