Query: Sigma rule for Detects the suspicious use of the Velociraptor DFIR tool to execute other tools or download additional payloads, as seen
Matching passage: Sigma rule: Detects the suspicious use of the Velociraptor DFIR tool to execute other tools or download additional payloads, as seen. Logsource: windows / process_creation. Rule: title: Suspicious Velociraptor Child Process id: 4bc90587-e6ca-4b41-be0b-ed4d04e4ed0c status: experimental description: Detects the suspicious use of the Velociraptor DFIR tool to execute other tools or download additional payloads, as seen in a campaign where it was abused for remote access and to stage further attacks. references: - https://news.sophos.com/en-us/2025/08/26/velociraptor-incident-response-tool-abused-for-remote-access/ author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-08-29 tags: - attack.command-and-control - attack.persistence - attack.t1219 logsource: category: process_creation product: windows detection: selection_parent: ParentImage|endswith: \Velociraptor.exe selection_child_vscode_tunnel: CommandLine|contains|all: - code.exe - tunnel - --accept-server-license-terms selection_child_msiexec: CommandLine|contains|all: - msiexec - /i - http selection_child_powershell: Image|endswith: - \powershell.exe - \powershell_ise.exe - \pwsh.exe CommandLine|contains: - 'Invoke-WebRequest ' - 'IWR ' - .DownloadFile - .DownloadString condition: selection_parent and 1 of selection_child_* falsepositives: - Legitimate administrators or incident responders might use Velociraptor to execute scripts or tools. However, the combination of Velociraptor spawning these specific processes with these command lines is suspicious. Tuning may be required to exclude known administrative actions or specific scripts. level: high
Near-miss passage: Sigma rule: Detects the execution of certutil with either the "decode" or "decodehex" flags to decode base64 or hex encoded files. T. Logsource: windows / process_creation. Rule: title: File Decoded From Base64/Hex Via Certutil.EXE id: cc9cbe82-7bc0-4ef5-bc23-bbfb83947be7 status: test description: Detects the execution of certutil with either the "decode" or "decodehex" flags to decode base64 or hex encoded files. This can be abused by attackers to decode an encoded payload before execution references: - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/certutil - https://unit42.paloaltonetworks.com/new-babyshark-malware-targets-u-s-national-security-think-tanks/ - https://news.sophos.com/en-us/2021/04/13/compromised-exchange-server-hosting-cryptojacker-targeting-other-exchange-servers/ - https://twitter.com/JohnLaTwC/status/835149808817991680 - https://learn.microsoft.com/en-us/archive/blogs/pki/basic-crl-checking-with-certutil - https://lolbas-project.github.io/lolbas/Binaries/Certutil/ author: Florian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.community date: 2023-02-15 modified: 2025-06-04 tags: - attack.stealth - attack.t1027 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \certutil.exe - OriginalFileName: CertUtil.exe selection_cli: CommandLine|contains|windash: - '-decode ' - '-decodehex ' condition: all of selection_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_certutil_decode/info.yml