Analysis by: Karl Dominguez

 THREAT SUBTYPE:

Malicious Downloader

 PLATFORM:

Symbian OS

 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 unknowingly downloaded by a user while visiting malicious websites. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size: 417,540 bytes
File Type: SIS
Memory Resident: Yes
Initial Samples Received Date: 29 Jan 2011

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting malicious websites.

It may be manually installed by a user.

Autostart Technique

This Trojan drops the following files:

  • !:\sys\bin\SH_0x20029A68.dll
  • !:\sys\bin\SS_0x20029A69.dll
  • !:\sys\bin\SU_0x2002A2BA.exe
  • !:\sys\bin\SC_0x20029A6A.dll
  • !:\sys\bin\SO_0x20029A6B.dll
  • !:\sys\bin\SR_0x20029A6C.dll
  • !:\sys\bin\SG_0x2002A2B9.exe
  • !:\sys\bin\cxian.exe
  • !:\sys\bin\cll.exe
  • !:\sys\bin\qzong.exe
  • !:\System\Apps\SysK\Version\e41ca7c1.ver
  • !:\System\Apps\SysK\Version\e41ca7c0.ver
  • !:\System\Apps\SysK\data\ver.dat
  • !:\System\Apps\SysK\data\License.key
  • !:\sys\bin\SV_0x2002A2BB.exe
  • !:\System\Apps\SysK\data\tasklist.db
  • !:\System\Apps\SysK\data\smsman.db
  • !:\System\Apps\SysK\data\imsi.db
  • !:\System\Apps\SysK\data\License.key
  • !:\mycalllist.cdb
  • !:\sys\bin\EW_0x2002A2BE.exe
  • c:\System\Apps\SysK\CommTone\RunSwitch.ini
  • c:\System\Apps\SysK\CommTone\ComManSwitch.ini
  • c:\readme.dat
  • e:\System\Apps\SysK\Version\f41ca7c0.ver
  • c:\private\101f875a\import\[2002A2BB].rSC
  • c:\System\Apps\SysK\CommTone\ComManSwitch.ini
  • c:\System\Apps\SysK\CommTone\RunSwitch.ini

Other Details

This Trojan attempts to access the following websites to download files, which are possibly malicious:

  • http://4g.{BLOCKED}w.com.cn/lmg/files/systray_signed.sis

  SOLUTION

Minimum Scan Engine: 8.900

Step 1

Scan your computer with your Trend Micro product to delete files detected as SYMBOS_QZON.A. 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 2

Trend Micro Mobile Security Solution

Trend Micro Mobile Security Personal Edition protects Android smartphones and tablets from malicious and Trojanized applications. The App Scanner is free and detects malicious and Trojanized apps as they are downloaded, while SmartSurfing blocks malicious websites using your device's Android browser.

Download and install the Trend Micro Mobile Security App via Google Play.


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