In April 2025, cybersecurity experts uncovered a sophisticated phishing campaign exploiting Google Sites and DKIM replay attacks to distribute seemingly legitimate emails that redirected recipients to fraudulent sites designed to harvest credentials .
Anatomy of the Attack
This phishing scheme employed a multi-step process:
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Creation of a Google Account: Attackers established a Google account using a newly registered domain.
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Deployment of a Malicious OAuth Application: They developed a Google OAuth application named to mimic the content of a phishing message.
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Generation of a Legitimate Security Alert: By granting the OAuth app access to their Google account, Google automatically sent a security alert email to the account, which was DKIM-signed and appeared authentic.
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Forwarding the Email to Targets: The attackers forwarded this legitimate-looking email to victims, preserving the DKIM signature, making it seem as though it originated from Google.The Hacker News
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Redirection to a Phishing Site: The email contained a link to a Google Sites page that closely resembled a genuine Google Support page. This page prompted users to “upload additional documents” or “view the case,” leading them to a counterfeit Google Account sign-in page hosted on Google Sites.
This method allowed the phishing email to bypass standard security checks, as it passed SPF, DKIM, and DMARC validations, making it particularly deceptive.
How Hi-Tex Solutions Can Help
Hi-Tex Solutions offers a comprehensive suite of services to combat such advanced phishing attacks:
1. Advanced Email Security
Hi-Tex provides robust email security solutions that include:
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Spam Filtering: Scanning every email through Microsoft Exchange servers to detect and block spam and malicious content.
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Email Encryption: Ensuring that sensitive information is encrypted during transmission to prevent unauthorized access.
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User-Friendly Management Portal: Allowing users to manage email preferences, including quarantine settings and black/white lists .
2. Email Authentication Protocols
Implementing and managing email authentication protocols such as SPF, DKIM, and DMARC to verify the legitimacy of incoming emails and prevent spoofing .
3. Security and Compliance Services
Specializing in HIPAA and PCI compliance, Hi-Tex ensures that your organization meets industry standards for data protection and security .
4. Employee Training and Awareness
Conducting regular security audits and providing training to employees to recognize and report phishing attempts, thereby strengthening the organization’s human firewall .
Protect Your Organization Today
In the face of evolving phishing tactics, it’s crucial to have a trusted partner to safeguard your organization’s digital assets. Hi-Tex Solutions offers tailored cybersecurity services to meet your specific needs.
For businesses in San Antonio and the surrounding areas, Hi-Tex provides local expertise with 24/7 support .
Contact Hi-Tex Solutions today to schedule a consultation and fortify your defenses against sophisticated phishing attacks.