{"id":"fadb84f0-4e84-4f6d-a1ce-9ef2bffb6ccd","title":"Cloudflared Portable Execution","description":"Detects the execution of the \"cloudflared\" binary from a non standard location.\n","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2023-12-20","modified":"","tags":["attack.command-and-control","attack.t1090.001"],"technique_ids":["T1090.001"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Legitimate usage of Cloudflared portable versions"],"references":["https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/do-more-with-tunnels/trycloudflare/","https://github.com/cloudflare/cloudflared","https://www.intrinsec.com/akira_ransomware/","https://www.guidepointsecurity.com/blog/tunnel-vision-cloudflared-abused-in-the-wild/","https://github.com/cloudflare/cloudflared/releases"],"source_path":"rules/windows/process_creation/proc_creation_win_cloudflared_portable_execution.yml","source_sha256":"a9873bcefc17ed42e0eeb4c1cb05d1c1cb1aa2da90eed3a9cf010c9e2523ddea","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_cloudflared_portable_execution.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Cloudflared Portable Execution\nid: fadb84f0-4e84-4f6d-a1ce-9ef2bffb6ccd\nstatus: test\ndescription: |\n    Detects the execution of the \"cloudflared\" binary from a non standard location.\nreferences:\n    - https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/do-more-with-tunnels/trycloudflare/\n    - https://github.com/cloudflare/cloudflared\n    - https://www.intrinsec.com/akira_ransomware/\n    - https://www.guidepointsecurity.com/blog/tunnel-vision-cloudflared-abused-in-the-wild/\n    - https://github.com/cloudflare/cloudflared/releases\nauthor: Nasreddine Bencherchali (Nextron Systems)\ntags:\n    - attack.command-and-control\n    - attack.t1090.001\ndate: 2023-12-20\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        Image|endswith: '\\cloudflared.exe'\n    filter_main_admin_location:\n        Image|contains:\n            - ':\\Program Files (x86)\\cloudflared\\'\n            - ':\\Program Files\\cloudflared\\'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Legitimate usage of Cloudflared portable versions\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1090.001","id":"T1090.001","name":"Internal Proxy","page":"techniques/enterprise/T1090.001/"}],"data_path":"data/detection-rules/fadb84f0-4e84-4f6d-a1ce-9ef2bffb6ccd.json","kind":"sigma"}