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Win32.HLLW.Autohit.12754

Added to the Dr.Web virus database: 2011-06-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe csrcs.exe'
Malicious functions:
Creates and executes the following:
  • <SYSTEM32>\csrcs.exe 
Executes the following:
  • <SYSTEM32>\ping.exe -n 5 -w 250 127.0.0.1
  • <SYSTEM32>\cmd.exe /c "%TEMP%\suicide.bat"
Modifies file system :
Creates the following files:
  • %TEMP%\~ip.tmp
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\0D6B6PI5\checkip.dyndns[1].08988754032
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\0D6B6PI5\n09230945[1].asp
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\ULU3YH2D\whatismyip[1].4568083277
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\whatismyip[1].5907961361
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\checkip.dyndns[1].7015246223
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\SL6TKFAX\n09230945[1].asp
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\n09230945[1].asp
  • <SYSTEM32>\csrcs.exe
  • %TEMP%\fnohkqx
  • %TEMP%\aut1.tmp
  • %TEMP%\suicide.bat
  • <SYSTEM32>\autorun.inf
  • %TEMP%\fhduwxf
  • %TEMP%\aut2.tmp
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\autorun.inf
  • <SYSTEM32>\csrcs.exe
Deletes the following files:
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\0D6B6PI5\n09230945[1].asp
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\n09230945[1].asp
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\SL6TKFAX\n09230945[1].asp
  • %TEMP%\~ip.tmp
  • %TEMP%\fnohkqx
  • %TEMP%\aut1.tmp
  • %TEMP%\fhduwxf
  • %TEMP%\aut2.tmp
Deletes itself.
Network activity:
Connects to:
  • 'sa##.dip.jp':4590
  • 'ki#.##akapatama.com':4800
  • 'ch####p.dyndns.org':80
  • 'ud#.##utiesu.com':4580
  • 'www.wh###smyip.com':80
TCP:
HTTP GET requests:
  • www.wh###smyip.com/?rn#########################################
  • ch####p.dyndns.org/?rn#########################################
  • www.wh###smyip.com/automation/n09230945.asp
UDP:
  • DNS ASK sa##.dip.jp
  • DNS ASK ki#.##akapatama.com
  • DNS ASK ch####p.dyndns.org
  • DNS ASK ud#.##utiesu.com
  • DNS ASK www.wh###smyip.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''