Suspicious Creation TXT File in User Desktop

Ransomware create txt file in the user Desktop

Sigma rule (View on GitHub)

 1title: Suspicious Creation TXT File in User Desktop
 2id: caf02a0a-1e1c-4552-9b48-5e070bd88d11
 3status: test
 4description: Ransomware create txt file in the user Desktop
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1486/T1486.md#atomic-test-5---purelocker-ransom-note
 7author: frack113
 8date: 2021/12/26
 9tags:
10    - attack.impact
11    - attack.t1486
12logsource:
13    product: windows
14    category: file_event
15detection:
16    selection:
17        Image|endswith: '\cmd.exe'
18        TargetFilename|contains|all:
19            - '\Users\'
20            - '\Desktop\'
21        TargetFilename|endswith: '.txt'
22    condition: selection
23falsepositives:
24    - Unknown
25level: high

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