{"id":"b697e69c-746f-4a86-9f59-7bfff8eab881","title":"UAC Bypass Using Disk Cleanup","description":"Detects the pattern of UAC Bypass using scheduled tasks and variable expansion of cleanmgr.exe (UACMe 34)","author":"Christian Burkard (Nextron Systems)","status":"test","level":"high","date":"2021-08-30","modified":"2024-12-01","tags":["attack.privilege-escalation","attack.t1548.002"],"technique_ids":["T1548.002"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://github.com/hfiref0x/UACME"],"source_path":"rules/windows/process_creation/proc_creation_win_uac_bypass_cleanmgr.yml","source_sha256":"b0c5e4393e3aafdbb4d49fe105b9a0bafb0e77cfaae2c138b76097e5432fc04d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_uac_bypass_cleanmgr.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: UAC Bypass Using Disk Cleanup\nid: b697e69c-746f-4a86-9f59-7bfff8eab881\nstatus: test\ndescription: Detects the pattern of UAC Bypass using scheduled tasks and variable expansion of cleanmgr.exe (UACMe 34)\nreferences:\n    - https://github.com/hfiref0x/UACME\nauthor: Christian Burkard (Nextron Systems)\ndate: 2021-08-30\nmodified: 2024-12-01\ntags:\n    - attack.privilege-escalation\n    - attack.t1548.002\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        CommandLine|endswith: '\"\\system32\\cleanmgr.exe /autoclean /d C:'\n        ParentCommandLine: 'C:\\Windows\\system32\\svchost.exe -k netsvcs -p -s Schedule'\n        IntegrityLevel:\n            - 'High'\n            - 'System'\n            - 'S-1-16-16384' # System\n            - 'S-1-16-12288' # High\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1548.002","id":"T1548.002","name":"Bypass User Account Control","page":"techniques/enterprise/T1548.002/"}],"data_path":"data/detection-rules/b697e69c-746f-4a86-9f59-7bfff8eab881.json","kind":"sigma"}