IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Suspicious PrintSpooler SPL File Created
editSuspicious PrintSpooler SPL File Created
editDetects attempts to exploit privilege escalation vulnerabilities related to the Print Spooler service including CVE-2020-1048 and CVE-2020-1337. .
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Privilege Escalation
Version: 8
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit## Threat intel Refer to CVEs, CVE-2020-1048 and CVE-2020-1337 for further information on the vulnerability and exploit. Verify that the relevant system is patched. ## Setup If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
Rule query
editfile where event.type != "deletion" and
file.extension : "spl" and
file.path : "?:\\Windows\\System32\\spool\\PRINTERS\\*" and
not process.name : ("spoolsv.exe",
"printfilterpipelinesvc.exe",
"PrintIsolationHost.exe",
"splwow64.exe",
"msiexec.exe",
"poqexec.exe")
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Exploitation for Privilege Escalation
- ID: T1068
- Reference URL: https://attack.mitre.org/techniques/T1068/