{"id":"b6188d2f-b3c4-4d2c-a17d-9706e0851af0","title":"Potential Goopdate.DLL Sideloading","description":"Detects potential DLL sideloading of \"goopdate.dll\", a DLL used by googleupdate.exe","author":"X__Junior (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2023-05-15","modified":"2025-10-07","tags":["attack.persistence","attack.privilege-escalation","attack.execution","attack.stealth","attack.t1574.001"],"technique_ids":["T1574.001"],"logsource":{"category":"image_load","product":"windows"},"falsepositives":["False positives are expected from Google Chrome installations running from user locations (AppData) and other custom locations. Apply additional filters accordingly.","Other third party chromium browsers located in AppData"],"references":["https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/goofy-guineapig/NCSC-MAR-Goofy-Guineapig.pdf"],"source_path":"rules/windows/image_load/image_load_side_load_goopdate.yml","source_sha256":"8ce09cdb41b1b705c1953cb44f684674707b64f8a1b5e6d9af0e838ecaa14177","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/image_load/image_load_side_load_goopdate.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Goopdate.DLL Sideloading\nid: b6188d2f-b3c4-4d2c-a17d-9706e0851af0\nstatus: test\ndescription: Detects potential DLL sideloading of \"goopdate.dll\", a DLL used by googleupdate.exe\nreferences:\n    - https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/goofy-guineapig/NCSC-MAR-Goofy-Guineapig.pdf\nauthor: X__Junior (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-05-15\nmodified: 2025-10-07\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|endswith: '\\goopdate.dll'\n    filter_main_generic:\n        ImageLoaded|startswith:\n            # Many third party chromium based apps use this DLLs. It's better to create a baseline and add specific filters\n            - 'C:\\Program Files (x86)\\'\n            - 'C:\\Program Files\\'\n    filter_optional_dropbox_installer_temp:\n        Image|contains|all:\n            - '\\AppData\\Local\\Temp\\GUM'\n            - '.tmp\\Dropbox'\n        ImageLoaded|contains|all:\n            - '\\AppData\\Local\\Temp\\GUM'\n            - '.tmp\\goopdate.dll'\n    filter_optional_googleupdate_temp:\n        Image|contains:\n            - '\\AppData\\Local\\Temp\\GUM'\n            - ':\\Windows\\SystemTemp\\GUM'\n        Image|endswith: '.tmp\\GoogleUpdate.exe'\n        ImageLoaded|contains:\n            - '\\AppData\\Local\\Temp\\GUM'\n            - ':\\Windows\\SystemTemp\\GUM'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\nfalsepositives:\n    - False positives are expected from Google Chrome installations running from user locations (AppData) and other custom locations. Apply additional filters accordingly.\n    - Other third party chromium browsers located in AppData\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/b6188d2f-b3c4-4d2c-a17d-9706e0851af0.json","kind":"sigma"}