Query: write Sigma for Detects scheduled task creations or modification on a suspicious schedule type
Matching passage: Sigma rule: Detects scheduled task creations or modification on a suspicious schedule type. Logsource: windows / process_creation. Rule: title: Suspicious Schtasks Schedule Types id: 24c8392b-aa3c-46b7-a545-43f71657fe98 related: - id: 7a02e22e-b885-4404-b38b-1ddc7e65258a type: similar status: test description: Detects scheduled task creations or modification on a suspicious schedule type references: - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-change - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create - http://blog.talosintelligence.com/2022/09/lazarus-three-rats.html author: Nasreddine Bencherchali (Nextron Systems) date: 2022-09-09 tags: - attack.privilege-escalation - attack.persistence - attack.execution - attack.t1053.005 logsource: product: windows category: process_creation detection: selection_img: - Image|endswith: \schtasks.exe - OriginalFileName: schtasks.exe selection_time: CommandLine|contains: - ' ONLOGON ' - ' ONSTART ' - ' ONCE ' - ' ONIDLE ' filter_privs: CommandLine|contains: - NT AUT - ' SYSTEM' - HIGHEST condition: all of selection_* and not 1 of filter_* falsepositives: - Legitimate processes that run at logon. Filter according to your environment level: high
Near-miss passage: Sigma rule: Detects potentially suspicious explicit credential logon events where the user is trying to logon with explicit credenti. Logsource: windows / security. Rule: title: Potentially Suspicious Explicit Credential Local Logon id: e3c6d245-7b8f-4e2a-c17f-a9d0e5b38f62 status: experimental description: 'Detects potentially suspicious explicit credential logon events where the user is trying to logon with explicit credentials (username and password) that are different from the current user context. It might indicate an attacker attempting to escalate privileges after obtaining credentials for a different user account. ' references: - https://learn.microsoft.com/en-us/windows/security/threat-protection/auditing/event-4648 - https://github.com/MSNightmare/LegacyHive author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2026-07-23 tags: - attack.privilege-escalation - attack.stealth - attack.t1134 - attack.t1134.003 logsource: product: windows service: security detection: selection_eid: EventID: 4648 selection_localhost: - TargetServerName: localhost - TargetInfo: localhost - IpAddress: - 127.0.0.1 - ::1 filter_main_computer_accounts: SubjectUserName|endswith: $ filter_main_system_processes: ProcessName|startswith: - C:\Windows\System32\ - C:\Windows\SysWOW64\ - C:\Windows\WinSxS\ filter_main_program_files: ProcessName|startswith: - C:\Program Files\ - C:\Program Files (x86)\ filter_main_same_user: SubjectUserName|fieldref: TargetUserName condition: all of selection_* and not 1 of filter_main_* falsepositives: - RunAs usage from user-installed applications outside Program Files - Administrative scripts using explicit credentials from non-standard paths level: medium regression_tests_path: regression_data/rules/windows/builtin/security/win_security_explicit_credential_local_logon/info.yml