Analysis by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

However, due to errors in its code, it fails to perform its intended routine.

  TECHNICAL DETAILS

File Size: 402,992 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 26 Feb 2010

Arrival Details

This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This spyware adds the following folders:

  • %Current Folder%\Temp

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

  • %User Temp%\Install(comcokr).exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Information Theft

This spyware attempts to steal information from the following banks and/or other financial institutions:

  • auction.co.kr/login/real_authenticate.asp
  • auction.co.kr/Buy/Through.aspx
  • gmarket.co.kr/challenge/neo_search/gplussearch_total.asp
  • mybank.co.kr
  • nonghyup.com
  • nonghyup.co.kr
  • pusanbank.co.kr
  • kbstar.com
  • wooribank.com
  • shinhan.com
  • keb.co.kr
  • citibank.co.kr
  • kiupbank.co.kr
  • scfirstbank.com
  • hanabank.com
  • hanabank.co.kr
  • suhyup.co.kr
  • suhyup-bank.com
  • epostbank.go.kr
  • kdb.co.kr
  • cu.co.kr
  • kfcc.co.kr
  • kfcc.com
  • iptime.co.kr
  • ibk.co.kr
  • hksb.co.kr

Other Details

However, due to errors in its code, it fails to perform its intended routine.

  SOLUTION

Minimum Scan Engine: 8.900
SSAPI PATTERN File: 0.900.08
SSAPI PATTERN Date: 26 Feb 2010

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

Terminate a process file/s detected as TSPY_BANKER.ZZP

[ Learn More ]

*Note: If the detected file/s is/are not displayed in theWindows Task Manager, continue doing the next steps.

Step 3

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Current Folder%\Temp

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.ZZP. 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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