SpamGPT Amps Up Enterprise Email Security Threats
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<p><span data-contrast="none">Nothing good <a href="https://securityboulevard.com/2025/08/email-hacked-7-steps-to-recover-stop-spammers-fast/" target="_blank" rel="noopener">ever comes from spam</a> (both the digital version and the kind in a tin). At the very least, it’s annoying and sucks up resources. At its worst, spam provides cover for nefarious and damaging activity. </span></p><p><span data-contrast="none">And that latter is the mission of SpamGPT, an AI-based email attack automation kit being sold on underground forums that researchers at Varonis detailed in </span><a href="https://share.google/d50DS7fyYUljD7EO1" target="_blank" rel="noopener"><span data-contrast="none">a recent blog post</span></a><span data-contrast="none">. It is meant “to compromise email servers, bypass spam filters, and orchestrate mass phishing campaigns with unprecedented ease,” Varonis said of the Spam-as-a-Service platform that darker elements are advertising as “a game-changer for cybercriminals.”</span></p><p><span data-contrast="none">SpamGPT, says Toby Lewis, global head of threat analysis at Darktrace, </span><span data-contrast="none">“represents another example of how attackers are evolving their tactics to operate with greater speed and sophistication.”</span></p><div class="code-block code-block-12 ai-track" data-ai="WzEyLCIiLCJCbG9jayAxMiIsIiIsMV0=" style="margin: 8px 0; clear: both;"> <style> .ai-rotate {position: relative;} .ai-rotate-hidden {visibility: hidden;} .ai-rotate-hidden-2 {position: absolute; top: 0; left: 0; width: 100%; height: 100%;} .ai-list-data, .ai-ip-data, .ai-filter-check, .ai-fallback, .ai-list-block, .ai-list-block-ip, .ai-list-block-filter {visibility: hidden; position: absolute; width: 50%; height: 1px; top: -1000px; z-index: -9999; margin: 0px!important;} .ai-list-data, .ai-ip-data, .ai-filter-check, .ai-fallback {min-width: 1px;} </style> <div class="ai-rotate ai-unprocessed ai-timed-rotation ai-12-1" data-info="WyIxMi0xIiwxXQ==" style="position: relative;"> <div class="ai-rotate-option" style="visibility: hidden;" data-index="1" data-name="VGVjaHN0cm9uZyBHYW5nIFlvdXR1YmU=" data-time="MTA="> <div class="custom-ad"> <div style="margin: auto; text-align: center;"><a href="https://youtu.be/Fojn5NFwaw8" target="_blank"><img src="https://securityboulevard.com/wp-content/uploads/2024/12/Techstrong-Gang-Youtube-PodcastV2-770.png" alt="Techstrong Gang Youtube"></a></div> <div class="clear-custom-ad"></div> </div></div> </div> </div><p><span data-contrast="none">The tool, whose interface and features mimic that of a professional marketing service, combines generative AI with email campaign tools, making it easier for miscreants to launch spam and phishing attacks…at scale, Varonis said. It’s encrypted and even includes an AI marketing assistant, dubbed KaliGPT, which generates phishing email content and suggests optimizations. </span></p><p><span data-contrast="none">“This means attackers no longer need to write convincing phishing emails; they can ask the AI for persuasive scam templates, subject lines, or targeting advice within the spam toolkit,” said Varonis. </span></p><div class="code-block code-block-15" style="margin: 8px 0; clear: both;"> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-2091799172090865" crossorigin="anonymous"></script> <!-- SB In Article Ad 1 --> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-2091799172090865" data-ad-slot="8723094367" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script></div><p><span data-contrast="none">“While the service infrastructure underpinning phishing campaigns hasn’t fundamentally changed, the incorporation of generative AI for content creation represents a step forward,” Lewis says.</span></p><p><span data-contrast="none">Just like the tools used by legitimate marketers, SpamGPT’s dashboard also monitors and controls campaigns in real-time. Attackers get immediate feedback on delivery and engagement.</span></p><p><span data-contrast="none">Varonis calls it equally interesting that SpamGPT puts emphasis on scale and deliverability. “The platform promises guaranteed inbox delivery for popular email providers (Gmail, Outlook, Yahoo, Microsoft 365, etc.), implying that it has been fine-tuned to bypass their email filters,” the researchers wrote.</span></p><p><span data-contrast="none">Its ability to engineer bulk email that lands in inboxes rests in large part on “abusing trusted cloud providers like Amazon AWS or SendGrid to blend in with legitimate mail traffic,” said Varonis. That combination of features “gives attackers a professional-grade spam operation at their fingertips.”</span></p><p><span data-contrast="none">All in all, SpamGPT lowers the barrier for bad actors who want to launch spam and phishing attacks at scale. It offers a lauded training program for “SMTP cracking mastery” that “teaches buyers how to acquire or generate high-quality SMTP servers for sending spam.”