{"id":"9f6a34b4-2688-4eb7-a7f5-e39fef573d0e","title":"Suspicious Windows Strings In URI","description":"Detects suspicious Windows strings in URI which could indicate possible exfiltration or webshell communication","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2022-06-06","modified":"2023-01-02","tags":["attack.persistence","attack.exfiltration","attack.t1505.003"],"technique_ids":["T1505.003"],"logsource":{"category":"webserver"},"falsepositives":["Legitimate application and websites that use windows paths in their URL"],"references":["https://thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/"],"source_path":"rules/web/webserver_generic/web_susp_windows_path_uri.yml","source_sha256":"3dbc74593863651129a35b480df5f7a717e59d1c5c853d18609486f32beb1af5","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/web/webserver_generic/web_susp_windows_path_uri.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Windows Strings In URI\nid: 9f6a34b4-2688-4eb7-a7f5-e39fef573d0e\nstatus: test\ndescription: Detects suspicious Windows strings in URI which could indicate possible exfiltration or webshell communication\nreferences:\n    - https://thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-06-06\nmodified: 2023-01-02\ntags:\n    - attack.persistence\n    - attack.exfiltration\n    - attack.t1505.003\nlogsource:\n    category: webserver\ndetection:\n    selection:\n        cs-uri-query|contains:\n            - '=C:/Users'\n            - '=C:/Program%20Files'\n            - '=C:/Windows'\n            - '=C%3A%5CUsers'\n            - '=C%3A%5CProgram%20Files'\n            - '=C%3A%5CWindows'\n    condition: selection\nfalsepositives:\n    - Legitimate application and websites that use windows paths in their URL\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1505.003","id":"T1505.003","name":"Web Shell","page":"techniques/enterprise/T1505.003/"}],"data_path":"data/detection-rules/9f6a34b4-2688-4eb7-a7f5-e39fef573d0e.json","kind":"sigma"}