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Win32.HLLW.Autoruner2.41380
Added to the Dr.Web virus database:
2018-07-12
Virus description added:
2018-07-11
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:
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:
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:
Miscellaneous:
Searches for the following windows:
ClassName: '' WindowName: ''
ClassName: 'MS_AutodialMonitor' WindowName: ''
ClassName: 'MS_WebcheckMonitor' WindowName: ''
Creates and executes the following:
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
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