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:
- <SYSTEM32>\svchost.exe
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:
- '%TEMP%\byjjjqlf.exe'
Executes the following:
- '<SYSTEM32>\svchost.exe'