8/28/2023 0 Comments Splunk base64 decode![]() The command takes an optional action of encode or decode, and a list of fields to work on. Adds a base64 command to the Splunk search language. Next, we going to start decoding the base64 strings.Īgain, press Ctrl + Arrow-Down to go end of column, and type the formula as below: A custom command to do base64 encode/decode. Your Excel will look something like this: Then paste/ Ctrl + V to fill all column with string “ ASCII“. Then, press Ctrl + Shift + Arrow-Up to select from bottom to top. After that, type in string “ ASCII” in one of the row and copy it ( Ctrl-C). Just press Ctrl + Arrow-Down to quickly go to end/bottom of data column. Let’s say you have 300 row of data in your Excel, then fill 300 of “ ASCII” strings besides it. We need to fill up column “ ASCII” with string “ ASCII” until end/bottom of your data. Then, create 2 new column in the Excel sheet column named “ ASCII” and “ Decoded Base64“: Paste macro code given above inside the editor:Īfter that, close the editor window. Create new macro – you can give any name you want. To use it, first, we need to open the Splunk result that we exported earlier.Īfter that, press Alt-F8 to open the macro editor. TextBase64Encode = Replace(Replace(.Text, vbCr, ""), vbLf, "")įunction TextBase64Decode(strBase64, strCharset) With CreateObject("MSXML2.DOMDocument").createElement("tmp") The macro code that we’ll be using as below:įunction TextBase64Encode(strText, strCharset) MACRO) to automatically decode those base64 strings for us. Long story short, Base64 is used to encode binary data as. Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. So… We going to leverage Excel & macro (yes. To decode the Base64 hash value we found, we can use CyberChef’s From Base64 and Decode text features. How can I quickly decode all these base64 strings? We not gonna decode it one-by-one aren’t we? There are hundreds or probably thousand of it. ![]() If you decode the base64 from the example of raw event above: KGN1cmwgLXMgNDUuMTU1LjIwNS4yMzM6NTg3NC9YLlguWC5YOjQ0M3x8d2dldCAtcSAtTy0gNDUuMTU1LjIwNS4yMzM6NTg3NC9YLlguWC4xODo0NDMpfGJhc2g= The result after we export it from Splunk (opened in Excel) looks like: Using the Splunk query above, it will show you a table formatted data which contains extracted base64 under field named “ string“.
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