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TROJ_WAPROX.AE

October 09, 2012
 Analysis by: Sabrina Lei Sioting
 Modified by: Mark Joseph Manahan
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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.

It connects to a website to send and receive information.

It retrieves specific information from the affected system.

  TECHNICAL DETAILS

File Size:

79,328 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

25 May 2012

Payload:

Connects to URLs/IPs, Steals information

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 copies of itself into the affected system:

  • %Program Files%\Common Files\{Random Name}\{Random Name}.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

It creates the following folders:

  • %Program Files%\Common Files\{Random Name}

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{Random Name} = ""%Program Files%\Common Files\{Random Name}\{Random Name}.exe" /{Random Letter}"

Backdoor Routine

This Trojan connects to the following websites to send and receive information:

  • http://{BLOCKED}tman.com

Information Theft

This Trojan retrieves the following information from the affected system:

  • Machine Guid
  • Client Hardware ID

NOTES:

This Trojan does not have rootkit capabilities. It also does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.200

VSAPI OPR PATTERN File:

9.139.00

VSAPI OPR PATTERN Date:

25 May 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

Identify and terminate files detected as TROJ_WAPROX.AE

[ Learn More ]
  1. 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.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

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
    • {Random Name} = ""%Program Files%\Common Files\{Random Name}\{Random Name}.exe" /{Random Letter}"

Step 4

Search and delete these folders

[ 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.
  • %Program Files%\Common Files\{Random}

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_WAPROX.AE. 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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