Query: Sigma YAML for gcp / gcp.audit
Matching passage: Sigma rule: Identifies when a service account is disabled or deleted in Google Cloud.. Logsource: gcp / gcp.audit. Rule: title: Google Cloud Service Account Disabled or Deleted id: 13f81a90-a69c-4fab-8f07-b5bb55416a9f status: test description: Identifies when a service account is disabled or deleted in Google Cloud. references: - https://cloud.google.com/iam/docs/reference/rest/v1/projects.serviceAccounts author: Austin Songer @austinsonger date: 2021-08-14 modified: 2022-10-09 tags: - attack.impact - attack.t1531 logsource: product: gcp service: gcp.audit detection: selection: gcp.audit.method_name|endswith: - .serviceAccounts.disable - .serviceAccounts.delete condition: selection falsepositives: - Service Account being disabled or deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - Service Account disabled or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium
Near-miss passage: Sigma rule: Detects the execution of certutil with certain flags that allow the utility to download files from file-sharing websites. Logsource: windows / process_creation. Rule: title: Suspicious File Downloaded From File-Sharing Website Via Certutil.EXE id: 42a5f1e7-9603-4f6d-97ae-3f37d130d794 related: - id: 19b08b1c-861d-4e75-a1ef-ea0c1baf202b type: similar - id: 13e6fe51-d478-4c7e-b0f2-6da9b400a829 type: similar - id: 8b48ad89-10d8-4382-a546-50588c410f0d type: similar - id: d635249d-86b5-4dad-a8c7-d7272b788586 type: similar - id: 52182dfb-afb7-41db-b4bc-5336cb29b464 type: similar - id: ae02ed70-11aa-4a22-b397-c0d0e8f6ea99 type: similar - id: e0f8ab85-0ac9-423b-a73a-81b3c7b1aa97 type: similar - id: 7b434893-c57d-4f41-908d-6a17bf1ae98f type: similar - id: 8518ed3d-f7c9-4601-a26c-f361a4256a0c type: similar - id: 56454143-524f-49fb-b1c6-3fb8b1ad41fb type: similar - id: b6e04788-29e1-4557-bb14-77f761848ab8 type: similar - id: a0d7e4d2-bede-4141-8896-bc6e237e977c type: similar - id: 297ae038-edc2-4b2e-bb3e-7c5fc94dd5c7 type: similar status: test description: Detects the execution of certutil with certain flags that allow the utility to download files from file-sharing websites. references: - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/certutil - https://forensicitguy.github.io/agenttesla-vba-certutil-download/ - https://news.sophos.com/en-us/2021/04/13/compromised-exchange-server-hosting-cryptojacker-targeting-other-exchange-servers/ - https://twitter.com/egre55/status/1087685529016193025 - https://lolbas-project.github.io/lolbas/Binaries/Certutil/ - https://www.microsoft.com/en-us/security/blog/2024/01/17/new-ttps-observed-in-mint-sandstorm-campaign-targeting-high-profile-individuals-at-universities-and-research-orgs/ - https://www.hexacorn.com/blog/2020/08/23/certutil-one-more-gui-lolbin author: Nasreddine Bencherchali (Nextron Systems) date: 2023-02-15 modified: 2026-03-29 tags: - attack.stealth - attack.t1027 - attack.command-and-control - attack.t1105 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \certutil.exe - OriginalFileName: CertUtil.exe selection_flags: CommandLine|contains: - 'urlcache ' - 'verifyctl ' - 'URL ' selection_http: CommandLine|contains: - .githubusercontent.com - 0x0.st - anonfiles.com - bashupload.com - cdn.discordapp.com - chunk.io - ddns.net - dl.dropboxusercontent.com - ghostbin.co - github.com - glitch.me - gofile.io - hastebin.com - mediafire.com - mega.nz - onrender.com - pages.dev - paste.ee - pastebin.com - pastebin.pl - pastetext.net - privatlab.com - privatlab.net - send.exploit.in - sendspace.com - storage.goo