Technical Information
To ensure autorun and distribution:
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\Services\KMSServerService] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
- '%WINDIR%\KMSServerService\x86\devcon.exe' install x86\OemWin2k.inf tap0901
- '%WINDIR%\KMSServerService\x86\devcon.exe' remove tap0901
- '%WINDIR%\KMSServerService\kms.exe' /i
Executes the following:
- '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name=KSSv6 dir=in program= "%WINDIR%\KMSServerService\kms.exe" localport=1688 protocol=TCP action=allow remoteip=any
- '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name=KSSv6 dir=out program= "%WINDIR%\KMSServerService\kms.exe" localport=1688 protocol=TCP action=allow remoteip=any
- '<SYSTEM32>\reg.exe' query "HKU\S-1-5-19"
- '<SYSTEM32>\schtasks.exe' /create /tn kms /XML %WINDIR%\KMSServerService\KMS.xml
- '<SYSTEM32>\cmd.exe' /c ""%WINDIR%\KMSServerService\TAPinstall.cmd" "
- '<SYSTEM32>\cmd.exe' /c ""%WINDIR%\KMSServerService\task.bat" "
- '<SYSTEM32>\sc.exe' create "KMSServerService" DisplayName= "KMSServerService" binPath= "%WINDIR%\KMSServerService\kms.exe" obj= "NT AUTHORITY\NetworkService" type= "own" error= "normal" start= "auto"
Modifies file system :
Creates the following files:
- %TEMP%\CabD.tmp
- %TEMP%\CabB.tmp
- %TEMP%\Cab11.tmp
- %TEMP%\CabF.tmp
- %TEMP%\Cab9.tmp
- %TEMP%\Cab3.tmp
- %TEMP%\Cab1.tmp
- %TEMP%\Cab7.tmp
- %TEMP%\Cab5.tmp
- %TEMP%\Cab15.tmp
- %TEMP%\Cab23.tmp
- %TEMP%\Cab21.tmp
- %TEMP%\Cab27.tmp
- %TEMP%\Cab25.tmp
- %TEMP%\Cab1F.tmp
- %TEMP%\Cab19.tmp
- %TEMP%\Cab17.tmp
- %TEMP%\Cab1D.tmp
- %TEMP%\Cab1B.tmp
- %APPDATA%\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
- %WINDIR%\KMSServerService\TunMirror.exe
- %WINDIR%\KMSServerService\task.bat
- %WINDIR%\KMSServerService\x64\devcon.exe
- %WINDIR%\KMSServerService\uninstallservice.bat
- %WINDIR%\KMSServerService\TAPRemove.cmd
- %WINDIR%\KMSServerService\kms.exe
- %WINDIR%\KMSServerService\HideBat.vbs
- %WINDIR%\KMSServerService\TAPInstall.cmd
- %WINDIR%\KMSServerService\KMS.xml
- %WINDIR%\KMSServerService\x64\OemWin2k.inf
- %APPDATA%\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004
- %WINDIR%\KMSServerService\x86\tap0901.sys
- %APPDATA%\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
- %APPDATA%\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004
- %WINDIR%\KMSServerService\x86\tap0901.cat
- %WINDIR%\KMSServerService\x64\tap0901.sys
- %WINDIR%\KMSServerService\x64\tap0901.cat
- %WINDIR%\KMSServerService\x86\OemWin2k.inf
- %WINDIR%\KMSServerService\x86\devcon.exe
Deletes the following files:
- %TEMP%\Cab1B.tmp
- %TEMP%\Cab1D.tmp
- %TEMP%\Cab17.tmp
- %TEMP%\Cab19.tmp
- %TEMP%\Cab1F.tmp
- %TEMP%\Cab25.tmp
- %TEMP%\Cab27.tmp
- %TEMP%\Cab21.tmp
- %TEMP%\Cab23.tmp
- %TEMP%\Cab15.tmp
- %TEMP%\Cab5.tmp
- %TEMP%\Cab7.tmp
- %TEMP%\Cab1.tmp
- %TEMP%\Cab3.tmp
- %TEMP%\Cab9.tmp
- %TEMP%\CabF.tmp
- %TEMP%\Cab11.tmp
- %TEMP%\CabB.tmp
- %TEMP%\CabD.tmp
Network activity:
Connects to:
- 'ca#####.digicert.com':80
- 'www.download.windowsupdate.com':80
- 'wp#d':80
TCP:
HTTP GET requests:
- www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
- ca#####.digicert.com/DigiCertAssuredIDRootCA.crt
- wp#d/wpad.dat
- www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootseq.txt
UDP:
- DNS ASK ca#####.digicert.com
- DNS ASK www.download.windowsupdate.com
- DNS ASK wp#d
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'EDIT' WindowName: '(null)'
