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Win32.HLLW.Autoruner1.13794
Added to the Dr.Web virus database:
2012-03-22
Virus description added:
2012-04-12
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe <SYSTEM32>\winsas.exe'
Creates the following files on removable media:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\driver
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
hidden files
file extensions
blocks execution of the following system utilities:
Windows Task Manager (Taskmgr)
Registry Editor (RegEdit)
Creates and executes the following:
Executes the following:
<SYSTEM32>\net1.exe STOP NOD32 Kernel Service
<SYSTEM32>\net1.exe STOP AntiVirScheduler
<SYSTEM32>\net1.exe STOP MCSHIELD
<SYSTEM32>\net1.exe STOP AntiVirservice
<SYSTEM32>\taskkill.exe /f /im dap.exe /t
<SYSTEM32>\net1.exe STOP SharedAccess
<SYSTEM32>\net1.exe STOP wuauserv
<SYSTEM32>\net.exe STOP AntiVirScheduler
<SYSTEM32>\net.exe STOP MCSHIELD
<SYSTEM32>\regsvr32.exe /s MSWINSCK.OCX
<SYSTEM32>\net.exe STOP NOD32 Kernel Service
<SYSTEM32>\net.exe STOP SharedAccess
<SYSTEM32>\net.exe STOP wuauserv
<SYSTEM32>\net.exe STOP AntiVirservice
Modifies file system :
Creates the following files:
<SYSTEM32>\winsas.ico
<SYSTEM32>\winsas
C:\i
<SYSTEM32>\winsas.exe
<SYSTEM32>\MSWINSCK.OCX
C:\autorun.inf
C:\driver
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\driver.exe
<SYSTEM32>\winsas.exe
<Drive name for removable media>:\autorun.inf
C:\autorun.inf
C:\driver.exe
Deletes the following files:
%TEMP%\~DF38BB.tmp
C:\i
C:\driver
<Drive name for removable media>:\driver
Network activity:
Connects to:
'localhost':1051
'<Private IP address>':139
'<Private IP address>':445
Miscellaneous:
Searches for the following windows:
ClassName: '' WindowName: 'Windows Task Manager'
ClassName: '' WindowName: 'System Configuration Utility'
ClassName: '' WindowName: '<SYSTEM32>'
ClassName: '' WindowName: 'Registry Editor'
ClassName: '' WindowName: ''
ClassName: 'MS_AutodialMonitor' WindowName: ''
ClassName: 'MS_WebcheckMonitor' WindowName: ''
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