TSPY_AIBATOOK.LIX

March 21, 2014
 Analysis by: Mark Joseph Manahan
 ALIASES:

Mal/DelpDldr-F (Webroot) ,Mal/DelpDldr-F (Sophos) ,a variant of Win32/Spy.Aibatook.B trojan (Eset)

 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: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

This spyware may be dropped by other malware.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

131,072 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

24 Feb 2014

Payload:

Connects to URLs/IPs, Steals information

Arrival Details

This spyware may be dropped by the following malware:

  • SWF_EXPLOIT.PB

Installation

This spyware drops the following files:

  • %Application Data%\ini.ini

(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 drops the following copies of itself into the affected system:

  • %Application Data%\{random}.dll

(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.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
TcpIpCfg = "rundll32 "%Application Data%\{random}.dll" Main Thread"

Download Routine

This spyware downloads updated copies of itself from the following websites:

  • http://www.{BLOCKED}u.com/conhost.exe?{random}

Information Theft

This spyware accesses the following site to download its configuration file:

  • http://{BLOCKED}e.{BLOCKED}a.ne.jp/ml6557

It gathers the following data:

  • Mac Address
  • OS Version
  • Antivirus installed
    where {AV Installed} is any of the following:
    ALYac
    PC-cillin
    Avast
    McAfee
    MSE
    Naver
    RoboScan
    Vr3Lite
    V3 IS
    AVG
    Avira
    AVP
    Symantec
    Nod32
    Virus Chaser

Other Details

This spyware connects to the following website to send and receive information:

  • http://www.{BLOCKED}s.com/getp.asp?MAC={Mac Address}&VER={OS Info} %20Antivirus:{AV Installed}

NOTES:

This spyware attempts to steal information such as user names, passwords, and PINs used when logging into the following banking or finance-related websites:

  • Mizuho Bank
  • Japan Post Bank

The stolen information from the monitored banks are user names/passwords and/or authentication codes.

It displays certain phishing pages.

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.628.03

FIRST VSAPI PATTERN DATE:

25 Feb 2014

VSAPI OPR PATTERN File:

10.629.00

VSAPI OPR PATTERN Date:

26 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 the malware/grayware file that dropped/downloaded TSPY_AIBATOOK.LIX

     
    • SWF_EXPLOIT.PB

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • TcpIpCfg = "rundll32 "%Application Data%\{random}.dll" Main Thread"

Step 5

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • %Application Data%\ini.ini

Step 6

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