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Win32.HLLW.Autoruner3.520
Added to the Dr.Web virus database:
2019-10-20
Virus description added:
2019-10-21
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'Windows Update System' = '%APPDATA%\winlogon.exe'
[<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Update System' = '%APPDATA%\winlogon.exe'
Creates the following files on removable media
<Drive name for removable media>:\gggkgkgaexrgyh\dfg-2352-26235-2322322-624621221-2622255\desktop.ini
<Drive name for removable media>:\gggkgkgaexrgyh\dfg-2352-26235-2322322-624621221-2622255\usbblock.exe
<Drive name for removable media>:\autorun.inf
Malicious functions
Injects code into
the following system processes:
Modifies file system
Creates the following files
%APPDATA%\explorer.exe
%APPDATA%\winlogon.exe
%TEMP%\google_cache2.tmp
Sets the 'hidden' attribute to the following files
%APPDATA%\winlogon.exe
<Drive name for removable media>:\gggkgkgaexrgyh\dfg-2352-26235-2322322-624621221-2622255\usbblock.exe
Network activity
UDP
DNS ASK ga####585.no-ip.biz
Miscellaneous
Searches for the following windows
ClassName: '' WindowName: 'Windows Security Alert'
ClassName: '' WindowName: 'BitDefender Firewall Alert'
Creates and executes the following
'%APPDATA%\explorer.exe'
'%APPDATA%\winlogon.exe'
'%APPDATA%\winlogon.exe' ' (with hidden window)
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