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Win32.HLLM.Generic.440

Added to the Dr.Web virus database: 2007-10-23

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Tok-Cirrhatus' = '"<LS_APPDATA>\smss.exe"'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%WINDIR%\BerasJatah.exe"'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Bron-Spizaetus' = '"%WINDIR%\ShellNew\sempalong.exe"'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\Empty.pif
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
blocks execution of the following system utilities:
  • Registry Editor (RegEdit)
Creates and executes the following:
  • <LS_APPDATA>\lsass.exe 
  • <LS_APPDATA>\inetinfo.exe 
  • <LS_APPDATA>\services.exe 
  • <LS_APPDATA>\smss.exe 
  • <LS_APPDATA>\winlogon.exe 
Executes the following:
  • <SYSTEM32>\at.exe 17:08 /every:M,T,W,Th,F,S,Su "%HOMEPATH%\Templates\Brengkolang.com"
  • <SYSTEM32>\at.exe /delete /y
  • %WINDIR%\explorer.exe
Modifies settings of Windows Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000001'
Modifies file system :
Creates the following files:
  • <LS_APPDATA>\csrss.exe
  • <LS_APPDATA>\inetinfo.exe
  • <LS_APPDATA>\winlogon.exe
  • <SYSTEM32>\%USERNAME%'s Setting.scr
  • %HOMEPATH%\Templates\Brengkolang.com
  • %WINDIR%\BerasJatah.exe
  • %WINDIR%\ShellNew\sempalong.exe
  • <LS_APPDATA>\smss.exe
  • <LS_APPDATA>\lsass.exe
  • <LS_APPDATA>\services.exe
Sets the 'hidden' attribute to the following files:
  • %WINDIR%\BerasJatah.exe
  • %WINDIR%\ShellNew\sempalong.exe
Network activity:
Connects to:
  • 'www.ge###ties.com':80
TCP:
HTTP GET requests:
  • www.ge###ties.com/sbllma5/IN14SDSDWVDQJD.txt
UDP:
  • DNS ASK www.ge###ties.com
  • DNS ASK google.com
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''
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