Content

Exploit-MSWord.k

Type
Trojan
SubType
Exploit
Discovery Date
02/13/2009
Length
3,871 bytes
Minimum DAT
5525 (02/13/2009)
Updated DAT
5643 (06/11/2009)
Minimum Engine
5.3.00
Description Added
02/13/2009
Description Modified
02/17/2009 4:21 PM (PT)
Risk Assessment
Corporate User
Low-Profiled
Home User
Low-Profiled

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Characteristics

This detection covers a malicious Microsoft Word (.doc) document having a filesize of 3,871 bytes that attemps to exploit the CVE-2009-0075 vulnerability patched by Microsoft in the MS09-002 patch release.

The word document uses the xml file format. Upon opening the .doc file, Word may crash.  However, it does not always crash--on some occasions nothing directly malicious is visible and Word opens the .doc file fine.  A small red cross might be seen temporarily (about a second or two) on the page left above.

There are no macros visible embedded inside the .doc file.

However the file seems to connect to an http address.

A closer examination shows it contains an object classid : "CLSID:AE24FDAE-03C6-11D1-8B76-0080C744F389"

This is a reference to the Microsoft Scriptlet Component, called mshtml.dll.

DefaultOcxName,  with param name=URL , value="http://www.chen####.com/bbs/images/alipay/mm/jc/jc.html">

The exact url address is omitted on purpose here. It tries to access the above website and download a file called "jc.html", upon testing this file had a filesize of 9,892 bytes. It is an obfuscated JavaScript file, and is detected as Exploit-XMLhttp.d trojan, with DAT-5525 and above.

Symptoms

  • Upon opening the .doc file in Word, Word might crash completely.
  • Unexpected network traffic upon opening the file.
  • Presence of the mentioned file "jc.html", having a filesize of 9,892 bytes.

Method of Infection

  • Infection starts with the user opening up the .doc file in Word, after which the file jc.html gets downloaded onto the system. 
  • Removal

    All Users:
    Use current engine and DAT files for detection and removal.

    Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

    Additional Windows ME/XP removal considerations

    Variants

    Variants

      N/A

    All Information

    Overview -

    This detection covers a malicious Microsoft Word (.doc) document having a filesize of 3.871 bytes that attemps to exploit the CVE-2009-0075 vulnerability patched by Microsoft in the MS09-002 patch release.

    Aliases

    • XML_DLOADER.A (Trend)

    Characteristics

    Characteristics -

    This detection covers a malicious Microsoft Word (.doc) document having a filesize of 3,871 bytes that attemps to exploit the CVE-2009-0075 vulnerability patched by Microsoft in the MS09-002 patch release.

    The word document uses the xml file format. Upon opening the .doc file, Word may crash.  However, it does not always crash--on some occasions nothing directly malicious is visible and Word opens the .doc file fine.  A small red cross might be seen temporarily (about a second or two) on the page left above.

    There are no macros visible embedded inside the .doc file.

    However the file seems to connect to an http address.

    A closer examination shows it contains an object classid : "CLSID:AE24FDAE-03C6-11D1-8B76-0080C744F389"

    This is a reference to the Microsoft Scriptlet Component, called mshtml.dll.

    DefaultOcxName,  with param name=URL , value="http://www.chen####.com/bbs/images/alipay/mm/jc/jc.html">

    The exact url address is omitted on purpose here. It tries to access the above website and download a file called "jc.html", upon testing this file had a filesize of 9,892 bytes. It is an obfuscated JavaScript file, and is detected as Exploit-XMLhttp.d trojan, with DAT-5525 and above.

    Symptoms

    Symptoms -

    • Upon opening the .doc file in Word, Word might crash completely.
    • Unexpected network traffic upon opening the file.
    • Presence of the mentioned file "jc.html", having a filesize of 9,892 bytes.

    Method of Infection

    Method of Infection -

  • Infection starts with the user opening up the .doc file in Word, after which the file jc.html gets downloaded onto the system. 
  • Removal -

    Removal -

    All Users:
    Use current engine and DAT files for detection and removal.

    Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

    Additional Windows ME/XP removal considerations

    Variants

    Variants -

      N/A