Dump Credentials from Windows Credential Manager With PowerShell

Adversaries may search for common password storage locations to obtain user credentials. Passwords are stored in several places on a system, depending on the operating system or application holding the credentials.

Sigma rule (View on GitHub)

 1title: Dump Credentials from Windows Credential Manager With PowerShell
 2id: 99c49d9c-34ea-45f7-84a7-4751ae6b2cbc
 3status: test
 4description: |
 5    Adversaries may search for common password storage locations to obtain user credentials.
 6    Passwords are stored in several places on a system, depending on the operating system or application holding the credentials.    
 7references:
 8    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1555/T1555.md
 9author: frack113
10date: 2021-12-20
11modified: 2022-12-25
12tags:
13    - attack.credential-access
14    - attack.t1555
15logsource:
16    product: windows
17    category: ps_script
18    definition: 'Requirements: Script Block Logging must be enabled'
19detection:
20    selection_kiddie:
21        ScriptBlockText|contains:
22            - 'Get-PasswordVaultCredentials'
23            - 'Get-CredManCreds'
24    selection_rename_Password:
25        ScriptBlockText|contains|all:
26            - 'New-Object'
27            - 'Windows.Security.Credentials.PasswordVault'
28    selection_rename_credman:
29        ScriptBlockText|contains|all:
30            - 'New-Object'
31            - 'Microsoft.CSharp.CSharpCodeProvider'
32            - '[System.Runtime.InteropServices.RuntimeEnvironment]::GetRuntimeDirectory())'
33            - 'Collections.ArrayList'
34            - 'System.CodeDom.Compiler.CompilerParameters'
35    condition: 1 of selection_*
36falsepositives:
37    - Unknown
38level: medium

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