Query: Sigma YAML for windows / process_creation
Matching passage: Sigma rule: Detects process creation with suspicious whitespace padding followed by a '#' character, which may indicate ClickFix or. Logsource: windows / process_creation. Rule: title: Suspicious Explorer Process with Whitespace Padding - ClickFix/FileFix id: 3ae9974a-eb09-4044-8e70-8980a50c12c8 related: - id: 8f2a5c3d-9e4b-4a7c-8d1f-2e5a6b9c3d7e type: similar - id: 7a1b4c5e-8f3d-4b9a-7c2e-1f4a5b8c6d9e type: similar status: experimental description: 'Detects process creation with suspicious whitespace padding followed by a ''#'' character, which may indicate ClickFix or FileFix techniques used to conceal malicious commands from visual inspection. ClickFix and FileFix are social engineering attack techniques where adversaries distribute phishing documents or malicious links that deceive users into opening the Windows Run dialog box or File Explorer search bar. The victims are then instructed to paste commands from their clipboard, which contain extensive whitespace padding using various Unicode space characters to push the actual malicious command far to the right, effectively hiding it from immediate view. ' references: - https://expel.com/blog/cache-smuggling-when-a-picture-isnt-a-thousand-words/ - https://mrd0x.com/filefix-clickfix-alternative/ author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-11-04 modified: 2025-11-26 tags: - attack.execution - attack.stealth - attack.t1204.004 - attack.t1027.010 logsource: category: process_creation product: windows detection: selection_explorer: ParentImage|endswith: \explorer.exe CommandLine|contains: '#' selection_space_variation: CommandLine|contains: - - - - - - - - - - - - - ' ' condition: all of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects the configuration of a new ISATAP router on a Windows host. While ISATAP is a legitimate Microsoft technology fo. Logsource: windows / system. Rule: title: ISATAP Router Address Was Set id: d22df9cd-2aee-4089-93c7-9dc4eae77f2c status: experimental description: 'Detects the configuration of a new ISATAP router on a Windows host. While ISATAP is a legitimate Microsoft technology for IPv6 transition, unexpected or unauthorized ISATAP router configurations could indicate a potential IPv6 DNS Takeover attack using tools like mitm6. In such attacks, adversaries advertise themselves as DHCPv6 servers and set malicious ISATAP routers to intercept traffic. This detection should be correlated with network baselines and known legitimate ISATAP deployments in your environment. ' references: - https://www.blackhillsinfosec.com/mitm6-strikes-again-the-dark-side-of-ipv6/ - https://redfoxsec.com/blog/ipv6-dns-takeover/ - https://www.securityhq.com/blog/malicious-isatap-tunneling-unearthed-on-windows-server/ - https://medium.com/@ninnesoturan/detecting-ipv6-dns-takeover-a54a6a88be1f author: hamid date: 2025-10-19 tags: - attack.impact - attack.credential-access - attack.collection - attack.initial-access - attack.privilege-escalation - attack.execution - attack.t1557 - attack.t1565.002 logsource: product: windows service: system detection: selection: EventID: 4100 Provider_Name: Microsoft-Windows-Iphlpsvc filter_main_localhost: IsatapRouter: - 127.0.0.1 - ::1 filter_optional_null: IsatapRouter: null condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Legitimate ISATAP router configuration in enterprise environments - IPv6 transition projects and network infrastructure changes - Network administrators configuring dual-stack networking - Automatic ISATAP configuration in some Windows deployments level: medium