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Win32.HLLM.Reset.497
Added to the Dr.Web virus database:
2016-05-02
Virus description added:
2017-12-08
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 execution of the following system utilities:
Windows Update
Windows Security Center
blocks the following features:
User Account Control (UAC)
Windows Security Center
Injects code into
the following system processes:
Modifies file system:
Creates the following files:
<LS_APPDATA>\jwaroevi\rarexsdb.exe
%ALLUSERSPROFILE%\Application Data\ybfcuwpc.log
<LS_APPDATA>\lawhwilb.log
<Current directory>\̬
%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:
'np####rvyhelagx.com':443
'wg####uaqcrx.com':443
'mr###cokvjc.com':443
'ct#####cxftdsaiqvk.com':443
'fk#####horadylfslg.com':443
'ao###aoc.com':443
'bh###fdfug.com':443
'do#######bjesfbejfbkjsej88.com':443
'74.##5.232.51':80
'fb###tbs.com':443
'no###yyj.com':443
'si###dtrv.com':443
UDP:
DNS ASK np####rvyhelagx.com
DNS ASK wg####uaqcrx.com
DNS ASK mr###cokvjc.com
DNS ASK ct#####cxftdsaiqvk.com
DNS ASK fk#####horadylfslg.com
DNS ASK ao###aoc.com
DNS ASK bh###fdfug.com
DNS ASK do#######bjesfbejfbkjsej88.com
DNS ASK google.com
DNS ASK fb###tbs.com
DNS ASK no###yyj.com
DNS ASK si###dtrv.com
Miscellaneous:
Creates and executes the following:
Executes the following:
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