{"id":"9465ddf4-f9e4-4ebd-8d98-702df3a93239","title":"IIS Native-Code Module Command Line Installation","description":"Detects suspicious IIS native-code module installations via command line","author":"Florian Roth (Nextron Systems)","status":"test","level":"medium","date":"2019-12-11","modified":"2024-03-13","tags":["attack.persistence","attack.t1505.003"],"technique_ids":["T1505.003"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown as it may vary from organisation to organisation how admins use to install IIS modules"],"references":["https://researchcenter.paloaltonetworks.com/2018/01/unit42-oilrig-uses-rgdoor-iis-backdoor-targets-middle-east/","https://www.microsoft.com/security/blog/2022/07/26/malicious-iis-extensions-quietly-open-persistent-backdoors-into-servers/"],"source_path":"rules/windows/process_creation/proc_creation_win_iis_appcmd_susp_module_install.yml","source_sha256":"15537dbd52d80be94495376345574208705cbba8a4e2e1b2fad6eba881040160","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_iis_appcmd_susp_module_install.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: IIS Native-Code Module Command Line Installation\nid: 9465ddf4-f9e4-4ebd-8d98-702df3a93239\nstatus: test\ndescription: Detects suspicious IIS native-code module installations via command line\nreferences:\n    - https://researchcenter.paloaltonetworks.com/2018/01/unit42-oilrig-uses-rgdoor-iis-backdoor-targets-middle-east/\n    - https://www.microsoft.com/security/blog/2022/07/26/malicious-iis-extensions-quietly-open-persistent-backdoors-into-servers/\nauthor: Florian Roth (Nextron Systems)\ndate: 2019-12-11\nmodified: 2024-03-13\ntags:\n    - attack.persistence\n    - attack.t1505.003\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith: '\\appcmd.exe'\n        - OriginalFileName: 'appcmd.exe'\n    selection_cli:\n        CommandLine|contains|all:\n            - 'install'\n            - 'module'\n        CommandLine|contains|windash: '-name:'\n    filter_iis_setup:\n        ParentImage: 'C:\\Windows\\System32\\inetsrv\\iissetup.exe'\n    condition: all of selection_* and not 1 of filter_*\nfalsepositives:\n    - Unknown as it may vary from organisation to organisation how admins use to install IIS modules\nlevel: medium\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/9465ddf4-f9e4-4ebd-8d98-702df3a93239.json","kind":"sigma"}