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Win32.HLLM.Reset.488

Added to the Dr.Web virus database: 2015-12-16

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,,<LS_APPDATA>\jwaroevi\rarexsdb.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'RarExsdb' = '<LS_APPDATA>\jwaroevi\rarexsdb.exe'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks the following features:
  • User Account Control (UAC)
  • Windows Security Center
Creates and executes the following:
  • '%TEMP%\byjjjqlf.exe'
Executes the following:
  • '<SYSTEM32>\svchost.exe'
Injects code into
the following system processes:
  • <SYSTEM32>\svchost.exe
Modifies file system :
Creates the following files:
  • %ALLUSERSPROFILE%\Application Data\ybfcuwpc.log
  • <LS_APPDATA>\lawhwilb.log
  • <LS_APPDATA>\jwaroevi\rarexsdb.exe
  • %TEMP%\byjjjqlf.exe
  • %TEMP%\ifqydaby.exe
Sets the 'hidden' attribute to the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe
Network activity:
Connects to:
  • 'ii###kek.com':443
  • 'tl####qvearpxq.com':443
  • 'ub###qkad.com':443
  • 'tf#####cjoviuvtr.com':443
  • 'ed#####awurxlobk.com':443
  • 'fl#####tcedehipox.com':443
  • 'tw####wnrlqcf.com':443
  • 'te##etst.ru':443
  • '74.##5.232.51':80
  • 'wc####ixqutt.com':443
  • 'mt####dphaqliva.com':443
  • 'uu#####wqjujuuprpp.com':443
UDP:
  • DNS ASK ii###kek.com
  • DNS ASK tl####qvearpxq.com
  • DNS ASK ub###qkad.com
  • DNS ASK tf#####cjoviuvtr.com
  • DNS ASK ed#####awurxlobk.com
  • DNS ASK fl#####tcedehipox.com
  • DNS ASK tw####wnrlqcf.com
  • DNS ASK te##etst.ru
  • DNS ASK google.com
  • DNS ASK wc####ixqutt.com
  • DNS ASK mt####dphaqliva.com
  • DNS ASK uu#####wqjujuuprpp.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''
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