PUA.Win32.OpenCandy.GN
Win32/OpenCandy Potentially Unsafe(ESET-NOD32); HEUR:AdWare.Win32.OpenCandy.gen(KASPERSKY)
Windows
Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.
TECHNICAL DETAILS
Arrival Details
This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It may be manually installed by a user.
Installation
This Potentially Unwanted Application drops the following files:
- %User Temp%\nsu{random characters}.tmp\System.dll
- %User Temp%\nsu{random characters}.tmp\LangDLL.dll
- %User Temp%\nsu{random characters}.tmp\OCSetupHlp.dll
- %Program Files%\MediaInfo\MediaInfo.exe
- %Program Files%\MediaInfo\MediaInfo_InfoTip.dll
- %Program Files%\MediaInfo\MediaInfo.dll
- %Program Files%\MediaInfo\History.txt
- %Program Files%\MediaInfo\License.html
- %Program Files%\MediaInfo\ReadMe.txt
- %Program Files%\MediaInfo\Plugin\Custom\Example.csv
- %Program Files%\MediaInfo\Plugin\Custom\Example_HTML.csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by fields, compact (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by fields, short (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by fields, standard (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by fields, verbose (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by streams, compact (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by streams, short (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by streams, standard (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\Table by streams, verbose (HTML).csv
- %Program Files%\MediaInfo\Plugin\Custom\XML.csv
- %Program Files%\MediaInfo\Plugin\Custom\en.Example.csv
- %Program Files%\MediaInfo\Plugin\Custom\en.Example_HTML.csv
- %Program Files%\MediaInfo\Plugin\Custom\fr.Example.csv
- %Program Files%\MediaInfo\Plugin\Custom\it.Esempio.csv
- %Program Files%\MediaInfo\Plugin\Custom\it.Esempio_HTML.csv
- %Program Files%\MediaInfo\Plugin\Custom\zzz_Contrib - Dusil (HTML).csv
- %Program Files%\MediaInfo\Plugin\Language\ar.csv
- %Program Files%\MediaInfo\Plugin\Language\be.csv
- %Program Files%\MediaInfo\Plugin\Language\bg.csv
- %Program Files%\MediaInfo\Plugin\Language\ca.csv
- %Program Files%\MediaInfo\Plugin\Language\cs.csv
- %Program Files%\MediaInfo\Plugin\Language\da.csv
- %Program Files%\MediaInfo\Plugin\Language\de.csv
- %Program Files%\MediaInfo\Plugin\Language\en.csv
- %Program Files%\MediaInfo\Plugin\Language\es.csv
- %Program Files%\MediaInfo\Plugin\Language\fa.csv
- %Program Files%\MediaInfo\Plugin\Language\fr.csv
- %Program Files%\MediaInfo\Plugin\Language\gl.csv
- %Program Files%\MediaInfo\Plugin\Language\gr.csv
- %Program Files%\MediaInfo\Plugin\Language\hr.csv
- %Program Files%\MediaInfo\Plugin\Language\hu.csv
- %Program Files%\MediaInfo\Plugin\Language\it.csv
- %Program Files%\MediaInfo\Plugin\Language\ja.csv
- %Program Files%\MediaInfo\Plugin\Language\ko.csv
- %Program Files%\MediaInfo\Plugin\Language\lt.csv
- %Program Files%\MediaInfo\Plugin\Language\nl.csv
- %Program Files%\MediaInfo\Plugin\Language\pl.csv
- %Program Files%\MediaInfo\Plugin\Language\pt-BR.csv
- %Program Files%\MediaInfo\Plugin\Language\pt.csv
- %Program Files%\MediaInfo\Plugin\Language\ro.csv
- %Program Files%\MediaInfo\Plugin\Language\ru.csv
- %Program Files%\MediaInfo\Plugin\Language\sk.csv
- %Program Files%\MediaInfo\Plugin\Language\sq.csv
- %Program Files%\MediaInfo\Plugin\Language\sv.csv
- %Program Files%\MediaInfo\Plugin\Language\th.csv
- %Program Files%\MediaInfo\Plugin\Language\tr.csv
- %Program Files%\MediaInfo\Plugin\Language\uk.csv
- %Program Files%\MediaInfo\Plugin\Language\zh-CN.csv
- %Program Files%\MediaInfo\Plugin\Language\zh-TW.csv
- %Program Files%\MediaInfo\Plugin\Sheet\Example.csv
- %Program Files%\MediaInfo\Plugin\Sheet\Export example.csv
- %Program Files%\MediaInfo\MediaInfo.url
- %Programs%\MediaInfo\Website.lnk
- %Programs%\MediaInfo\Uninstall.lnk
- %Programs%\MediaInfo\History.lnk
- %Program Files%\MediaInfo\uninst.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, 7, and 8.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), 7 (32-bit), and 8 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), 7 (64-bit), and 8 (64-bit).. %Programs% is the folder that contains the user’s program groups, which is usually C:\Windows\Start Menu\Programs or C:\Documents and Settings\{User name}\Start Menu\Programs on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs on Windows Vista, 7, and 8.)
It adds the following processes:
- regsvr32 "%Program Files%\MediaInfo\MediaInfo_InfoTip.dll" /s
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), 7 (32-bit), and 8 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), 7 (64-bit), and 8 (64-bit).)
Other System Modifications
This Potentially Unwanted Application adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MediaInfo
DisplayName = "MediaInfo 0.7.37"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MediaInfo
Publisher = "MediaArea.net"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MediaInfo
UninstallString = "%Program Files%\MediaInfo\uninst.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MediaInfo
DisplayIcon = "%Program Files%\MediaInfo\MediaInfo.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MediaInfo
DisplayVersion = "0.7.37"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MediaInfo
URLInfoAbout = "http://med{BLOCKED}orge.net"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MediaInfo
NSIS:Language = "1033"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Session Manager
PendingFileRenameOperations = "\??\%User Temp%\nsu{random characters}.tmp\LangDLL.dll, , \??\%User Temp%\nsu{random characters}.tmp\, "
Other Details
This Potentially Unwanted Application connects to the following possibly malicious URL:
- http://med{BLOCKED}orge.net
SOLUTION
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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
Remove PUA.Win32.OpenCandy.GN by using its own Uninstall option
Step 4
Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.OpenCandy.GN. 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 the following Trend Micro Support pages for more information:
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