Analysis by: kathleenno
ALIASES:

SecurityToolFraud (Symantec); Rogue:Win32/Winwebsec (Microsoft); Trojan.Win32.FakeAV.bnbp (Kaspersky); Generic FakeAlert.ama (Mcafee)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan deletes itself after execution.

  TECHNICAL DETAILS

File Size: 319,488 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 18 Mar 2011

Installation

This Trojan drops the following copies of itself into the affected system:

  • C:\Documents and Settings\All Users\Application Data\{random folder name}\{random file name}.exe

It drops the following non-malicious file:

  • C:\Documents and Settings\All Users\Application Data\{random folder name}\{random file name}

It creates the following folders:

  • C:\Documents and Settings\All Users\Application Data\{random folder name}

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
{random file name} = "C:\Documents and Settings\All Users\Application Data\{random folder name}\{random file name}.exe"

Other Details

This Trojan deletes itself after execution.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.909.00
VSAPI OPR PATTERN Date: 18 Mar 2011

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_FRAUDLO.EJ

[ 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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • {random file name} = "C:\Documents and Settings\All Users\Application Data\{random folder name}\{random file name}.exe"

Step 4

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.
  • C:\Documents and Settings\All Users\Application Data\{random folder name}

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_FRAUDLO.EJ. 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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