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TROJ_CLICKER.EXB

January 16, 2013
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

Win32/SiteHelp.B application (NOD32), Backdoor.Win32.BlackHole (Ikarus)

 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:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

  TECHNICAL DETAILS

File Size:

1,351,680 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

28 Dec 2012

Arrival Details

This Trojan 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 Trojan drops the following files:

  • %Program Files%\7b - for non-Windows Vista and 7
  • %AppDataLocal%\Virtual Store\Program Files\7b - for Windows Vista and 7

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://login.{BLOCKED}b.net:85/banben.asp?banben=2.2.9.9
  • http://login.{BLOCKED}b.net:85/soft/login0.asp
  • http://1.{BLOCKED}b.net:85/system.asp?username=fafa6688&banben=2.2.9.9
  • http://1.{BLOCKED}b.net:85/data.asp

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.624.04

FIRST VSAPI PATTERN DATE:

29 Dec 2012

VSAPI OPR PATTERN File:

9.625.00

VSAPI OPR PATTERN Date:

30 Dec 2012

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

Identify and terminate files detected as TROJ_CLICKER.EXB

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

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.
  • %Program Files%\7b
  • %AppDataLocal%\Virtual Store\Program Files\7b

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_CLICKER.EXB. 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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