In the below example, we use the Stats avg() function which calculates the average value of the numeric field being taken as input. FunctionsĪlong with commands, Splunk also provides many in-built functions which can take input from a field being analysed and give the output after applying the calculations on that field. In the below example we use the head command to filter out only the top 3 results from a search operation. You can use many in-built commands that SPL provides to simplify the process of analysing the data in the result set. In the below example, we are searching for records which contain two highlighted terms. These are the terms you mention in the search bar to get specific records from the dataset which meet the search criteria. Let us discuss all the components with the help of images in the below section − Search Terms Like Sum, Average etc.Ĭlauses − How to group or rename the fields in the result set. Search Terms − These are the keywords or phrases you are looking for.Ĭommands − The action you want to take on the result set like format the result or count them.įunctions − What are the computations you are going to apply on the results. This is achieved by learning the usage of SPL. For this, you need some additional commands to be added to the existing command. For example, when you get a result set for a search term, you may further want to filter some more specific terms from the result set. Please let me know if you have any other questions.The Splunk Search Processing Language (SPL) is a language containing many commands, functions, arguments, etc., which are written to get the desired results from the datasets. I've added your suggestion to NetWitness Ideas. Medium=32 & reference.id='5145' & obj.name = '\\\\*\\ipc$' & (filename ends '-stdin','-stdout','-stderr' & not(filename begins 'psexesvc'))Īpplication Rule (to alert on occurence is similar to Investigate/Navigate): Investigate \ Navigate drill, advanced drill is pretty much the same: Note: If you are building this using value pick then obj.name will show as obj.name = '\\*\ipc$' So this is the value you might paste into query of Investigate / Events. Medium=32 AND reference.id='5145' AND obj.name = '\\\\*\\ipc$' AND (filename ends '-stdin','-stdout','-stderr' AND NOT(filename begins 'psexesvc')) Medium=32 AND (reference.id='5145' AND obj.name = '\\\\*\\ipc$' AND filename ends '-stdin','-stdout','-stderr') AND NOT(reference.id='5145' AND obj.name = '\\*\ipc$' AND filename begins 'psexesvc')Ī less redundant version of the query would be: Notes: Value comparison for text is case insensitive by default (so the value of ipc$ would cover both IPC$, Ipc$ & ipc$)Ī literal conversion of Investigation drill (Investigation \ Events) would be: I found sample logs for EventID: 5145 with the similar string of: Note: In the rule \\*\IPC$ is a literal and * is not a wildcard Looking at the source rule: it mentions tag attack.t1077 and references blog: If I put the syntax of '(((name contains 'IPC$') & (path contains '-stdin', '-stdout', '-stderr')) & NOT((name contains 'IPC$') & (path contains 'PSEXESVC')))' into and output to Sigma it references an outdated version of
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |