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Win32.HLLW.Autoruner2.41380

Added to the Dr.Web virus database: 2018-07-12

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'crsss' = '<SYSTEM32>\TxoMoU.Exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\AuToRUN.Inf
  • <Drive name for removable media>:\soS.Exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
blocks execution of the following system utilities:
  • Windows Task Manager (Taskmgr)
Terminates or attempts to terminate
the following user processes:
  • 360tray.exe
Modifies file system:
Creates the following files:
  • <SYSTEM32>\TxoMoU.Exe
  • <Current directory>\<File name>.bat
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\table[1].txt
  • <SYSTEM32>\FUEx.CoM
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\U98D4X8H\IE[1].txt
  • <SYSTEM32>\FUEb.CoM
  • <SYSTEM32>\Autorun.Inf
  • C:\soS.Exe
  • C:\Autorun.Inf
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\2VAZY7AN\url[1].txt
  • <SYSTEM32>\FUEc.CoM
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\YPORKZYZ\table[1].txt
  • %HOMEPATH%\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\IE[1].txt
Sets the 'hidden' attribute to the following files:
  • C:\soS.Exe
  • C:\Autorun.Inf
  • <Drive name for removable media>:\AuToRUN.Inf
  • <Drive name for removable media>:\soS.Exe
Deletes the following files:
  • <Full path to file>
Network activity:
Connects to:
  • 'localhost':1039
  • 'ss#.#69222.com':80
TCP:
HTTP GET requests:
  • http://ss#.#69222.com/table.txt
  • http://ss#.#69222.com/IE.txt
  • http://ss#.#69222.com/url.txt
UDP:
  • DNS ASK ss#.#69222.com
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: ''
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
Creates and executes the following:
  • '<SYSTEM32>\TxoMoU.Exe'
Executes the following:
  • '<SYSTEM32>\reg.exe' ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /V crsss /T REG_SZ /D <SYSTEM32>\TxoMoU.Exe /F
  • '<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\WindowsUpdate /v DisableWindowsUpdateAccess /t REG_dword /d 00000001 /f
  • '<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_dword /d 00000001 /f
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\EXPlorer\Advanced" /v Hidden /t reg_dWord /d 00000000 /f
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v HideFileExt /t reg_dword /d 00000001 /f
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v ShowSuperHidden /t reg_dword /d 00000000 /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL" /v CheckedValue /t REG_SZ /d 0 /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN" /v CheckedValue /t REG_dword /d 00000002 /f
  • '%ProgramFiles%\Internet Explorer\IEXPLORE.EXE'
  • '<SYSTEM32>\cmd.exe' /c <Current directory>\<File name>.bat
  • '<SYSTEM32>\cmd.exe' /c ""<Current directory>\<File name>.bat""
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /t REG_EXPAND_SZ /d MZђ
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel" /v "HomePage" /t REG_DWORD /d 00000001 /f