I have Windows logs being aggregated to a syslog server which is messing with the format a little bit and I'm trying to work a regular expression (PCRE) to be reformat it a little so I can extract some key/value pairs
I've had a go at the regular expression myself, but I'm stuck on the fact that each "Message" section has several "Headers" which have defined key/value pairs underneath them.
An example would be:
An attempt was made to access an object. Subject: Security ID: NT AUTHORITY\SYSTEM Account Name: NAME$ Account Domain: DOMAIN Logon ID: 0x3e7 Object: Object Server: Security Object Type: File Object Name: Z:\PATH\PATH\PATH\file.log Handle ID: 0x9b0 Process Information: Process ID: 0xa84 Process Name: C:\Program Files\PROGRAM\EXECUTABLE.exe Access Request Information: Accesses: ReadData (or ListDirectory) Access Mask: 0x1
The headers would be Subject, Object and Process Information.
Where I seem to be stuck is the only delimiter here is \s regardless of a header or pair.
This has got me close.
\s([^:\s]+)\:[\s]([^\s]*) but only captures the first word in a multi-word header or key.
With /s being the only delimiter, will this be possible?
If you only want those header names you might use an alternation and list the words between word boundaries \b.
Note that you don't have to escape the : and a single \s could also be written without the square brackets.
\b(Process Information|\S+)\b:\s(\S*)
Explanation
\b Word boundary
( Capturing group 1
Process Information|\S+ Match any of the listed
) Close capturing group
\b:\s Match word boundary, : and whitespace char
(\S*) Capturing group 2 matching 0+ times a non whitespace char
See a regex demo
Related
I am sorry for enigmatic topic title, but I did not know how to put it correctly.
These are log types:
{vpnclient} Client[10.10.10.10:54576](11764): sending R_KEYCHANGE message
{vpnclient} Client[10.10.10.10:54576](16031): sending R_IPCONFIG message - client IP = 172.11.11.11/255.255.255.0, CEP = 3600 s, DNS = 172.11.1.101, 172.11.1.102
And this is my grok pattern:
^{vpnclient} %{WORD}\[%{IP:[client][ip]}:%{NUMBER:[source][port]}\]\(%{INT:[process][pid]}\): %{GREEDYDATA:message} (:?%{GREEDYDATA:kv_vpn_message})
What i want to do is forward log after hyphen (so - client IP) to kv filter.
My problem is - this type of log does not occur always, so i want to wrap the whole grok pattern, so it matches until %{GREEDYDATA:message} and also %{GREEDYDATA:kv_vpn_message}, but only when it occurs.
You can use
^{vpnclient} %{WORD}\[%{IP:[client][ip]}:%{NUMBER:[source][port]}\]\(%{INT:[process][pid]}\): %{DATA:message}(?: - %{GREEDYDATA:kv_vpn_message})?$
There are several changes:
%{DATA:message} - the message pattern is turned into a non-greedy dot pattern, .*?, with GREEDYDATA changed to DATA
(?: - %{GREEDYDATA:kv_vpn_message})? - is an optional non-capturing group that matches one or zero occurrences of - and then zero or more chars as many as possible captured into the "kv_vpn_message" group
$ - end of string anchor, it allows the "message" DATA pattern match till the end of line.
Trying to use logstash grok filters (oniguruma regex) to filter some logs. For a log entry that looks like this:
2019-03-24 17:57:14,202 p=19455 u=root | TASK [this is the task name msg=Debug message] ************************
I have written this filter:
%{DATE:date}\s%{TIME:time}\sp=(?<id>[\d]+)\su=(?<user>[\w]+)\s\|\s*TASK\s*\[(?<task>[^=]*)
Difficulty for me here, is that I need to match "task" label to exactly this:
"this is the task name". At this time "task" matches ""this is the task name msg".
And of course, this is only an example and the words themselves change from example to example.
This is an ansible log, which for some reason mixes the task name and the tasks themselves in the same log line and only uses spaces to separate them. In all the cases, I know that the task name has finished and the task details are showing, because of the "=" symbol.
So I would need to match until a "=" is found, and then negate the word behind it, in this case is "msg" (depending on the task, this word could also change).
Any ideas how to accomplish this? Thanks!
