Win32.HLLW.Gedzac.11
Added to the Dr.Web virus database:
2012-07-28
Virus description added:
2012-08-18
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Classes\MSProgramGroup\Shell\Open\Command] '' = '<SYSTEM32>\grpconv.exe %1'
- [<HKLM>\SOFTWARE\Classes\regfile\shell\open\command] '' = '%WINDIR%\MSRundll32.exe "%1" %*'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'GrpConv' = 'grpconv -o'
- [<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '%WINDIR%\MSRundll32.exe "%1" %*'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
- Registry Editor (RegEdit)
blocks the following features:
- System Restore (SR)
- System File Checker (SFC)
Creates and executes the following:
- %WINDIR%\MSRundll32.exe "<SYSTEM32>\grpconv.exe" -o
- %WINDIR%\MSRundll32.exe
Executes the following:
- <SYSTEM32>\grpconv.exe
- <SYSTEM32>\net.exe stop SharedAccess
- <SYSTEM32>\net1.exe stop SharedAccess
- <SYSTEM32>\rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 C:\vi.inf
- <SYSTEM32>\runonce.exe -r
- %WINDIR%\regedit.exe /s c:\l.reg
Injects code into
the following system processes:
Terminates or attempts to terminate
the following user processes:
- httplook.exe
- GUARD.EXE
- magent.exe
- mpftray.exe
- MCAGENT.EXE
- fsav.exe
- Drwebwcl.exe
- fsav32.exe
- fsavgui.exe
- fsavaui.exe
- WebMoney.exe
- spidernt.exe
- zapro.exe
- ZONEALARM.EXE
- zlclient.exe
- nod.exe
- NAVAPW32.EXE
- nod32.exe
- smc.exe
- outpost.exe
- AVP.COM
- AVGCTRL.EXE
- AVP.EXE
- AVPCC.EXE
- AVP32.EXE
- ashAvast.exe
- ash.exe
- ashAvSrv.exe
- AVGCC32.EXE
- avgcc.exe
- drweb.exe
- ClamWin.exe
- Drweb32w.exe
- Drwebupw.exe
- drweb386.exe
- AVSYNMGR.EXE
- AVPM.EXE
- bdagent.exe
- ccapp.exe
- bdss.exe
Modifies settings of Windows Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFileMenu' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoCommonGroups' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoSaveSettings' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoClose' = '00000000'
Modifies file system :
Creates the following files:
Deletes the following files:
- %WINDIR%\Temp\OLD44.tmp
- %WINDIR%\Temp\OLD42.tmp
- %WINDIR%\Temp\OLD40.tmp
- %WINDIR%\Temp\OLD4A.tmp
- %WINDIR%\Temp\OLD48.tmp
- %WINDIR%\Temp\OLD46.tmp
- %WINDIR%\Temp\OLD38.tmp
- %WINDIR%\Temp\OLD36.tmp
- %WINDIR%\Temp\OLD34.tmp
- %WINDIR%\Temp\OLD3E.tmp
- %WINDIR%\Temp\OLD3C.tmp
- %WINDIR%\Temp\OLD3A.tmp
- %WINDIR%\Temp\OLD5C.tmp
- %WINDIR%\Temp\OLD5A.tmp
- %WINDIR%\Temp\OLD58.tmp
- %WINDIR%\Temp\OLD62.tmp
- %WINDIR%\Temp\OLD60.tmp
- %WINDIR%\Temp\OLD5E.tmp
- %WINDIR%\Temp\OLD50.tmp
- %WINDIR%\Temp\OLD4E.tmp
- %WINDIR%\Temp\OLD4C.tmp
- %WINDIR%\Temp\OLD56.tmp
- %WINDIR%\Temp\OLD54.tmp
- %WINDIR%\Temp\OLD52.tmp
- %WINDIR%\Temp\OLD14.tmp
- %WINDIR%\Temp\OLD12.tmp
- %WINDIR%\Temp\OLD10.tmp
- %WINDIR%\Temp\OLD1A.tmp
- %WINDIR%\Temp\OLD18.tmp
- %WINDIR%\Temp\OLD16.tmp
- %WINDIR%\Temp\OLD8.tmp
- %WINDIR%\Temp\OLD6.tmp
- C:\LELIEL.TXT
- %WINDIR%\Temp\OLDE.tmp
- %WINDIR%\Temp\OLDC.tmp
- %WINDIR%\Temp\OLDA.tmp
- %WINDIR%\Temp\OLD2C.tmp
- %WINDIR%\Temp\OLD2A.tmp
- %WINDIR%\Temp\OLD28.tmp
- %WINDIR%\Temp\OLD32.tmp
- %WINDIR%\Temp\OLD30.tmp
- %WINDIR%\Temp\OLD2E.tmp
- %WINDIR%\Temp\OLD20.tmp
- %WINDIR%\Temp\OLD1E.tmp
- %WINDIR%\Temp\OLD1C.tmp
- %WINDIR%\Temp\OLD26.tmp
- %WINDIR%\Temp\OLD24.tmp
- %WINDIR%\Temp\OLD22.tmp
Network activity:
Connects to:
- '<Private IP address>':139
- '<Private IP address>':80
- 'www.fb#.gov':80
- '<Private IP address>':445
TCP:
UDP:
Miscellaneous:
Searches for the following windows:
- ClassName: 'RegEdit_RegEdit' WindowName: ''
- ClassName: 'Shell_TrayWnd' WindowName: ''
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