Win32.HLLM.Reset.480
Added to the Dr.Web virus database:
2015-09-20
Virus description added:
2017-06-03
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
Executes the following:
- '<SYSTEM32>\svchost.exe'
- '%TEMP%\byjjjqlf.exe'
Injects code into
the following system processes:
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:
- 'mn###iyhlyo.com':443
- 'wh####wulfnbw.com':443
- 'ql#####xxctvfcdajw.com':443
- 'fb###qhsbun.com':443
- 'xr#####landvrrohfkp.com':443
- 'jd###bnnya.com':443
- 'jh#####prlsbpyov.com':443
- 'h3####ba720ui.com':443
- '74.##5.232.51':80
- 'vf####lyewhwrl.com':443
- 'er###asmhtm.com':443
- 'ox#####htpomjmwst.com':443
UDP:
- DNS ASK mn###iyhlyo.com
- DNS ASK wh####wulfnbw.com
- DNS ASK ql#####xxctvfcdajw.com
- DNS ASK fb###qhsbun.com
- DNS ASK xr#####landvrrohfkp.com
- DNS ASK jd###bnnya.com
- DNS ASK jh#####prlsbpyov.com
- DNS ASK h3####ba720ui.com
- DNS ASK google.com
- DNS ASK vf####lyewhwrl.com
- DNS ASK er###asmhtm.com
- DNS ASK ox#####htpomjmwst.com
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