You may use
%{DATE:date}\s%{TIME:time}\su=(?<user>\w+)\s\|\s*TASK\s*\[(?<task>[^\]=]*)\s\w+=
See the regex demo
The (?<task>[^\]=]*)\s\w+= part is of interest:
(?<task>[^\]=]*) - Group named "task": [^\]=]* matches any 0+ chars other than ] and =
\s - one whitespace
\w+ - 1+ word chars
= - a = char
This is our URL structure:
http://www.disabledgo.com/access-guide/the-university-of-manchester/176-waterloo-place-2
http://www.disabledgo.com/access-guide/kingston-university/coombehurst-court-2
http://www.disabledgo.com/access-guide/kings-college-london/franklin-wilkins-building-2
http://www.disabledgo.com/access-guide/redbridge-college/brook-centre-learning-resource-centre
I am trying to create a list of groups based on the client names
/access-guide/[this bit]/...
So I can have a performance list of all our clients.
This is my regex:
/access-guide/(.*universit(y|ies)|.*colleg(e|es))/
I want it to group anything that has university/ies or college/es in it, at any point within that client name section of the URL.
At the moment, my current regex will only return groups that are X-University:
Durham-University
Plymouth-University
Cardiff-University
etc.
What does the regex need to be to have the list I'm looking for?
Do I need to have something at the end to stop it matching things after the client name? E.g. ([^/]+$)?
Thanks for your help in advance!
Depending upon your needs you may want to do:
/access-guide/([^/]*(?:university|universities|college|colleges)[^/]*)/
This will match names even if "university" or "college" is not at the end of the string. For example "college-of-the-ozarks" Note the non-capturing internal parenthesis, that should probably be used no matter what solution you go with, as you don't want to just match the word "university" or "college"
Live Example
Additionally, I don't know what may be in your but if you may have compound words you want to eliminate using a \b may be advisable. For instance if you don't want to match "miskatonic-postcollege" you may want to do something like this:
/access-guide/([^/]*\b(?:university|universities|college|colleges)\b[^/]*)/
If the client name section of the URL is after the access-guid/ and before the next /:
http://www.disabledgo.com/access-guide/the-university-of-manchester/176-waterloo-place-2
|----------------------------|
you need to use a negated character class to only match university before the regex reaches that rightmost / boundary.
As per the Reference:
You can extract pages by Page URL, Page Title, or Screen Name. Identify each one with a regex capture group (Analytics uses the first capture group for each expression)
Thus, you can use
/access-guide/([^/]*(universit(y|ies)|colleges?))
^^^^^
See demo.
The regex matches
/access-guide/ - leftmost boundary, matches /access-guide/ literally
[^/]* - any character other than / (so we still remain in that customer section)
(universit(y|ies)|colleges?) - university, or universities, orcollegeorcolleges` literally. Add more if needed.
Assuming I have some strings of the following type:
session opened by (uid=0)
session opened by scotty
Is it possible to write a regex that will either capture the text "root" if (uid=0) is found in the string, otherwise capture the normal user name (i.e. scotty)?
Regex does not allow you to capture anything that is missing from the input string. If you know the structure of the input text, you can have a regex pattern return the required part. Here is an example that works for .NET-based regex flavor:
(?s)(?<=\(uid=0\).*opened by )\w+
Matches Found:
[0][0] = scotty
World's most convuluted title I know, an example should explain it better. I have a large txt file in the below format, though details and amount of lines will change everytime:
Username: john_joe Owner: John Joe
Account:
CLI:
Default:
LGICMD:
Flags:
Primary days:
Secondary days:
No access restrictions
Expiration:
Pwdlifetime:
Last Login:
Maxjobs:
Maxacctjobs:
Maxdetach:
Prclm:
Prio:
Queprio:
CPU:
Authorized Privileges:
BYPASS
Default Privileges:
SYSPRV
This sequence is repeated a couple of thousand times for different users. I need to find every user (ideally the entire first line of the above) that has SYSPRV under "Default Permissions".
I know I could write an application to do this, I was just hoping their might be a nice regex I could use.
Cheers
^Username:\s*(\S+)((?!^Username).)*Default Privileges:\s+SYSPRV
with the option to make ^ match start of line, and to make dot match newlines, will isolate those records and capture the username in backreference no. 1. Tell me which language you're using, and I'll provide a code sample.
Explanation:
^Username:\s: match "Username" at the start of the line, a colon and any whitespace.
(\S)+": match any non-whitespace characters and capture them into backreference no. 1. This will be the Username.
((?!Username).)*: Match any character as long as it's not the "U" of "Username". This ensures that we won't accidentally cross over into the next record.
Default Privileges:\s+SYSPRV: match the required text.
So in Python, for example, you would use:
result = re.findall(r"(?sm)^Username:\s*(\S+)((?!^Username).)*Default Privileges:\s+SYSPRV", subject)