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Win32.HLLW.Autoruner1.16518
Added to the Dr.Web virus database:
2012-05-27
Virus description added:
2012-06-16
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'svchost' = '%WINDIR%\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'wuaclt.exe' = '%WINDIR%\javaupdate\expa.exe'
Creates the following files on removable media:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\Nueva Carpeta.exe
<Drive name for removable media>:\explore.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
Creates and executes the following:
Executes the following:
<SYSTEM32>\attrib.exe +S +H +R "G:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "F:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "H:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "J:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "I:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "R:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "Q:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "S:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "E:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "<Drive name for removable media>:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "Q:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "P:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "R:\autorun.inf"
<SYSTEM32>\ping.exe 127.0.0.1 -n 60
<SYSTEM32>\attrib.exe +S +H +R "S:\autorun.inf
<SYSTEM32>\attrib.exe +S +H +R "L:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "K:\autorun.inf
<SYSTEM32>\attrib.exe +S +H +R "M:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "O:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "N:\autorun.inf"
<SYSTEM32>\taskkill.exe /f /im explore.exe
<SYSTEM32>\reg.exe ADD HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL /v CheckedValue /t REG_DWORD /d "2" /f
<SYSTEM32>\attrib.exe +S +H +R "<Drive name for removable media>:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "F:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "E:\explore.exe"
<SYSTEM32>\ping.exe 127.0.0.1 -n 4
%WINDIR%\explorer.exe <Current directory>
<SYSTEM32>\ping.exe 127.0.0.1 -n 2
<SYSTEM32>\reg.exe ADD HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN /v CheckedValue /t REG_DWORD /d "2" /f
<SYSTEM32>\reg.exe ADD HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v wuaclt.exe /t REG_SZ /d "%WINDIR%\javaupdate\expa.exe" /f
<SYSTEM32>\attrib.exe +S +H +R "M:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "L:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "N:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "P:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "O:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "H:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "G:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "I:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "K:\explore.exe"
<SYSTEM32>\attrib.exe +S +H +R "J:\explore.exe"
Searches for windows to
detect analytical utilities:
ClassName: 'PROCMON_WINDOW_CLASS' WindowName: ''
ClassName: 'RegMonClass' WindowName: ''
ClassName: 'FileMonClass' WindowName: ''
Modifies file system :
Creates the following files:
%WINDIR%\svchost.exe
%WINDIR%\javaupdate\update_java.exe
%WINDIR%\temvir - CRNJEUFU.txt
%WINDIR%\csrss.exe
%WINDIR%\javaupdate\update.dll
<LS_APPDATA>\expa.exe
<LS_APPDATA>\svchost.exe
%WINDIR%\javaupdate\expa.exe
%TEMP%\a51921.bat
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\explore.exe
%TEMP%\a51921.bat
Network activity:
Connects to:
UDP:
DNS ASK mo####n.comxa.com
Miscellaneous:
Searches for the following windows:
ClassName: 'edit' WindowName: ''
ClassName: '' WindowName: 'TeamViewer - Registro de sucesos de la transferencia de archivos'
ClassName: '' WindowName: 'Sesion esponsorizada'
ClassName: '' WindowName: 'TeamViewer'
ClassName: '' WindowName: ''
ClassName: 'ThunderRT6FormDC' WindowName: 'Shareware Cheater v 3.0'
ClassName: 'ThunderRT6FormDC' WindowName: ''
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