Query: Sigma rule for Detects suspicious print spool service (spoolsv.exe) child processes.
Matching passage: Sigma rule: Detects suspicious print spool service (spoolsv.exe) child processes.. Logsource: windows / process_creation. Rule: title: Suspicious Spool Service Child Process id: dcdbc940-0bff-46b2-95f3-2d73f848e33b status: test description: Detects suspicious print spool service (spoolsv.exe) child processes. references: - https://github.com/microsoft/Microsoft-365-Defender-Hunting-Queries/blob/efa17a600b43c897b4b7463cc8541daa1987eeb4/Exploits/Print%20Spooler%20RCE/Suspicious%20Spoolsv%20Child%20Process.md author: Justin C. (@endisphotic), @dreadphones (detection), Thomas Patzke (Sigma rule) date: 2021-07-11 modified: 2024-12-01 tags: - attack.execution - attack.t1203 - attack.privilege-escalation - attack.t1068 logsource: category: process_creation product: windows detection: spoolsv: ParentImage|endswith: \spoolsv.exe IntegrityLevel: - System - S-1-16-16384 suspicious_unrestricted: Image|endswith: - \gpupdate.exe - \whoami.exe - \nltest.exe - \taskkill.exe - \wmic.exe - \taskmgr.exe - \sc.exe - \findstr.exe - \curl.exe - \wget.exe - \certutil.exe - \bitsadmin.exe - \accesschk.exe - \wevtutil.exe - \bcdedit.exe - \fsutil.exe - \cipher.exe - \schtasks.exe - \write.exe - \wuauclt.exe - \systeminfo.exe - \reg.exe - \query.exe suspicious_net: Image|endswith: - \net.exe - \net1.exe suspicious_net_filter: CommandLine|contains: start suspicious_cmd: Image|endswith: \cmd.exe suspicious_cmd_filter: CommandLine|contains: - .spl - route add - program files suspicious_netsh: Image|endswith: \netsh.exe suspicious_netsh_filter: CommandLine|contains: - add portopening - rule name suspicious_powershell: Image|endswith: - \powershell.exe - \pwsh.exe suspicious_powershell_filter: CommandLine|contains: .spl suspicious_rundll32_img: - Image|endswith: \rundll32.exe - OriginalFileName: RUNDLL32.EXE suspicious_rundll32_cli: CommandLine|endswith: rundll32.exe condition: spoolsv and ( suspicious_unrestricted or (suspicious_net and not suspicious_net_filter) or (suspicious_cmd and not suspicious_cmd_filter) or (suspicious_netsh and not suspicious_netsh_filter) or (suspicious_powershell and not suspicious_powershell_filter) or all of suspicious_rundll32_* ) falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects usage of "appcmd" to create new global URL rewrite rules. This behaviour has been observed being used by threat. Logsource: windows / process_creation. Rule: title: Suspicious IIS URL GlobalRules Rewrite Via AppCmd id: 7c8af9b2-dcae-41a2-a9db-b28c288b5f08 status: test description: Detects usage of "appcmd" to create new global URL rewrite rules. This behaviour has been observed being used by threat actors to add new rules so they can access their webshells. references: - https://twitter.com/malmoeb/status/1616702107242971144 - https://learn.microsoft.com/en-us/answers/questions/739120/how-to-add-re-write-global-rule-with-action-type-r author: Nasreddine Bencherchali (Nextron Systems) date: 2023-01-22 tags: - attack.stealth logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \appcmd.exe - OriginalFileName: appcmd.exe selection_cli: CommandLine|contains|all: - set - config - section:system.webServer/rewrite/globalRules - 'commit:' condition: all of selection_* falsepositives: - Legitimate usage of appcmd to add new URL rewrite rules level: medium