TROJ_FAKEAV.SMA3
Windows 2000, XP, Server 2003
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
Varies
EXE
Yes
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
8.900
7.390.11
17 Aug 2010
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
*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
Step 4
Delete this registry key
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
- 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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