Query: Sigma YAML for windows / security
Matching passage: Sigma rule: Detects scenario where weak encryption is enabled for a user profile which could be used for hash/password cracking.. Logsource: windows / security. Rule: title: Weak Encryption Enabled and Kerberoast id: f6de9536-0441-4b3f-a646-f4e00f300ffd status: test description: Detects scenario where weak encryption is enabled for a user profile which could be used for hash/password cracking. references: - https://adsecurity.org/?p=2053 - https://blog.harmj0y.net/redteaming/another-word-on-delegation/ author: '@neu5ron' date: 2017-07-30 modified: 2021-11-27 tags: - attack.defense-impairment - attack.t1685 logsource: product: windows service: security definition: 'Requirements: Audit Policy : Account Management > Audit User Account Management, Group Policy : Computer Configuration\Windows Settings\Security Settings\Advanced Audit Policy Configuration\Audit Policies\Account Management\Audit User Account Management' detection: selection: EventID: 4738 olduac_des: OldUacValue|endswith: - 8??? - 9??? - A??? - B??? - C??? - D??? - E??? - F??? newuac_des: NewUacValue|endswith: - 8??? - 9??? - A??? - B??? - C??? - D??? - E??? - F??? olduac_preauth: OldUacValue|endswith: - 1???? - 3???? - 5???? - 7???? - 9???? - B???? - D???? - F???? newuac_preauth: NewUacValue|endswith: - 1???? - 3???? - 5???? - 7???? - 9???? - B???? - D???? - F???? olduac_encrypted: OldUacValue|endswith: - 8?? - 9?? - A?? - B?? - C?? - D?? - E?? - F?? newuac_encrypted: NewUacValue|endswith: - 8?? - 9?? - A?? - B?? - C?? - D?? - E?? - F?? condition: selection and ((newuac_des and not olduac_des) or (newuac_preauth and not olduac_preauth) or (newuac_encrypted and not olduac_encrypted)) falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects a script interpreter process (like node.js or bun) spawning a known credential scanning tool (e.g., trufflehog,. Logsource: linux / process_creation. Rule: title: Script Interpreter Spawning Credential Scanner - Linux id: f0025a69-e1b7-4dda-a53c-db21fa2d4071 related: - id: 0f60b28c-64dd-4e2c-9a63-5334d3e3a6e6 type: similar status: experimental description: 'Detects a script interpreter process (like node.js or bun) spawning a known credential scanning tool (e.g., trufflehog, gitleaks). This behavior is indicative of an attempt to find and steal secrets, as seen in the "Shai-Hulud: The Second Coming" campaign. ' references: - https://github.com/asyncapi/cli/blob/2efa4dff59bc3d3cecdf897ccf178f99b115d63d/bun_environment.js - https://www.stepsecurity.io/blog/sha1-hulud-the-second-coming-zapier-ens-domains-and-other-prominent-npm-packages-compromised - https://www.endorlabs.com/learn/shai-hulud-2-malware-campaign-targets-github-and-cloud-credentials-using-bun-runtime - https://semgrep.dev/blog/2025/digging-for-secrets-sha1-hulud-the-second-coming-of-the-npm-worm/ author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-11-25 tags: - attack.credential-access - attack.t1552 - attack.execution - attack.collection - attack.t1005 - attack.t1059.004 logsource: category: process_creation product: linux detection: selection_parent: ParentImage|endswith: - /node - /bun selection_child: - Image|endswith: - /trufflehog - /gitleaks - CommandLine|contains: - trufflehog - gitleaks condition: all of selection_* falsepositives: - Legitimate pre-commit hooks or CI/CD pipeline jobs that use a script to run a credential scanner as part of a security check. level: high