Set Files as System Files Using Attrib.EXE

 1title: Set Files as System Files Using Attrib.EXE
 2id: bb19e94c-59ae-4c15-8c12-c563d23fe52b
 3related:
 4    - id: efec536f-72e8-4656-8960-5e85d091345b
 5      type: similar
 6status: test
 7description: Detects the execution of "attrib" with the "+s" flag to mark files as system files
 8references:
 9    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1564.001/T1564.001.md#atomic-test-3---create-windows-system-file-with-attrib
10    - https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/attrib
11    - https://unit42.paloaltonetworks.com/unit42-sure-ill-take-new-combojack-malware-alters-clipboards-steal-cryptocurrency/
12author: frack113
13date: 2022/02/04
14modified: 2023/03/14
15tags:
16    - attack.defense_evasion
17    - attack.t1564.001
18logsource:
19    category: process_creation
20    product: windows
21detection:
22    selection_img:
23        - Image|endswith: '\attrib.exe'
24        - OriginalFileName: 'ATTRIB.EXE'
25    selection_cli:
26        CommandLine|contains: ' +s '
27    condition: all of selection_*
28falsepositives:
29    - Unknown
30level: low

References

• atomic-red-team/atomics/T1564.001/T1564.001.md at f339e7da7d05f6057fdfcdd3742bfcf365fee2a9 · redcanaryco/atomic-red-team

  

  Small and highly portable detection tests based on MITRE's ATT&CK. - redcanaryco/atomic-red-team

  
  Read More

• attrib

  

  Reference article for the attrib command that displays, sets, or removes attributes assigned to files or directories.

  
  Read More

• Sure, I’ll take that! New ComboJack Malware Alters Clipboards to Steal Cryptocurrency

  

  Unit 42 discovers ComboJack, a new currency stealer that alters clipboards to steal cryptocurrency.

  
  Read More

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• Set Suspicious Files as System Files Using Attrib.EXE
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• Hiding Files with Attrib.exe
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