Analysis by: Rhena Inocencio
ALIASES:

Win32/FlyStudio application (Symantec), Trojan.Win32.Generic.pak!cobra (Sunbelt)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

This spyware may be dropped by other malware.

It logs a user's keystrokes to steal information.

  TECHNICAL DETAILS

File Size: 634,880 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 18 Sep 2012
Payload: Logs keystrokes, Steals information

Arrival Details

This spyware may be dropped by other malware.

It may be downloaded from the following remote sites:

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
(Default) = "{Malware Path and File Name}"

Information Theft

This spyware logs a user's keystrokes to steal information.

NOTES:

It checks if the non-malicious site www.kbstar.com is opened in iexplorer.exe and then redirects users to www.{BLOCKED}tiar.com.

It sends the gathered information to the site www.{BLOCKED}tiar.com.

It modifies the system's HOSTS files to redirect users to www.{BLOCKED}ar.com once the following Web site(s) are accessed:

  • www.super-ec.cn
  • wghai.com/ec
  • qsyou.com/ec
  • www.wghai.com
  • bbs.wghai.com/forum-17-1.html
  • bbs.wghai.com/forum-12-1.html
  • bbs.wghai.com/memcp.php
  • bbs.wghai.com/ip.asp
  • bbs.wghai.com/time.asp
  • bbs.wghai.com/ec-user5.php
  • down.wghai.com/up/super-ec/.txt
  • down.wghai.com/up/super-ec/tongji.asp
  • down.wghai.com/up/super-ec/ec.txt

However, as of this writing, the site www.{BLOCKED}ar.com is inaccessible.

It also opens the non-malicious site http://www.super-ec.cn in iexplorer.exe using the following command:

  • rundll32.exe url.dll,FileProtocolHandler http://www.{BLOCKED}r-ec.cn

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.404.05
FIRST VSAPI PATTERN DATE: 18 Sep 2012
VSAPI OPR PATTERN File: 9.405.00
VSAPI OPR PATTERN Date: 19 Sep 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

Remove the malware/grayware file that dropped/downloaded TSPY_LOGGER.BDLO

Step 3

Scan your computer with your Trend Micro product and note files detected as TSPY_LOGGER.BDLO

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • (Default) = "{Malware Path and File Name}"

Step 6

Search and delete the file detected as TSPY_LOGGER.BDLO

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files in the search result.

Step 7

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

  • %System%\Drivers\etc\hosts


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