Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,%HOMEPATH%\My Documents\MSDCSC\msdcsc.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MicroUpdate' = '%HOMEPATH%\My Documents\MSDCSC\msdcsc.exe'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
Creates and executes the following:
- %HOMEPATH%\My Documents\MSDCSC\msdcsc.exe
- %TEMP%\servar.exe
- %TEMP%\cbsidlm-tr1_5-NoIP_DUC_Dynamic_DNS_Update_Client-10055182.exe
Executes the following:
- <SYSTEM32>\attrib.exe "%HOMEPATH%\Local Settings\Temp" +s +h
- <SYSTEM32>\attrib.exe "%TEMP%\servar.exe" +s +h
- <SYSTEM32>\notepad.exe
Injects code into
the following system processes:
- <SYSTEM32>\notepad.exe
Modifies file system :
Creates the following files:
- %TEMP%\nsz3.tmp\download.com\iconCheck.png
- %TEMP%\nsz3.tmp\download.com\headicon.png
- %TEMP%\nsz3.tmp\download.com\decline.gif
- %TEMP%\nsz3.tmp\download.com\installNow.gif
- %TEMP%\nsz3.tmp\download.com\loading.gif
- %TEMP%\nsz3.tmp\download.com\later.gif
- %TEMP%\nsz3.tmp\download.com\installOpen.gif
- %TEMP%\nsz3.tmp\download.com\close.gif
- %TEMP%\nsz3.tmp\res\common.css
- %TEMP%\nsz3.tmp\res\common.js
- %TEMP%\nsz3.tmp\res\jquery.js
- %TEMP%\nsz3.tmp\res\knockout.js
- %TEMP%\nsz3.tmp\download.com\cancel.gif
- %TEMP%\nsz3.tmp\download.com\bg.gif
- %TEMP%\nsz3.tmp\download.com\accept.gif
- %TEMP%\nsz3.tmp\UACInfo.dll
- %TEMP%\nsz3.tmp\version.dll
- %TEMP%\nsz3.tmp\AdvancedTests.lua
- %HOMEPATH%\My Documents\My Videos\Desktop.ini
- %TEMP%\nsz3.tmp\__web.xml
- %TEMP%\nsz3.tmp\FloatingProgress.dll
- %HOMEPATH%\Start Menu\Programs\Administrative Tools\desktop.ini
- %TEMP%\nsz3.tmp\__localxml.xml
- %TEMP%\nsz3.tmp\download.com\progress.gif
- %TEMP%\nsz3.tmp\download.com\outer.har
- %TEMP%\nsz3.tmp\download.com\nextStep.gif
- %TEMP%\nsz3.tmp\download.com\progress.har
- %TEMP%\nsz3.tmp\download.com\step1of4.png
- %TEMP%\nsz3.tmp\download.com\progressPlay.gif
- %TEMP%\nsz3.tmp\download.com\progressPause.gif
- %TEMP%\nsz3.tmp\LuaSocket\lua\socket.lua
- %TEMP%\nsz3.tmp\LuaSocket\lua\mime.lua
- %TEMP%\nsz3.tmp\utils.lua
- %TEMP%\nsz3.tmp\LuaSocket\lua\ltn12.lua
- %TEMP%\nsz3.tmp\LuaSocket\lua\socket\tp.lua
- %TEMP%\nsz3.tmp\LuaSocket\lua\socket\ftp.lua
- %TEMP%\nsz3.tmp\LuaSocket\lua\socket\http.lua
- %TEMP%\nsz3.tmp\definitions.lua
- %TEMP%\nsk2.tmp
- %TEMP%\servar.exe
- %TEMP%\cbsidlm-tr1_5-NoIP_DUC_Dynamic_DNS_Update_Client-10055182.exe
- %TEMP%\nsz3.tmp\System.dll
- %TEMP%\nsz3.tmp\LuaBridge.dll
- %TEMP%\nsz3.tmp\LuaXml_lib.dll
- %TEMP%\nsz3.tmp\lua51.dll
- %TEMP%\nsz3.tmp\DownloadList.lua
- %TEMP%\nsz3.tmp\GuiInit.lua
- %HOMEPATH%\My Documents\MSDCSC\msdcsc.exe
- %TEMP%\nsz3.tmp\Events.lua
- %TEMP%\nsz3.tmp\BrowserControl.lua
- %TEMP%\nsz3.tmp\IntegratedOffer.lua
- %TEMP%\nsz3.tmp\DownloadThread.lua
- %TEMP%\nsz3.tmp\extension.tlb
- %TEMP%\nsz3.tmp\LuaSocket\socket\core.dll
- %TEMP%\nsz3.tmp\LuaSocket\lua\socket\url.lua
- %TEMP%\nsz3.tmp\LuaSocket\lua\socket\smtp.lua
- %TEMP%\nsz3.tmp\LuaSocket\mime\core.dll
- %TEMP%\nsz3.tmp\luacom.dll
- %TEMP%\nsz3.tmp\json.lua
- %TEMP%\nsz3.tmp\LuaXml.lua
Sets the 'hidden' attribute to the following files:
- %HOMEPATH%\My Documents\My Videos\Desktop.ini
- %HOMEPATH%\My Documents\MSDCSC\msdcsc.exe
Deletes the following files:
- %TEMP%\servar.exe
Network activity:
Connects to:
- 'do#####d.webinstall.com':80
- 'za#####996.no-ip.org':1604
TCP:
HTTP GET requests:
- do#####d.webinstall.com/install?fi############################################################################
UDP:
- DNS ASK do#####d.webinstall.com
- DNS ASK za#####996.no-ip.org
Miscellaneous:
Searches for the following windows:
- ClassName: '#32770' WindowName: 'Program Manager'
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: '#32770' WindowName: 'Downloading Installation Details'
- ClassName: '#32770' WindowName: ''
- ClassName: 'SysListView32' WindowName: ''
- ClassName: 'Indicator' WindowName: ''
