PUA - Nimgrab Execution

 1title: PUA - Nimgrab Execution
 2id: 74a12f18-505c-4114-8d0b-8448dd5485c6
 3status: test
 4description: Detects the usage of nimgrab, a tool bundled with the Nim programming framework and used for downloading files.
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/28d190330fe44de6ff4767fc400cc10fa7cd6540/atomics/T1105/T1105.md
 7author: frack113
 8date: 2022/08/28
 9modified: 2023/02/13
10tags:
11    - attack.command_and_control
12    - attack.t1105
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_name:
18        Image|endswith: '\nimgrab.exe'
19    selection_hashes:
20        Hashes|contains:
21            - MD5=2DD44C3C29D667F5C0EF5F9D7C7FFB8B
22            - SHA256=F266609E91985F0FE3E31C5E8FAEEEC4FFA5E0322D8B6F15FE69F4C5165B9559
23            - IMPHASH=C07FDDD21D123EA9B3A08EEF44AAAC45
24    selection_hash:
25        - md5: 2DD44C3C29D667F5C0EF5F9D7C7FFB8B
26        - sha256: F266609E91985F0FE3E31C5E8FAEEEC4FFA5E0322D8B6F15FE69F4C5165B9559
27        - Imphash: C07FDDD21D123EA9B3A08EEF44AAAC45
28    condition: 1 of selection_*
29falsepositives:
30    - Legitimate use of Nim on a developer systems
31level: high