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Win32.HLLW.Autoruner2.30958
Added to the Dr.Web virus database:
2017-12-23
Virus description added:
2017-12-23
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'crss.exe' = '"%TEMP%\crss.exe" ..'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'crss.exe' = '"%TEMP%\crss.exe" ..'
Creates or modifies the following files:
%HOMEPATH%\Start Menu\Programs\Startup\crss.exe
Creates the following files on removable media:
<Drive name for removable media>:\crss.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
Executes the following:
'<SYSTEM32>\taskkill.exe' /F /IM cmd.exe
'<SYSTEM32>\taskkill.exe' /F /IM wscript.exe
Terminates or attempts to terminate
the following system processes:
Modifies file system:
Creates the following files:
%TEMP%\crss.exe
<SYSTEM32>\ctfmon.exe.new
Sets the 'hidden' attribute to the following files:
%TEMP%\crss.exe
<Drive name for removable media>:\crss.exe
Moves the following system files:
from <SYSTEM32>\ctfmon.exe to %TEMP%\46800
Moves the following files:
from %HOMEPATH%\Start Menu\Programs\Startup\desktop.ini to %TEMP%\64880
from %HOMEPATH%\Start Menu\Programs\Startup\Shortcut to startup_local.lnk to %TEMP%\28935
from %HOMEPATH%\Start Menu\Programs\Startup\Shortcut to startup_local.lnk to %TEMP%\29530
from <STUBS_DIR>\ecmd\ecmd.exe to %TEMP%\84401
from %HOMEPATH%\Start Menu\Programs\Startup\desktop.ini to %TEMP%\64077
Network activity:
Connects to:
'te#######.seeallofthatstuff.ml':1605
UDP:
DNS ASK te#######.seeallofthatstuff.ml
Miscellaneous:
Searches for the following windows:
ClassName: '' WindowName: 'AngarCl'
ClassName: '' WindowName: ''
Creates and executes the following:
Executes the following:
'<SYSTEM32>\schtasks.exe' /create /tn NYAN /tr "<Full path to file>" /sc minute /mo 1
'<SYSTEM32>\schtasks.exe' /create /tn NYANP /tr "%TEMP%\crss.exe" /sc minute /mo 5
'<SYSTEM32>\schtasks.exe' /create /tn NYAN /tr "%TEMP%\crss.exe" /sc minute /mo 1
'<SYSTEM32>\schtasks.exe' /Delete /tn NYANP /F
'<SYSTEM32>\schtasks.exe' /create /tn NYANP /tr "<Full path to file>" /sc minute /mo 5
'<SYSTEM32>\schtasks.exe' /Delete /tn NYAN /F
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