Analysis by: Roland Marco Dela Paz

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Trojan may be downloaded by other malware/grayware from remote sites.

  TECHNICAL DETAILS

File Size: 167,936 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 15 Mar 2012
Payload: Connects to URLs/IPs, Steals information, Downloads files

Arrival Details

This Trojan may be downloaded by the following malware/grayware from remote sites:

  • TROJ_SMOKE.JH

Installation

This Trojan adds the following mutexes to ensure that only one of its copies runs at any one time:

  • abc123333ppo

NOTES:

This malware may arrive as an EXE or DLL file.

If it finds itself as an exe file, it creates a window with the following title:

  • 'Updating ...'

It gathers the following information from the affected system:

  • Serial number of the affected system's hard disk
  • Running processes
  • Installed software that are registered in the HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall registry key

It then sends the gathered information to the following domains:

  • {BLOCKED}kh.com
  • {BLOCKED}gu.com

It sends the information by issuing the following HTTP request to the abovementioned domains:

  • http://{domain}/search?fr=altavista&itag=ody&q={parameter}&kgs=1&kls=0&p={parameter}

It may also download other possibly malicious file(s) from the said sites.

As of this writing, there is no reply from the C&C server.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 08.796.06
FIRST VSAPI PATTERN DATE: 24 Feb 2012

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

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


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