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Win32.HLLW.Ressdt.115

Added to the Dr.Web virus database: 2017-02-14

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwmain.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\GFUpd.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\GuardField.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RavStub.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwsrv.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwProxy.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwstub.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kwatch.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RAV.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASARP.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kmailmon.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Runiep.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVPFW.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kavstart.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\HijackThis.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\PFW.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\TrojDie.KXP] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AutoRun.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kav32.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kissvc.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KPfwSvc.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ArSwp.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\SREngLdr.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RSTray.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Trojanwall.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\TrojanDetector.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\QQDoctor.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\CCenter.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AvMonitor.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AVP.COM] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\IceSword.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVSrvXP.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVMonxp.KXP] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Iparmor.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360safe.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360rpt.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\explorer\run] 'internetnet' = '<SYSTEM32>\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360tray.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AVP.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\safeboxTray.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360safebox.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Regedit.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\WOPTILITIES.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Ast.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AutoRunKiller.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ANTIARP.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\VPTRAY.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\VPC32.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Nod32kui.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Navapsvc.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVWSC.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\nod32krn.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Mmsk.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Frameworkservice.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KRegEx.EXE] 'debugger' = '<SYSTEM32>\dllcache\wuauclt.exe'
Changes the following executable system files:
  • <SYSTEM32>\dllcache\wuauclt.exe
  • <DRIVERS>\beep.sys
Substitutes the following executable system files:
  • <SYSTEM32>\wuauclt.exe with <SYSTEM32>\wuauclt.exe
Infects the following executable files:
  • <SYSTEM32>\wuauclt.exe
  • <DRIVERS>\beep.sys
Creates the following files on removable media:
  • <Drive name for removable media>:\HXSP.PIF
  • <Drive name for removable media>:\AUTORUN.INF
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Creates and executes the following:
  • 'C:\Documents and Settings\5.pif'
  • 'C:\Documents and Settings\9.pif'
  • 'C:\Documents and Settings\4.pif'
  • 'C:\Documents and Settings\7.pif'
  • 'C:\Documents and Settings\8.pif'
  • 'C:\Documents and Settings\6.pif'
  • 'C:\Documents and Settings\10.pif'
  • 'C:\Documents and Settings\2.pif'
  • 'C:\Documents and Settings\1.pif'
  • 'C:\Documents and Settings\3.pif'
  • 'C:\Documents and Settings\9.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\10.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\8.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\7.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\3.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\2.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\1.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\6.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\5.pif' (downloaded from the Internet)
  • 'C:\Documents and Settings\4.pif' (downloaded from the Internet)
Executes the following:
  • '<SYSTEM32>\cacls.exe' <SYSTEM32>\wanpacket.dll /e /p everyone:f
  • '<SYSTEM32>\cacls.exe' <DRIVERS>\acpidisk.sys /e /p everyone:f
  • '%ProgramFiles%\Internet Explorer\IEXPLORE.EXE'
  • '<SYSTEM32>\cacls.exe' %ALLUSERSPROFILE%\ЎёїЄКјЎ№ІЛµҐ\іМРт\Жф¶Ї /e /p everyone:f
  • '<SYSTEM32>\cacls.exe' <SYSTEM32>\npptools.dll /e /p everyone:f
  • '<SYSTEM32>\cacls.exe' <SYSTEM32>\pthreadVC.dll /e /p everyone:f
  • '<SYSTEM32>\cacls.exe' <SYSTEM32>\packet.dll /e /p everyone:f
  • '<SYSTEM32>\cacls.exe' <DRIVERS>\npf.sys /e /p everyone:f
  • '<SYSTEM32>\cacls.exe' <SYSTEM32>\wpcap.dll /e /p everyone:f
Terminates or attempts to terminate
the following user processes:
  • AVP.EXE
  • 360tray.exe
Restores hooked functions in System Service Descriptor Table (SSDT).
Modifies file system:
Creates the following files:
  • C:\Documents and Settings\6.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\YPORKZYZ\7[1].exe
  • C:\Documents and Settings\7.pif
  • C:\AUTORUN.INF
  • C:\HXSP.PIF
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\2VAZY7AN\6[1].exe
  • C:\Documents and Settings\9.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\2VAZY7AN\10[1].exe
  • C:\Documents and Settings\10.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\8[1].exe
  • C:\Documents and Settings\8.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\U98D4X8H\9[1].exe
  • C:\Documents and Settings\5.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\U98D4X8H\1[1].exe
  • C:\Documents and Settings\1.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\2VAZY7AN\2[1].exe
  • <SYSTEM32>\dsmdskmgrs.dll
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\x[1].gif
  • %ProgramFiles%\eff.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\4[1].exe
  • C:\Documents and Settings\4.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\U98D4X8H\5[1].exe
  • C:\Documents and Settings\2.pif
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\YPORKZYZ\3[1].exe
  • C:\Documents and Settings\3.pif
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\AUTORUN.INF
  • <Drive name for removable media>:\HXSP.PIF
  • C:\HXSP.PIF
  • <Full path to file>
  • C:\AUTORUN.INF
Deletes the following files:
  • <SYSTEM32>\mfc71.dll
Moves the following system files:
  • from <SYSTEM32>\wuauclt.exe to C:\tttmm.tep
Network activity:
Connects to:
  • 'x.##d6.com':80
  • 'localhost':1038
TCP:
HTTP GET requests:
  • http://x.##d6.com/dd/7.exe
  • http://x.##d6.com/dd/6.exe
  • http://x.##d6.com/dd/8.exe
  • http://x.##d6.com/dd/10.exe
  • http://x.##d6.com/dd/9.exe
  • http://x.##d6.com/dd/5.exe
  • http://x.##d6.com/dd/1.exe
  • http://x.##d6.com/dd/x.gif
  • http://x.##d6.com/dd/2.exe
  • http://x.##d6.com/dd/4.exe
  • http://x.##d6.com/dd/3.exe
UDP:
  • DNS ASK x.##d6.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: '' WindowName: ''
  • ClassName: 'IEFrame' WindowName: ''