resource_file_get_provider: invalid resource file (runing on linux)

[thinrope]

I have been poking at the code, trying to parse various EVTX logs, using latest github releases.
Works very good for the 4 standard logs, compiles as static, GREAT!

The one thing that stumbled me is using resource providers. I couldn't figure a way to point evtxexport to the right path of the (dll in this case) provider.

I am trying to parse "Microsoft-Windows-Application-Experience/Program-Telemetry.evtx" from a mounted image of Win2008(ja) server, mounted under mnt/host/C

/tmp/evtxexport -c windows-932 -r "mnt/host/C/Windows/System32/config" -p "mnt/host/C/Windows/System32" mnt/host/C/Windows/System32/winevt/Logs/Microsoft-Windows-Application-Experience%4Program-Telemetry.evtx

The (head) of the result being:

evtxexport 20160107

Event number                    : 1
Written time                    : Aug 11, 2013 13:12:06.2323313900 UTC
Event level                     : Information (4)
User security identifier        : S-1-5-18
Computer name                   : MASKED
Provider identifier             : {EEF54E71-0661-422D-9A98-82FD4940B820}
Source name                     : Microsoft-Windows-Application-Experience
Event identifier                : 0x000002bd (701)
Resource filename               : %SystemRoot%\system32\aeevts.dll
Unable to export record: 0.

What can be a proper way to handle the %SystemRoot% and/or the whole path to the resource, in this case mnt/host/C/Windows/System32/aeevts.dll ? Is this supposed to be working in Windows (sorry, no testing win environment)?

I guess one way is to add option to replace envvars like %SystemRoot%, or just take the filename and append to -p resource_files_path provided path.

[joachimmetz]

Is this supposed to be working in Windows (sorry, no testing win environment)?

Should work in both Windows and Linux

I guess one way is to add option to replace envvars like %SystemRoot%

Not sure why you guess that but %SystemRoot% should b expanded by evtxexport:

libevtx/evtxtools/message_handle.c

Line 967 in 9bd9432

/* Get the value of %SystemRoot% from:

Also see: https://github.com/libyal/libevtx/wiki/Tools

[joachimmetz]

Any indication to why Unable to export record: 0. is reported?

[thinrope]

OK, I did some more testing, and managed to make it work better. I recompiled libevtx with verbose/debug messages and here is (the non-verbose) STDERR for the above command:

resource_file_get_provider: invalid resource file.
message_handle_get_resource_file_by_provider_identifier: unable to retrieve provider.
export_handle_export_record_event_message: unable to retrieve resource file.
export_handle_export_record_text: unable to export event message.
export_handle_export_record: unable to export record in text.
export_handle_export_records: unable to export record: 0.

I later fixed the value for search PATH to point to the C-root -p "mnt/host/C" and I got better result:

Event number            : 1
Written time            : MASKED
Event level         : Information (4)
User security identifier    : S-1-5-18
Computer name           : MASKED
Provider identifier     : {EEF54E71-0661-422D-9A98-82FD4940B820}
Source name         : Microsoft-Windows-Application-Experience
Event identifier        : 0x000002bd (701)
Resource filename       : %SystemRoot%\system32\aeevts.dll
Message filename        : %SystemRoot%\system32\aeevts.dll
Message identifier      : 0xb00002bd
Number of strings       : 0

Event number            : 2
....

That Number of strings: 0 bothers me... looking at the -f xml output it is just <EventData/>. Looking back I might have selected a bad (edge case) candidate evtx file for testing...

Or may be I still don't understand the usage, sorry. Is there a way to include the parsed/substituted message string, e.g. https://github.com/libyal/libevtx/blame/master/documentation/Windows%20XML%20Event%20Log%20%28EVTX%29.asciidoc#L1414 in the fml output?

[joachimmetz]

in the fml output?

If by fml you mean XML, no.

Number of strings

I need to double check but the message string should be still printed if there are no strings.

[thinrope]

Yes, sorry for the typo :-|
I was hoping for something along <message_string>bla bla</message/string> in the XML, but I should be able to parse the -f text output and add to -f xml when that is needed.

I confirmed that -f text prints correctly the expanded Message string when parsing Security.evtx even when Numebr of strings:0 (e.g. for eventID: 408).

Same command, same server does not print any Message string for the Microsoft-Windows-Application-Experience%4Program-Telemetry.evtx when there are strings (eventID: 500) or there are zero strings (eventID: 701), for example:

....

Event number                    : 9
Written time                    : MASKED
Event level                     : Information (4)
User security identifier        : S-1-5-18
Computer name                   : MASKED
Provider identifier             : {EEF54E71-0661-422D-9A98-82FD4940B820}
Source name                     : Microsoft-Windows-Application-Experience
Event identifier                : 0x000002bd (701)
Resource filename               : %SystemRoot%\system32\aeevts.dll
Message filename                : %SystemRoot%\system32\aeevts.dll
Message identifier              : 0xb00002bd
Number of strings               : 0

Event number                    : 10
Written time                    : MASKED
Event level                     : Information (4)
User security identifier        : MASKED
Computer name                   : MASKED
Provider identifier             : {EEF54E71-0661-422D-9A98-82FD4940B820}
Source name                     : Microsoft-Windows-Application-Experience
Event identifier                : 0x000001f4 (500)
Resource filename               : %SystemRoot%\system32\aeevts.dll
Message filename                : %SystemRoot%\system32\aeevts.dll
Message identifier              : 0xb00001f4
Number of strings               : 6
String: 1                       : 60
String: 2                       : MASKED
String: 3                       : MASKED
String: 4                       : 0x00010101
String: 5                       : MASKED-fullfile-ja-jp.exe
String: 6                       : Service Pack

Event number                    : 11
....