File Creation of Executables in Temp Folders (Event 4663)

 1title: File Creation of Executables in Temp Folders (Event 4663)
 2id: 069aacee-0176-4bdd-8c8b-09e958b88b70
 3status: experimental
 4description: Detects creation of files potentially matching attempts to copy executables to temporary directories to hide usage.
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1036.003/T1036.003.md#atomic-test-1---masquerading-as-windows-lsass-process
 7author: Micah Babinski
 8date: 2022/12/11
 9tags:
10    - attack.defense_evasion
11    - attack.t1036.003
12    - attack.t1036
13logsource:
14    product: windows
15    service: security
16detection:
17    selection:
18        EventID: 4663
19        ObjectType: 'File'
20        AccessList: '%%4417'
21        ObjectName|endswith: '.exe'
22        ObjectName|contains:
23            - 'temp'
24            - 'tmp'
25    condition: selection
26falsepositives:
27    - Unknown
28level: high```