Analysis by: Mark Joseph Manahan
ALIASES:

Exp/20120158-A (Sophos) ,MSWord/CVE_2012_0158.A!exploit (Fortinet) ,Exploit.Win32.CVE-2010 (Ikarus) ,Exploit:Win32/CVE-2010-3333 (Microsoft) ,Win32/Exploit.CVE-2010-3333.BA trojan (Eset) ,Trojan.Mdropper (Symantec) ,Exploit/CVE-2010-3333 (Panda)

 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:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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 the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size: 63,370 bytes
File Type: RTF
Memory Resident: No
Initial Samples Received Date: 18 Feb 2014
Payload: Connects to URLs/IPs, Downloads files

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.

Dropping Routine

This Trojan takes advantage of the following software vulnerabilities to drop malicious files:

  • CVE-2010-3333

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}e.{BLOCKED}r.com/sprite_xxx.exe

It saves the files it downloads using the following names:

  • %Application Data%\Microsoft\Windows\spoolsv.exe - detected as TSPY_ZBOT.NYIQ

(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 then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 10.614.08
FIRST VSAPI PATTERN DATE: 18 Feb 2014

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

Remove malware/grayware files dropped/downloaded by TROJ_ARTIEF.NTY

     
    • TSPY_ZBOT.NYIQ

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_ARTIEF.NTY. 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 4

Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.



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