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8d18ec7df0
update: FileFix - Suspicious Child Process from Browser File Upload Abuse - add cmd.exe child process --------- Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
39 lines
1.4 KiB
YAML
39 lines
1.4 KiB
YAML
title: FileFix - Suspicious Child Process from Browser File Upload Abuse
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id: 4be03877-d5b6-4520-85c9-a5911c0a656c
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status: experimental
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description: |
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Detects potentially suspicious subprocesses such as LOLBINs spawned by web browsers. This activity could be associated with the "FileFix" social engineering technique,
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where users are tricked into launching the file explorer via a browser-based phishing page and pasting malicious commands into the address bar.
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The technique abuses clipboard manipulation and disguises command execution as benign file path access, resulting in covert execution of system utilities.
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references:
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- https://mrd0x.com/filefix-clickfix-alternative/
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author: 0xFustang
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date: 2025-06-26
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modified: 2025-06-30
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tags:
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- attack.execution
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- attack.t1204.004
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logsource:
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category: process_creation
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product: windows
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detection:
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selection:
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ParentImage|endswith:
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- '\brave.exe'
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- '\chrome.exe'
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- '\firefox.exe'
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- '\msedge.exe'
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Image|endswith:
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- '\bitsadmin.exe'
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- '\certutil.exe'
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- '\cmd.exe'
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- '\mshta.exe'
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- '\powershell.exe'
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- '\pwsh.exe'
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- '\regsvr32.exe'
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CommandLine|contains: '#'
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condition: selection
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falsepositives:
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- Legitimate use of PowerShell or other utilities launched from browser extensions or automation tools
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level: high
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