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Win32.HLLM.Reset.504
Added to the Dr.Web virus database:
2016-07-13
Virus description added:
2016-07-13
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 complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Windows Update
Windows Security Center
Creates and executes the following:
'%HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe'
Executes the following:
'<SYSTEM32>\svchost.exe'
'%TEMP%\byjjjqlf.exe'
'<SYSTEM32>\cmd.exe' /C ""%TEMP%\byjjjqlf.exe""
Injects code into
the following system processes:
Modifies file system:
Creates the following files:
<LS_APPDATA>\lawhwilb.log
<LS_APPDATA>\jwaroevi\rarexsdb.exe
%TEMP%\byjjjqlf.exe
%ALLUSERSPROFILE%\Application Data\ybfcuwpc.log
Sets the 'hidden' attribute to the following files:
%HOMEPATH%\Start Menu\Programs\Startup\rarexsdb.exe
Network activity:
Connects to:
'iu###xdcys.com':443
'bc####ucjive.com':443
'rs###lwtan.com':443
'5.###.190.31':443
'74.##5.232.51':80
UDP:
DNS ASK iu###xdcys.com
DNS ASK bc####ucjive.com
DNS ASK google.com
DNS ASK rs###lwtan.com
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: ''
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