Analysis by: Rhena Inocencio
ALIASES:

Adware-OptServe (McAfee), Adware.Optserve (Symantec), Adware.Optserve (Symantec)

 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:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This adware arrives as a component bundled with malware/grayware packages. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size: 139,264 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 31 May 2013

Arrival Details

This adware arrives as a component bundled with malware/grayware packages.

It may be manually installed by a user.

Other System Modifications

This adware adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
optserve.Main

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1D6D776D-6AD7-4941-B278-D94741CA63CC}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F7A2B196-551F-47AB-9E3F-3459A5E5415C}\8a.0

It adds the following registry entries as part of its installation routine:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
optserve.Main
(Default) = "optserve.Main"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
optserve.Main\Clsid
(Default) = "{1D6D776D-6AD7-4941-B278-D94741CA63CC}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1D6D776D-6AD7-4941-B278-D94741CA63CC}
(Default) = "optserve.Main"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1D6D776D-6AD7-4941-B278-D94741CA63CC}\InprocServer32
(Default) = "{adware path and filename}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1D6D776D-6AD7-4941-B278-D94741CA63CC}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1D6D776D-6AD7-4941-B278-D94741CA63CC}\ProgID
(Default) = "optserve.Main"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1D6D776D-6AD7-4941-B278-D94741CA63CC}\VERSION
(Default) = "138.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F7A2B196-551F-47AB-9E3F-3459A5E5415C}\8a.0
(Default) = "optserve"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F7A2B196-551F-47AB-9E3F-3459A5E5415C}\8a.0\
0\win32
(Default) = "{adware path and filename}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F7A2B196-551F-47AB-9E3F-3459A5E5415C}\8a.0\
HELPDIR
(Default) = "{adware path}"

  SOLUTION

Minimum Scan Engine: 9.300
SSAPI PATTERN File: 1.410.00
SSAPI PATTERN Date: 19 Jun 2013

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

Restart in Safe Mode

[ Learn More ]

Step 3

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_LOCAL_MACHINE\SOFTWARE\Classes
    • optserve.Main
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
    • CLSID\{1D6D776D-6AD7-4941-B278-D94741CA63CC}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
    • TypeLib\{F7A2B196-551F-47AB-9E3F-3459A5E5415C}\8a.0

Step 4

Restart in normal mode and scan your computer with your Trend Micro product for files detected as ADW_OPTSERVE. 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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