ADW_Goobzo

September 05, 2015
 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

2,296,240 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 Sep 2015

Arrival Details

This adware 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 adware creates the following folders:

  • %User Profile%\Application Data\TEMP

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other System Modifications

This adware adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Licenses

HKEY_CLASSES_ROOT\CLSID\{2C62E931-1EFB-1987-8909-2F8482348CF8}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2C62E931-1EFB-1987-8909-2F8482348CF8}\InprocServer32

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{R7C0DB872A3F777C0} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{K7C0DB872A3F777C0} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2C62E931-1EFB-1987-8909-2F8482348CF8}\InprocServer32
ThreadingModel = "Both"

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{I527EFCF8364A08FD} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{0527EFCF8364A08FD} = "{random values}"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = "3a98"

(Note: The default value data of the said registry entry is 3a98.)

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{2C62E931-1EFB-1987-8909-2F8482348CF8}\Version

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.750

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

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
    • Licenses
  • In HKEY_CLASSES_ROOT\CLSID
    • {2C62E931-1EFB-1987-8909-2F8482348CF8}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2C62E931-1EFB-1987-8909-2F8482348CF8}
    • InprocServer32

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\Licenses
    • {R7C0DB872A3F777C0} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {K7C0DB872A3F777C0} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2C62E931-1EFB-1987-8909-2F8482348CF8}\InprocServer32
    • ThreadingModel = "Both"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {I527EFCF8364A08FD} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
    • {0527EFCF8364A08FD} = "{random values}"

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters
    • From: TrapPollTimeMilliSecs = "3a98"
      To: TrapPollTimeMilliSecs = ""3a98""

Step 5

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.
  • %User Profile%\Application Data\TEMP

Step 6

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

Step 7

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2C62E931-1EFB-1987-8909-2F8482348CF8}
    • Version


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