{"id":"1712bafe-be05-4a0e-89d4-17a3ed151bf5","title":"Potential Hello-World Scraper Botnet Activity","description":"Detects network traffic potentially associated with a scraper botnet variant that uses the \"Hello-World/1.0\" user-agent string.\n","author":"Joseph A. M.","status":"experimental","level":"medium","date":"2025-08-02","modified":"","tags":["attack.reconnaissance","attack.t1595"],"technique_ids":["T1595"],"logsource":{"category":"proxy"},"falsepositives":["Legitimate network monitoring or vulnerability scanning tools that may use this generic user agent.","Internal development or testing scripts. Consider filtering by source IP if this is expected from certain systems."],"references":["https://www.greynoise.io/blog/new-scraper-botnet-concentrated-in-taiwan","https://viz.greynoise.io/tags/hello-world-scraper-botnet?days=30"],"source_path":"rules/web/proxy_generic/proxy_hello_world_user_agent.yml","source_sha256":"9fd2b9fb41d59b4c75d5b05e525da860a649270a88fd874c632d691e63fa2f56","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/web/proxy_generic/proxy_hello_world_user_agent.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Hello-World Scraper Botnet Activity\nid: 1712bafe-be05-4a0e-89d4-17a3ed151bf5\nstatus: experimental\ndescription: |\n    Detects network traffic potentially associated with a scraper botnet variant that uses the \"Hello-World/1.0\" user-agent string.\nreferences:\n    - https://www.greynoise.io/blog/new-scraper-botnet-concentrated-in-taiwan\n    - https://viz.greynoise.io/tags/hello-world-scraper-botnet?days=30\nauthor: Joseph A. M.\ndate: 2025-08-02\ntags:\n    - attack.reconnaissance\n    - attack.t1595\nlogsource:\n    category: proxy\ndetection:\n    selection:\n        c-useragent: 'Hello-World/1.0'\n        cs-method: 'GET'\n    condition: selection\nfalsepositives:\n    - Legitimate network monitoring or vulnerability scanning tools that may use this generic user agent.\n    - Internal development or testing scripts. Consider filtering by source IP if this is expected from certain systems.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1595","id":"T1595","name":"Active Scanning","page":"techniques/enterprise/T1595/"}],"data_path":"data/detection-rules/1712bafe-be05-4a0e-89d4-17a3ed151bf5.json","kind":"sigma"}