Potential Persistence Via Logon Scripts - Registry

calendar Nov 26, 2025 · attack.privilege-escalation attack.t1037.001 attack.persistence attack.lateral-movement  ·
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Detects creation of "UserInitMprLogonScript" registry value which can be used as a persistence method by malicious actors

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 1title: Potential Persistence Via Logon Scripts - Registry
 2id: 9ace0707-b560-49b8-b6ca-5148b42f39fb
 3status: test
 4description: Detects creation of "UserInitMprLogonScript" registry value which can be used as a persistence method by malicious actors
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1037.001/T1037.001.md
 7author: Tom Ueltschi (@c_APT_ure)
 8date: 2019-01-12
 9modified: 2025-10-26
10tags:
11    - attack.privilege-escalation
12    - attack.t1037.001
13    - attack.persistence
14    - attack.lateral-movement
15logsource:
16    category: registry_set
17    product: windows
18detection:
19    selection:
20        TargetObject|contains: 'UserInitMprLogonScript'
21    condition: selection
22falsepositives:
23    - Investigate the contents of the "UserInitMprLogonScript" value to determine of the added script is legitimate
24level: medium
25regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_persistence_logon_scripts_userinitmprlogonscript/info.yml
26simulation:
27    - type: atomic-red-team
28      name: Logon Scripts
29      technique: T1037.001
30      atomic_guid: d6042746-07d4-4c92-9ad8-e644c114a231

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