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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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