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:
- %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:
- 'rg#####yahatevqyuc.com':443
- 'dm####syddmelo.com':443
- 'na###wgfbt.com':443
- '74.##5.232.51':80
- 'yy######hssjhsiheush.com':443
UDP:
- DNS ASK wl#####vxjdsocgopo.com
- DNS ASK ij###bey.com
- DNS ASK pi####xtrrhl.com
- DNS ASK up###weywb.com
- DNS ASK wd###qklfjt.com
- DNS ASK mp###urw.com
- DNS ASK ev#####ophdymwmko.com
- DNS ASK eo###dkbs.com
- DNS ASK iu####vrleopw.com
- DNS ASK yd#####iplxihare.com
- DNS ASK cg###aso.com
- DNS ASK iq###rhema.com
- DNS ASK ap###oyk.com
- DNS ASK rg#####yahatevqyuc.com
- DNS ASK dm####syddmelo.com
- DNS ASK gr###pof.com
- DNS ASK google.com
- DNS ASK yy######hssjhsiheush.com
- DNS ASK na###wgfbt.com
- DNS ASK tw#####woygiwanqqb.com
- DNS ASK hf####ixcdquc.com
- DNS ASK dq#####xgofddopclb.com
- DNS ASK yf###adqq.com
- DNS ASK ja#####sqwnoscjtwiu.com
- DNS ASK lm###oefn.com
- DNS ASK eo####qykyyk.com
Miscellaneous:
Creates and executes the following:
- '%TEMP%\byjjjqlf.exe'
Executes the following:
- '<SYSTEM32>\svchost.exe'
