Analysis by: Anthony Joe Melgarejo
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 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 creates folders where it drops its files.

  TECHNICAL DETAILS

File Size: 904,161 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 05 Jul 2015

Arrival Details

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

It creates the following folders:

  • %Program Files%\BatBrowse

(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

Other System Modifications

This adware adds the following registry keys:

HKEY_CURRENT_USER\Software\BatBrowse

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1AA60054-57D9-4F99-9A55-D0FBFBE7ECD3}

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

HKEY_CURRENT_USER\Software\BatBrowse
is = "def_BatBrowse"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1AA60054-57D9-4F99-9A55-D0FBFBE7ECD3}
Default = "{GUID}"

HKEY_CURRENT_USER\Software\BatBrowse
iid = "def_BatBrowse"

HKEY_CURRENT_USER\Software\BatBrowse
id = "{installation date and time}"

Other Details

This adware connects to the following possibly malicious URL:

  • http://{BLOCKED}l.{BLOCKED}wse.com/mg?alpha={random value}
  • http://{BLOCKED}l.{BLOCKED}wse.com/ii?alpha={random value}
  • http://{BLOCKED}l.{BLOCKED}wse.com/if?alpha={random value}

  SOLUTION

Minimum Scan Engine: 9.750
SSAPI PATTERN File: 1.641.00
SSAPI PATTERN Date: 15 Jul 2015

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Close all opened browser windows

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
    • BatBrowse
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {1AA60054-57D9-4F99-9A55-D0FBFBE7ECD3}

Step 5

Search and delete these folders

[ 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.
  • %Program Files%\BatBrowse

Step 6

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