Regex Condition for JSON

[jadengoho]

Hi i would like a help on our current problem.

We have this JSON log that we only need to ingest the events that satisfy the following condition.

• FolderPath = "*windows*" AND FolderPath="*personal*" AND InitiatingProcessSHA1="bbcc123448781q40410bcd6f0a2cc666b52e7abc"
• (FileName = "*vendor.exe*" OR FileName = "*stellar.exe*") AND InitiatingProcessFileName = "Setup64.exe"

{
"AccountName": "jcn001", 
  "AccountSid": "", 
  "ActionType": "ProcessCreated", 
  "DeviceName": "windowhost", 
  "EventCount": 1, 
  "FileName": "Code Helper vendor.exe", 
  "FolderPath": "/private/var/folders/d6/windows/AppTranslocation/personal/d/",  
  "InitiatingProcessCommandLine": "tasklist sample", 
  "InitiatingProcessFileName": "Setup6.exe, 
  "InitiatingProcessFolderPath": "/private/var/folders/d6/test/t/apptranslocation/test/d/visual studio code.app", 
  "InitiatingProcessParentFileName": "Setup64.exe", 
  "InitiatingProcessSHA1": "bbcc123448781q40410bcd6f0a2cc666b52e7abc", 
  "ProcessCommandLine": "tasklist jade /svc", 
  "SHA1": "bbcc123448781q40410bcd6f0a2cc666b52e7abc", 
  "SHA256": "none", 
  "Timestamp": "2021-01-22T20:11:42.103861Z"
}
{
"AccountName": "jcn001", 
  "AccountSid": "", 
  "ActionType": "ProcessComplete", 
  "DeviceName": "windowhost, 
  "EventCount": 1, 
  "FileName": "Code Helper stellar.exe", 
  "FolderPath": "/private/var/folders/d6/windows/AppTranslocation/personal/d/",  
  "InitiatingProcessCommandLine": "sample", 
  "InitiatingProcessFileName": "Code Helper (Renderer)", 
  "InitiatingProcessFolderPath": "/private/var/folders/d6/sample/t/apptranslocation", 
  "InitiatingProcessParentFileName": "Code Helper (Renderer)", 
  "InitiatingProcessSHA1": "bbcc123448781q40410bcd6f0a2cc666b52e7abc", 
  "ProcessCommandLine": "\"tasklist jade /svc ", 
  "SHA1": "bbcc123448781q40410bcd6f0a2cc666b52e7abc", 
  "SHA256": "none", 
  "Timestamp": "2021-01-22T20:11:42.103861Z"
}
{
"AccountName": "jcn001", 
  "AccountSid": "", 
  "ActionType": "Done", 
  "DeviceName": "windowhost", 
  "EventCount": 1, 
  "FileName": "Code Helper reg.exe", 
  "FolderPath": "/private/var/folders/d6/windows/AppTranslocation/company/d/",  
  "InitiatingProcessCommandLine": "sample", 
  "InitiatingProcessFileName": "Code Helper (Renderer)", 
  "InitiatingProcessFolderPath": "/private/var/folders/d6/word/", 
  "InitiatingProcessParentFileName": "Code Helper (Renderer)", 
  "InitiatingProcessSHA1": "bbcc123448781q40410bcd6f0a2cc666b52e7abc", 
  "ProcessCommandLine": "\"tasklist jade /svc ", 
  "SHA1": "bbcc123448781q40410bcd6f0a2cc666b52e7abc", 
  "SHA256": "none", 
  "Timestamp": "2021-01-22T20:11:42.103861Z"
}

  In the example - the only one that will be ingested is the first log.

NOW, the client want us to put the condition onto a REGEX format, so they could put it on configuration file.

Is there are way to achieve it ? Converting query to regex with conditions

[tscroggins]

@jadengoho 

Here's an example regular expression that assumes the JSON object keys always appear in the same order. I've also corrected "Setup6.exe, to "Setup64.exe", in your sample data, assuming it was a typo.

"FileName"\s*:\s*".*(?:vendor\.exe|stellar\.exe).*"\s*,\s*"FolderPath"\s*:\s*"(?=.*windows)(?=.*personal).*",(?:\n|.)*"InitiatingProcessFileName"\s*:\s*"Setup64\.exe",(?:\n|.)*"InitiatingProcessSHA1"\s*:\s*"bbcc123448781q40410bcd6f0a2cc666b52e7abc"