TROJ_FAKEAV.SMA3


 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan uses Windows Task Scheduler to create a scheduled task that executes the dropped copy.

As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

02 Aug 2010

Installation

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

  • %Windows%\Lcybya.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

It uses Windows Task Scheduler to create a scheduled task that executes the dropped copy.

Autostart Technique

The scheduled task executes the malware every:

  • 1 hour interval everyday

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\OTGV1DNWQQ

It adds the following registry entries:

HKEY_CURRENT_USER\Software\OTGV1DNWQQ
LnuE5 = 1

HKEY_CURRENT_USER\Software\OTGV1DNWQQ
Lnu5 = 0

HKEY_CURRENT_USER\Software\OTGV1DNWQQ
LnuEU = 0

HKEY_CURRENT_USER\Software\OTGV1DNWQQ
LnuN = 30108092

HKEY_CURRENT_USER\Software\OTGV1DNWQQ
LnuE = {random number}

Download Routine

As of this writing, the said sites are inaccessible.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}.com/ad_type.php?{random string}

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.390.11

VSAPI PATTERN Date:

17 Aug 2010

VSAPI PATTERN Date:

8/17/2010 12:00:00 AM

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

Terminate a malware/grayware process

[ Learn More ]

*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.

    Lcybya.exe

Step 3

Search and delete these files

[ 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. %Windows%\Tasks\{35DC3473-A719-4d14-B7C1-FD326CA84A0C}.job

Step 4

Delete this registry key

[ 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
    • OTGV1DNWQQ

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKEAV.SMA3. 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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