{"id":"3a9b8c1e-5b2e-4f7a-9d1c-2a7f3b6e1c55","title":"RunMRU Registry Key Deletion - Registry","description":"Detects attempts to delete the RunMRU registry key, which stores the history of commands executed via the run dialog.\nIn the clickfix techniques, the phishing lures instruct users to open a run dialog through (Win + R) and execute malicious commands.\nAdversaries may delete this key to cover their tracks after executing commands.\n","author":"Swachchhanda Shrawan Poudel (Nextron Systems)","status":"experimental","level":"high","date":"2025-09-25","modified":"","tags":["attack.stealth","attack.t1070.003"],"technique_ids":["T1070.003"],"logsource":{"category":"registry_delete","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.zscaler.com/blogs/security-research/coldriver-updates-arsenal-baitswitch-and-simplefix"],"source_path":"rules/windows/registry/registry_delete/registry_delete_runmru.yml","source_sha256":"000b18b054e56e5a37a0b44c12a21cae8f931ae59481e18c04c5c015fa852f55","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/registry/registry_delete/registry_delete_runmru.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: RunMRU Registry Key Deletion - Registry\nid: 3a9b8c1e-5b2e-4f7a-9d1c-2a7f3b6e1c55\nrelated:\n    - id: c11aecef-9c37-45a6-9c07-bc0782f963fd\n      type: similar\nstatus: experimental\ndescription: |\n    Detects attempts to delete the RunMRU registry key, which stores the history of commands executed via the run dialog.\n    In the clickfix techniques, the phishing lures instruct users to open a run dialog through (Win + R) and execute malicious commands.\n    Adversaries may delete this key to cover their tracks after executing commands.\nreferences:\n    - https://www.zscaler.com/blogs/security-research/coldriver-updates-arsenal-baitswitch-and-simplefix\nauthor: Swachchhanda Shrawan Poudel (Nextron Systems)\ndate: 2025-09-25\ntags:\n    - attack.stealth\n    - attack.t1070.003\nlogsource:\n    category: registry_delete\n    product: windows\ndetection:\n    selection:\n        TargetObject|endswith: '\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\RunMRU'\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\nregression_tests_path: regression_data/rules/windows/registry/registry_delete/registry_delete_runmru/info.yml\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1070.003","id":"T1070.003","name":"Clear Command History","page":"techniques/enterprise/T1070.003/"}],"data_path":"data/detection-rules/3a9b8c1e-5b2e-4f7a-9d1c-2a7f3b6e1c55.json","kind":"sigma"}