{"id":"0955e4e1-c281-4fb9-9ee1-5ee7b4b754d2","title":"Use of Pcalua For Execution","description":"Detects execition of commands and binaries from the context of The program compatibility assistant (Pcalua.exe). This can be used as a LOLBIN in order to bypass application whitelisting.","author":"Nasreddine Bencherchali (Nextron Systems), E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community","status":"test","level":"medium","date":"2022-06-14","modified":"2023-01-04","tags":["attack.execution","attack.t1059"],"technique_ids":["T1059"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Legitimate use by a via a batch script or by an administrator."],"references":["https://lolbas-project.github.io/lolbas/Binaries/Pcalua/","https://pentestlab.blog/2020/07/06/indirect-command-execution/"],"source_path":"rules/windows/process_creation/proc_creation_win_lolbin_pcalua.yml","source_sha256":"43da09920dde5cc5b8e0cc70bc972928072eb3e0cc5826b3802753587d770487","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_lolbin_pcalua.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Use of Pcalua For Execution\nid: 0955e4e1-c281-4fb9-9ee1-5ee7b4b754d2\nrelated:\n    - id: fa47597e-90e9-41cd-ab72-c3b74cfb0d02\n      type: obsolete\nstatus: test\ndescription: Detects execition of commands and binaries from the context of The program compatibility assistant (Pcalua.exe). This can be used as a LOLBIN in order to bypass application whitelisting.\nreferences:\n    - https://lolbas-project.github.io/lolbas/Binaries/Pcalua/\n    - https://pentestlab.blog/2020/07/06/indirect-command-execution/\nauthor: Nasreddine Bencherchali (Nextron Systems), E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community\ndate: 2022-06-14\nmodified: 2023-01-04\ntags:\n    - attack.execution\n    - attack.t1059\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        Image|endswith: '\\pcalua.exe'\n        CommandLine|contains: ' -a' # No space after the flag because it accepts anything as long as there a \"-a\"\n    condition: selection\nfalsepositives:\n    - Legitimate use by a via a batch script or by an administrator.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1059","id":"T1059","name":"Command and Scripting Interpreter","page":"techniques/enterprise/T1059/"}],"data_path":"data/detection-rules/0955e4e1-c281-4fb9-9ee1-5ee7b4b754d2.json","kind":"sigma"}