{"id":"bb58aa4a-b80b-415a-a2c0-2f65a4c81009","title":"Suspicious Desktopimgdownldr Command","description":"Detects a suspicious Microsoft desktopimgdownldr execution with parameters used to download files from the Internet","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2020-07-03","modified":"2021-11-27","tags":["attack.command-and-control","attack.t1105"],"technique_ids":["T1105"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["False positives depend on scripts and administrative tools used in the monitored environment"],"references":["https://labs.sentinelone.com/living-off-windows-land-a-new-native-file-downldr/","https://twitter.com/SBousseaden/status/1278977301745741825"],"source_path":"rules/windows/process_creation/proc_creation_win_desktopimgdownldr_susp_execution.yml","source_sha256":"e8856d32ad41a4c065ab0be1a4e430987d793d02f1d2c70ce42a70007b7b2cfd","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_desktopimgdownldr_susp_execution.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Desktopimgdownldr Command\nid: bb58aa4a-b80b-415a-a2c0-2f65a4c81009\nstatus: test\ndescription: Detects a suspicious Microsoft desktopimgdownldr execution with parameters used to download files from the Internet\nreferences:\n    - https://labs.sentinelone.com/living-off-windows-land-a-new-native-file-downldr/\n    - https://twitter.com/SBousseaden/status/1278977301745741825\nauthor: Florian Roth (Nextron Systems)\ndate: 2020-07-03\nmodified: 2021-11-27\ntags:\n    - attack.command-and-control\n    - attack.t1105\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection1:\n        CommandLine|contains: ' /lockscreenurl:'\n    selection1_filter:\n        CommandLine|contains:\n            - '.jpg'\n            - '.jpeg'\n            - '.png'\n    selection_reg:\n        CommandLine|contains|all:\n            - 'reg delete'\n            - '\\PersonalizationCSP'\n    condition: ( selection1 and not selection1_filter ) or selection_reg\nfalsepositives:\n    - False positives depend on scripts and administrative tools used in the monitored environment\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1105","id":"T1105","name":"Ingress Tool Transfer","page":"techniques/enterprise/T1105/"}],"data_path":"data/detection-rules/bb58aa4a-b80b-415a-a2c0-2f65a4c81009.json","kind":"sigma"}