</span></p><p><span data-contrast="none">The ads on underground forums tout it as insider training that “reveals secret techniques to effortlessly crack SMTP servers and even create an unlimited supply of SMTP accounts on demand,” Varonis researchers noted, which means “even less-skilled criminals could gain access to compromised or misconfigured mail servers to relay their campaigns.”</span></p><p><span data-contrast="none">They can also learn about and access spoofing techniques since “the campaign creation interface allows multiple sender identities and custom email headers, enabling attackers to impersonate trusted domains or brands.”</span></p><p><span data-contrast="none">Since buyers can forge sender details, they can bypass basic email authentication checks and then coax recipients to trust phishing emails. “Using valid SMTP credentials and carefully made headers can defeat rudimentary anti-spoofing controls, especially if target domains lack strict DMARC/SPF/DKIM enforcement,” Varonis explained.</span></p><p><span data-contrast="none">SpamGPT also offers built-in SMTP/IMAP management and monitoring so that attackers “can bulk import SMTP accounts (the tool even provides a bulk SMTP & IMAP checker utility) to validate that credentials work and are not blocked.”</span></p><p><span data-contrast="none">Campaigns have dozens of SMTP servers to choose from and/or pool for large campaigns. And the tool also manages IMAP accounts with monitoring, letting the attacker “log into inboxes to collect data, for example, to catch auto replies and bounces or to test whether messages land in the inbox vs. spam,” Varonis researchers said.</span></p><p><span data-contrast="none">“SpamGPT highlights something we’ve known for a while: email is no longer the right battlefield to defend employees,” says Aviv Nahum, CEO at Above Security. </span></p><p><span data-contrast="none">Noting that “the notion that a gateway scanning trillions of messages can hold the line is collapsing,” Nahum said “sophisticated campaigns increasingly weaponize </span><i><span data-contrast="none">trusted</span></i><span data-contrast="none"> sites and services, leaving traditional email security tools in shambles.”</span></p><p><span data-contrast="none">Instead,”the real shift has to happen at the employee and endpoint level,” he says. </span></p><p><span data-contrast="none">“Once a malicious message inevitably lands, the question becomes: can we spot the risky click or data action in real time, and coach the employee in-flow to prevent escalation?” says Nahum. “Security that shapes behavior — not just blocks — is how organizations will actually cut repeat incidents.”</span></p><p><span data-contrast="none">The future of email security, he says, is “protect the person, not just the perimeter.”</span></p><div class="spu-placeholder" style="display:none"></div><div class="addtoany_share_save_container addtoany_content addtoany_content_bottom"><div class="a2a_kit a2a_kit_size_20 addtoany_list" data-a2a-url="https://securityboulevard.com/2025/09/spamgpt-amps-up-enterprise-email-security-threats/" data-a2a-title="SpamGPT Amps Up Enterprise Email Security Threats "><a class="a2a_button_twitter" href="https://www.addtoany.com/add_to/twitter?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F09%2Fspamgpt-amps-up-enterprise-email-security-threats%2F&linkname=SpamGPT%20Amps%20Up%20Enterprise%20Email%20Security%20Threats%C2%A0" title="Twitter" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_linkedin" href="https://www.addtoany.com/add_to/linkedin?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F09%2Fspamgpt-amps-up-enterprise-email-security-threats%2F&linkname=SpamGPT%20Amps%20Up%20Enterprise%20Email%20Security%20Threats%C2%A0" title="LinkedIn" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_facebook" href="https://www.addtoany.com/add_to/facebook?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F09%2Fspamgpt-amps-up-enterprise-email-security-threats%2F&linkname=SpamGPT%20Amps%20Up%20Enterprise%20Email%20Security%20Threats%C2%A0" title="Facebook" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_reddit" href="https://www.addtoany.com/add_to/reddit?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F09%2Fspamgpt-amps-up-enterprise-email-security-threats%2F&linkname=SpamGPT%20Amps%20Up%20Enterprise%20Email%20Security%20Threats%C2%A0" title="Reddit" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_email" href="https://www.addtoany.com/add_to/email?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F09%2Fspamgpt-amps-up-enterprise-email-security-threats%2F&linkname=SpamGPT%20Amps%20Up%20Enterprise%20Email%20Security%20Threats%C2%A0" title="Email" rel="nofollow noopener" target="_blank"></a><a class="a2a_dd addtoany_share_save addtoany_share" href="https://www.addtoany.com/share"></a></div></div>