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Win32.HLLW.Autoruner1.55338
Added to the Dr.Web virus database:
2013-09-07
Virus description added:
2013-09-09
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe <SYSTEM32>\winsas32.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
Creates and executes the following:
'<SYSTEM32>\winsas32.exe'
Executes the following:
'<SYSTEM32>\taskkill.exe' /f /im NOD32KUI.exe /t
'<SYSTEM32>\taskkill.exe' /f /im MCUPDATE.exe /t
'<SYSTEM32>\taskkill.exe' /f /im NOD32.exe /t
'<SYSTEM32>\net1.exe' /f /im NAVSTUB.exe /t
'<SYSTEM32>\taskkill.exe' /f /im NOD32KRN.exe /t
'<SYSTEM32>\taskkill.exe' /f /im MCTOOL.exe /t
'<SYSTEM32>\taskkill.exe' /f /im NAVWNT.exe /t
'<SYSTEM32>\taskkill.exe' /f /im MCVSRTE.exe /t
'<SYSTEM32>\taskkill.exe' /f /im MCAGENT.exe /t
'<SYSTEM32>\taskkill.exe' /f /im MCMNHDLR.exe /t
'<SYSTEM32>\taskkill.exe' /c taskkill /f /im MCTOOL.exe /t
'<SYSTEM32>\taskkill.exe' /c taskkill /f /im NAVW32.exe /t
'<SYSTEM32>\taskkill.exe' /c taskkill /f /im MCVSRTE.exe /t
'<SYSTEM32>\taskkill.exe' /c taskkill /f /im MCAGENT.exe /t
'<SYSTEM32>\alg.exe' /pid=2996
'<SYSTEM32>\taskkill.exe' /pid=3104
'<SYSTEM32>\taskkill.exe' /pid=2980
'<SYSTEM32>\taskkill.exe' /pid=2992
'<SYSTEM32>\net1.exe' /c taskkill /f /im MCVSESCN.exe /t
'<SYSTEM32>\net1.exe' /pid=3048
'<SYSTEM32>\taskkill.exe' /f /im NAVW32.exe /t
'<SYSTEM32>\net.exe' STOP SharedAccess
'<SYSTEM32>\net.exe' STOP wuauserv
'<SYSTEM32>\net1.exe' STOP MCSHIELD
'<SYSTEM32>\net1.exe' STOP AntiVirservice
'<SYSTEM32>\net1.exe' STOP AntiVirScheduler
'<SYSTEM32>\net.exe' STOP MCSHIELD
'<SYSTEM32>\regsvr32.exe' /s MSWINSCK.OCX
'<SYSTEM32>\net.exe' STOP AntiVirScheduler
'<SYSTEM32>\net.exe' STOP AntiVirservice
'<SYSTEM32>\net.exe' STOP NOD32 Kernel Service
'<SYSTEM32>\taskkill.exe' /f /im NAVAPW32.exe /t
'<SYSTEM32>\taskkill.exe' /f /im NAVAPSVC.exe /t
'<SYSTEM32>\taskkill.exe' /f /im NAVDX.exe /t
'<SYSTEM32>\taskkill.exe' /f /im NAVSTUB.exe /t
'<SYSTEM32>\taskkill.exe' /f /im NAVLU32.exe /t
'<SYSTEM32>\net1.exe' STOP wuauserv
'<SYSTEM32>\net1.exe' STOP NOD32 Kernel Service
'<SYSTEM32>\net1.exe' STOP SharedAccess
'<SYSTEM32>\taskkill.exe' /f /im MCVSFTSN.exe /t
'<SYSTEM32>\taskkill.exe' /f /im MCVSESCN.exe /t
Injects code into
the following system processes:
<SYSTEM32>\taskkill.exe
<SYSTEM32>\net.exe
<SYSTEM32>\net1.exe
the following user processes:
Terminates or attempts to terminate
the following user processes:
Modifies file system :
Creates the following files:
<SYSTEM32>\winsas32.ico
<SYSTEM32>\winsas32
C:\i
<SYSTEM32>\winsas32.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>\winsas32.exe
<Drive name for removable media>:\autorun.inf
C:\autorun.inf
C:\driver.exe
Deletes the following files:
%TEMP%\~DF2DD8.tmp
C:\i
C:\driver
<Drive name for removable media>:\driver
Moves the following files:
from <SYSTEM32>\winsas32 to <SYSTEM32>\winsas32.exe
from C:\driver to C:\driver.exe
Network activity:
Connects to:
'<Private IP address>':139
'<Private IP address>':445
Miscellaneous:
Searches for the following windows:
ClassName: '(null)' WindowName: 'System Configuration Utility'
ClassName: '(null)' WindowName: '<SYSTEM32>'
ClassName: '(null)' WindowName: 'Windows Task Manager'
ClassName: '(null)' WindowName: '(null)'
ClassName: '(null)' WindowName: 'Registry Editor'
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