Win32.HLLW.Autoruner.55942
Added to the Dr.Web virus database:
2011-08-10
Virus description added:
2011-08-10
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ctfmon.exe] 'Debugger' = 'avgguard.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'ctfmon.exe' = 'ctfmon.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\RECYCLER\S-1-6-20-3802918391-3809376219-530039213-2313\flsched.exe
- <Drive name for removable media>:\RECYCLER\S-1-6-20-3802918391-3809376219-530039213-2313\Desktop.ini
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
blocks the following features:
Creates and executes the following:
Executes the following:
- <SYSTEM32>\ipconfig.exe /flushdns
Injects code into
the following system processes:
Terminates or attempts to terminate
the following user processes:
- MCAGENT.EXE
- fsav32.exe
- nod32.exe
- zlclient.exe
- spidernt.exe
- GUARD.EXE
- bdss.exe
- bdagent.exe
- ClamWin.exe
- fsav.exe
- Drweb32w.exe
Searches for windows to
detect analytical utilities:
- ClassName: '' WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'PROCMON_WINDOW_CLASS' WindowName: ''
- ClassName: '' WindowName: 'Registry Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'RegmonClass' WindowName: ''
- ClassName: '' WindowName: 'File Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'GBDYLLO' WindowName: ''
- ClassName: 'OLLYDBG' WindowName: ''
- ClassName: 'FilemonClass' WindowName: ''
- ClassName: 'pediy06' WindowName: ''
Hides the following processes:
- <Full path to virus>
- <SYSTEM32>\avgguard.exe
Modifies file system :
Creates the following files:
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\RECYCLER\S-1-6-20-3802918391-3809376219-530039213-2313\flsched.exe
- <SYSTEM32>\avgguard.exe
Deletes itself.
Network activity:
Connects to:
- 'se#####9.dwn-adobe.info':31960
- 'ad#####.dwn-adobe.info':8764
- 'su####.upd-adobe.info':7601
- 'up######1.dwn-adobe.info':52019
- 'bu#######.myimageshacks.info':5276
- 'se#####9.dwn-adobe.info':22048
- 'mi#####.myimageshacks.info':5276
- 'ad#####.dwn-adobe.info':34091
UDP:
- DNS ASK mi#####.myimageshacks.info
- DNS ASK up######1.dwn-adobe.info
- DNS ASK su####.upd-adobe.info
- DNS ASK se#####9.dwn-adobe.info
- DNS ASK bu#######.myimageshacks.info
- DNS ASK ad#####.dwn-adobe.info
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: '18467-41' WindowName: ''
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