ADW_DOWNTANGO
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
4,853,160 bytes
EXE
No
29 Apr 2014
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.
SOLUTION
9.300
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
Search and delete these components
- %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
Step 3
Search and delete these folders
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %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
Step 4
Scan your computer with your Trend Micro product to delete files detected as ADW_DOWNTANGO. 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 5
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %User Temp%\nsh1.tmp
- %User Temp%\nsm5.tmp
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