ADW_DOWNTANGO

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.

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%\LOCALS~1
• %User Temp%\nsm5.tmp
• %User Temp%\nsm5.tmp\Slides
• %Program Files%\Red Sky
• %Program Files%\Red Sky\DownTango
• %System Root%\Documents and Settings\Wilbert
• %Application Data%\DownTango
• %User Temp%\is-2IF4M.tmp
• %User Temp%\is-I2LP1.tmp
• %User Temp%\is-I2LP1.tmp\_isetup
• %System Root%\DOCUME~1
• %System Root%\DOCUME~1\Wilbert

(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.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other System Modifications

This adware deletes the following files:

• %User Temp%\nsh1.tmp
• %User Temp%\nsm5.tmp

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

Dropping Routine

This adware drops the following files:

• %User Temp%\nsm3.tmp
• %User Temp%\nsm5.tmp\inetc.dll
• /end
• %User Temp%\nsm5.tmp\banner.bmp
• %User Temp%\nsm5.tmp\Slides\Slides.dat
• %User Temp%\nsm5.tmp\Slides\installer_screen_cut1.png
• %User Temp%\nsm5.tmp\Slides\installer_screen_cut2.png
• %User Temp%\nsm5.tmp\Slides\installer_screen_cut3.png
• %User Temp%\nsm5.tmp\System.dll
• %User Temp%\nsm5.tmp\nsDialogs.dll
• %User Temp%\nsm5.tmp\eula.rtf
• %User Temp%\nsm5.tmp\nsRichEdit.dll
• %Program Files%\Red Sky\DownTango\DownTangoFTToolbar.exe
• %Application Data%\DownTango\initial_links.txt
• %User Temp%\nsm5.tmp\nsisSlideshow.dll
• %Program Files%\Red Sky\DownTango\DownTangoSetupFiles-TlbrFree.7z
• %Desktop%\Continue installation.lnk
• %User Startup%\Continue installation.lnk
• %User Temp%\is-2IF4M.tmp\DownTangoFTToolbar.tmp
• %User Temp%\is-I2LP1.tmp\_isetup\_shfoldr.dll
• %User Temp%\is-I2LP1.tmp\isxdl.dll
• %User Temp%\is-I2LP1.tmp\IssProc.dll
• %User Temp%\is-I2LP1.tmp\dotnetfx20sp2.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

Other Details

This adware connects to the following possibly malicious URL:

• http://install.{BLOCKED}tly.com/installHandler/?action=install&ver=1.4&si=42174
• http://install.{BLOCKED}tly.com/DownTangoSetupFiles-TlbrFree.7z
• http://install.{BLOCKED}tly.com/installHandler/?action=install&ver=1.4&si=41711
• http://install.{BLOCKED}tly.com/{random path}
• {BLOCKED}.206.210

This report is generated via an automated analysis system.