{"id":"70e8e9b4-6a93-4cb7-8cde-da69502e7aff","title":"VMGuestLib DLL Sideload","description":"Detects DLL sideloading of VMGuestLib.dll by the WmiApSrv service.","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2022-12-01","modified":"","tags":["attack.persistence","attack.privilege-escalation","attack.execution","attack.stealth","attack.t1574.001"],"technique_ids":["T1574.001"],"logsource":{"category":"image_load","product":"windows"},"falsepositives":["FP could occur if the legitimate version of vmGuestLib already exists on the system"],"references":["https://decoded.avast.io/martinchlumecky/png-steganography/"],"source_path":"rules/windows/image_load/image_load_side_load_vmguestlib.yml","source_sha256":"b1e06957d7772c59c365eea1bff58284f3b7026b76933660d25dc883cedda028","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/image_load/image_load_side_load_vmguestlib.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: VMGuestLib DLL Sideload\nid: 70e8e9b4-6a93-4cb7-8cde-da69502e7aff\nstatus: test\ndescription: Detects DLL sideloading of VMGuestLib.dll by the WmiApSrv service.\nreferences:\n    - https://decoded.avast.io/martinchlumecky/png-steganography/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-12-01\ntags:\n    - attack.persistence\n    - attack.privilege-escalation\n    - attack.execution\n    - attack.stealth\n    - attack.t1574.001\nlogsource:\n    category: image_load\n    product: windows\ndetection:\n    selection:\n        ImageLoaded|contains|all:\n            - '\\VMware\\VMware Tools\\vmStatsProvider\\win32'\n            - '\\vmGuestLib.dll'\n        Image|endswith: '\\Windows\\System32\\wbem\\WmiApSrv.exe'\n    filter:\n        Signed: 'true'\n    condition: selection and not filter\nfalsepositives:\n    - FP could occur if the legitimate version of vmGuestLib already exists on the system\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1574.001","id":"T1574.001","name":"DLL","page":"techniques/enterprise/T1574.001/"}],"data_path":"data/detection-rules/70e8e9b4-6a93-4cb7-8cde-da69502e7aff.json","kind":"sigma"}