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Image Credit: Siliconangle

Splunk uncovers surge in social engineering through fake CAPTCHA attacks

  • Splunk Inc. warns of a surge in social engineering campaigns using fake CAPTCHA systems to deliver malware without relying on software vulnerabilities.
  • These attacks, dubbed 'ClickFix' and 'FakeCAPTCHA,' trick users into self-infecting their systems by exploiting familiarity with verification systems and using clipboard manipulation techniques.
  • The attacks lure victims to malicious websites resembling Google's reCAPTCHA or Cloudflare CAPTCHA pages, prompting users to trigger hidden JavaScript that downloads and executes second-stage payloads.
  • To combat this threat, Splunk researchers have introduced open-source tools like ClickGrab and PasteEater, along with detection queries to help organizations monitor for FakeCAPTCHA activity.

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