ADW_DYCOO

 Analysis by: Rhena Inocencio

 ALIASES:

Adware:Win32/Cydoor (Microsoft), Adware/Cydoor (Panda), Cydoor (Sunbelt)

 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:

1,593,997 bytes

File Type:

EXE

Initial Samples Received Date:

07 Nov 2012

Arrival Details

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

It may be manually installed by a user.

Installation

This adware drops the following files:

  • %System%\cd_clint.dll
  • %System%\cd_load.exe
  • %System%\AdCache\b_{random number}.GIF

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

It creates the following folders:

  • %System%\AdCache
  • %System%\AdCache\Temp

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

Other System Modifications

This adware adds the following registry entries:

HKEY_CURRENT_USER\Software\Cydoor\
Adwr_167\Loct_0\Level_4\
Seqn_{random number}
Url = "www.cydoor.com/BestDeals"

HKEY_CURRENT_USER\Software\Cydoor\
Adwr_167\Loct_0\Level_4\
Seqn_{random number}
Url = "http://service.bfast.com/bfast/click?bfmid=1429031&siteid=8854274&bfpage=homelinks"

HKEY_CURRENT_USER\Software\Cydoor\
Adwr_167\Loct_0\Level_4\
Seqn_{random number}
Url = "http://www.commission-junction.com/track/track.dll?AID=1143760&PID=190859&URL=http%3A%2F%2Ffxnetworks%2Ecom%2Fshows%2Foriginals%2Fthesight%2Findexcj%2Ehtml"

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

HKEY_CLASSES_ROOT\Prod.Cap

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Prod.Cap

HKEY_CURRENT_USER\Software\Cydoor

HKEY_LOCAL_MACHINE\SOFTWARE\Cydoor

HKEY_CURRENT_USER\Software\Cydoor\
Adwr_167

HKEY_CURRENT_USER\Software\Cydoor Services